Energy Conservation Program: Test Procedures for Walk-In Coolers and Walk-In Freezers, 33631-33639 [C1-2011-8690]
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Federal Register / Vol. 76, No. 111 / Thursday, June 9, 2011 / Rules and Regulations
[FR Doc. 2011–14282 Filed 6–8–11; 8:45 am]
BILLING CODE 6450–01–P
DEPARTMENT OF ENERGY
10 CFR Part 431
[Docket No. EERE–2008–BT–TP–0014]
RIN 1904–AB85
Energy Conservation Program: Test
Procedures for Walk-In Coolers and
Walk-In Freezers
Correction
In rule document 2011–8690
appearing on pages 21579–21612 in the
issue of Friday, April 15, 2011, the
regulatory text is being republished
below in its entirety due to errors in the
equations.
PART 431—[CORRECTED]
On page 21604, in the third column,
in the third paragraph from the top, the
regulatory text should read as set forth
below:
PART 431—ENERGY EFFICIENCY
PROGRAM FOR CERTAIN
COMMERCIAL AND INDUSTRIAL
EQUIPMENT
1. The authority citation for part 431
continues to read as follows:
■
Authority: 42 U.S.C. 6291–6317.
2. Section 431.302 is amended by
adding, in alphabetical order, new
definitions for ‘‘Display door,’’ ‘‘Display
panel,’’ ‘‘Door’’, ‘‘Envelope,’’ ‘‘K-factor,’’
‘‘Panel,’’ ‘‘Refrigerated,’’ ‘‘Refrigeration
system,’’ and ‘‘U-factor’’ to read as
follows:
■
§ 431.302 Definitions concerning walk-in
coolers and walk-in freezers.
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*
*
*
*
*
Display door means a door designed
for product movement, display, or both,
rather than the passage of persons.
Display panel means a panel that is
entirely or partially comprised of glass,
a transparent material, or both and is
used for display purposes.
Door means an assembly installed in
an opening on an interior or exterior
wall that is used to allow access or close
off the opening and that is movable in
a sliding, pivoting, hinged, or revolving
manner of movement. For walk-in
coolers and walk-in freezers, a door
includes the door panel, glass, framing
materials, door plug, mullion, and any
other elements that form the door or
part of its connection to the wall.
Envelope means—
(1) The portion of a walk-in cooler or
walk-in freezer that isolates the interior,
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refrigerated environment from the
ambient, external environment; and
(2) All energy-consuming components
of the walk-in cooler or walk-in freezer
that are not part of its refrigeration
system.
K-factor means the thermal
conductivity of a material.
*
*
*
*
*
Panel means a construction
component that is not a door and is
used to construct the envelope of the
walk-in, i.e., elements that separate the
interior refrigerated environment of the
walk-in from the exterior.
Refrigerated means held at a
temperature at or below 55 degrees
Fahrenheit using a refrigeration system.
Refrigeration system means the
mechanism (including all controls and
other components integral to the
system’s operation) used to create the
refrigerated environment in the interior
of a walk-in cooler or freezer, consisting
of:
(1) A packaged dedicated system
where the unit cooler and condensing
unit are integrated into a single piece of
equipment; or
(2) A split dedicated system with
separate unit cooler and condensing
unit sections; or
(3) A unit cooler that is connected to
a multiplex condensing system.
U-factor means the heat transmission
in a unit time through a unit area of a
specimen or product and its boundary
air films, induced by a unit temperature
difference between the environments on
each side.
*
*
*
*
*
■ 3. Section 431.303 is amended by:
■ a. Redesignating paragraph (b) as
paragraph (c);
■ b. Adding at the end of the sentence
in redesignated paragraph (c)(1), ‘‘and
Appendix A to Subpart R of Part 431’’.
■ c. Adding new paragraphs (b), (c)(2),
(d), and (e) to read as follows.
§ 431.303 Materials incorporated by
reference.
*
*
*
*
*
(b) AHRI. Air-Conditioning, Heating,
and Refrigeration Institute, 2111 Wilson
Boulevard, Suite 500, Arlington, VA
22201, (703) 600–0366, or https://
www.ahrinet.org.
(1) AHRI 1250 (I–P)–2009, (‘‘AHRI
1250’’), 2009 Standard for Performance
Rating of Walk-In Coolers and Freezers,
approved 2009, IBR approved for
§ 431.304.
(2) [Reserved]
(c) * * *
(2) ASTM C1363–05, (‘‘ASTM
C1363’’), Standard Test Method for
Thermal Performance of Building
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33631
Materials and Envelope Assemblies by
Means of a Hot Box Apparatus,
approved May 1, 2005, IBR approved for
Appendix A to Subpart R of part 431.
(d) CEN. European Committee for
Standardization (French: Norme or
German: Norm), Avenue Marnix 17, B–
1000 Brussels, Belgium, Tel: + 32 2 550
08 11, Fax: + 32 2 550 08 19 or https://
www.cen.eu/.
(1) DIN EN 13164:2009–02, (‘‘DIN EN
13164’’), Thermal insulation products
for buildings—Factory made products of
extruded polystyrene foam (XPS)—
Specification, approved February 2009,
IBR approved for Appendix A to
Subpart R of part 431.
(2) DIN EN 13165:2009–02, (‘‘DIN EN
13165’’), Thermal insulation products
for buildings—Factory made rigid
polyurethane foam (PUR) products—
Specification, approved February 2009,
IBR approved for Appendix A to
Subpart R of part 431.
(e) NFRC. National Fenestration
Rating Council, 6305 Ivy Lane, Ste. 140,
Greenbelt, MD 20770, (301) 589–1776,
or https://www.nfrc.org/.
(1) NFRC 100–2010[E0A1], (‘‘NFRC
100’’), Procedure for Determining
Fenestration Product U-factors,
approved June 2010, IBR approved for
Appendix A to Subpart R of part 431.
(2) [Reserved]
■ 4. Section 431.304 is amended by
redesignating paragraphs (b)(2), (b)(3),
(b)(4), and (b)(5) as (b)(1), (b)(2), (b)(3),
and (b)(4), respectively, and by adding
new paragraphs (b)(5), (b)(6), (b)(7), and
(b)(8) to read as follows.
§ 431.304 Uniform test method for the
measurement of energy consumption of
walk-in coolers and walk-in freezers.
*
*
*
*
*
(b) * * *
(5) Determine the U-factor,
conduction load, and energy use of
walk-in cooler and walk-in freezer
display panels, floor panels, and nonfloor panels by conducting the test
procedure set forth in Appendix A to
this subpart, sections 4.1, 4.2, and 4.3,
respectively.
(6) Determine the energy use of walkin cooler and walk-in freezer display
doors and non-display doors by
conducting the test procedure set forth
in Appendix A to this subpart, sections
4.4 and 4.5, respectively.
(7) Determine the Annual Walk-in
Energy Factor of walk-in cooler and
walk-in freezer refrigeration systems by
conducting the test procedure set forth
in AHRI 1250 (incorporated by
reference; see § 431.303).
(8) Determine the annual energy
consumption of walk-in cooler and
walk-in freezer refrigeration systems:
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where tj and n represent the outdoor
temperature at each bin j and the number
of hours in each bin j, respectively, for
the temperature bins listed in Table D1
of AHRI 1250.
˙
˙
where BLH and BLL for refrigerator and
freezer systems are defined in sections
6.2.1 and 6.2.2, respectively, of AHRI
1250 and the annual walk-in energy
factor is calculated from the results of
˙
˙
where BLH and BLL for refrigerator and
freezer systems are defined in section
7.9.2.2 and 7.9.2.3, respectively, of AHRI
1250 and the annual walk-in energy
factor is calculated from the results of
the test procedures set forth in AHRI
1250.
5. Appendix A to subpart R of part
431 is added to read as follows:
■
Appendix A to Subpart R of Part 431—
Uniform Test Method for the
Measurement of Energy Consumption of
the Components of Envelopes of WalkIn Coolers and Walk-In Freezers
1.0 Scope
This appendix covers the test requirements
used to measure the energy consumption of
the components that make up the envelope
of a walk-in cooler or walk-in freezer.
2.0 Definitions
The definitions contained in § 431.302 are
applicable to this appendix.
(ii) For systems consisting of a
packaged dedicated system or a split
the test procedures set forth in AHRI
1250.
(iii) For systems consisting of a single
unit cooler or a set of multiple unit
3.0
Additional Definitions
3.1 Automatic door opener/closer means
a device or control system that
‘‘automatically’’ opens and closes doors
without direct user contact, such as a motion
sensor that senses when a forklift is
approaching the entrance to a door and opens
it, and then closes the door after the forklift
has passed.
3.2 Core region means the part of the
panel that is not the edge region.
3.3 Edge region means a region of the
panel that is wide enough to encompass any
framing members and edge effects. If the
panel contains framing members (e.g. a wood
frame) then the width of the edge region must
be as wide as any framing member plus 2 in.
± 0.25 in. If the panel does not contain
framing members then the width of the edge
region must be 4 in ± 0.25 in. For walk-in
panels that utilize vacuum insulated panels
(VIP) for insulation, the width of the edge
region must be the lesser of 4.5 in. ± 1 in.
or the maximum width that does not cause
consumption term in the equation for
annual walk-in energy factor in section
7 of AHRI 1250:
dedicated system where the condensing
unit is located in a conditioned space,
by performing the following calculation:
coolers serving a single piece of
equipment and connected to a multiplex
condensing system, by performing the
following calculation:
the VIP to be pierced by the cutting device
when the edge region is cut.
3.4 Surface area means the area of the
surface of the walk-in component that would
be external to the walk-in. For example, for
panel, the surface area would be the area of
the side of the panel that faces the outside
of the walk-in. It would not include edges of
the panel that are not exposed to the outside
of the walk-in.
3.5 Rating conditions means, unless
explicitly stated otherwise, all conditions
shown in Table A.1. For installations where
two or more walk-in envelope components
share any surface(s), the ‘‘external
conditions’’ of the shared surface(s) must
reflect the internal conditions of the adjacent
walk-in. For example, if a walk-in component
divides a walk-in freezer from a walk-in
cooler, then the internal conditions are the
freezer rating conditions and the external
conditions are the cooler rating conditions.
3.6 Percent time off (PTO) means the
percent of time that an electrical device is
assumed to be off.
TABLE A.1—TEMPERATURE CONDITIONS
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Internal Temperatures (cooled space within the envelope)
Cooler Dry Bulb Temperature ................................................................................................................................................................
Freezer Dry Bulb Temperature ..............................................................................................................................................................
35 °F.
¥10 °F.
External Temperatures (space external to the envelope)
Freezer and Cooler Dry Bulb Temperatures .........................................................................................................................................
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75 °F.
ER09JN11.002</GPH>
unit is located outdoors, by conducting
the test procedure set forth in AHRI
1250 and recording the annual energy
ER09JN11.001</GPH>
(i) For systems consisting of a
packaged dedicated system or a split
dedicated system, where the condensing
ER09JN11.000</GPH>
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33633
TABLE A.1—TEMPERATURE CONDITIONS—Continued
Subfloor Temperatures
Freezer and Cooler Dry Bulb Temperatures .........................................................................................................................................
55 °F.
(a) Calculate the U-factor of the display
panel in accordance with section 5.3 of this
appendix, Btu/h-ft2-°F.
(b) Calculate the display panel surface area,
as defined in section 3.4 of this appendix,
Adp, ft2, with standard geometric formulas or
engineering software.
(c) Calculate the temperature differential,
DTdp, °F, for the display panel, as follows:
Where:
TDB,ext,dp = dry-bulb air external temperature,
°F, as prescribed in Table A.1; and
TDB,int,dp = dry-bulb air temperature internal
to the cooler or freezer, °F, as prescribed
in Table A.1.
(d) Calculate the conduction load
through the display panel, Qcond-dp, Btu/
h, as follows:
Where:
Adp = surface area of the walk-in display
panel, ft2;
DTdp= temperature differential between
refrigerated and adjacent zones, °F; and
Udp = thermal transmittance, U-factor, of the
display panel in accordance with section
5.3 of this appendix, Btu/h-ft2-°F.
(1) For coolers, use EER = 12.4 Btu/
W-h
(2) For freezers, use EER = 6.3 Btu/Wh
(f) Calculate the total daily energy
consumption, Edp, kWh/day, as follows:
Where:
Qcond, dp = the conduction load through the
display panel, Btu/h; and EER = EER of
walk-in (cooler or freezer), Btu/W-h.
software as directed in section 5.1 of
this appendix.
(b) Calculate the surface area, as
defined in section 3.4 of this appendix,
of the floor panel core, as defined in
section 3.2, Afp core, ft2, with standard
geometric formulas or engineering
software as directed in section 5.1 of
this appendix.
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(e) Calculate the floor foam
degradation factor, DFfp, unitless, as
follows:
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Where:
RLTTR,fp = the long term thermal resistance Rvalue of the floor panel foam in
accordance with section 5.2 of this
appendix, h-ft2-°F/Btu; and
Ro,fp = the R-value of foam determined in
accordance with ASTM C518
(incorporated by reference; see section
§ 431.303) for purposes of compliance
with the appropriate energy conservation
standard, h-ft2-°F/Btu.
(f) Calculate the U-factor for panel
core region modified by the long term
thermal transmittance of foam, ULT,fp
2
core, Btu/h-ft -°F, as follows:
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ER09JN11.009</GPH>
(d) Calculate the temperature
differential of the floor panel, DTfp, °F,
as follows:
ER09JN11.008</GPH>
Where:
Afp core = floor panel core area, ft2; and
Afp edge = floor panel edge area, ft2.
ER09JN11.007</GPH>
Where:
Text, fp = subfloor temperature, °F, as
prescribed in Table A.1; and
TDB,int, fp = dry-bulb air internal temperature,
°F, as prescribed in Table A.1. If the
panel spans both cooler and freezer
temperatures, the freezer temperature
must be used.
(c) Calculate the total area of the floor
panel, Afp, ft2, as follows:
Where:
Ufp core = the U-factor in accordance with
section 5.1 of this appendix, Btu/h-ft2-°F;
and
DFfp = floor foam degradation factor, unitless.
(g) Calculate the overall U-factor of
the floor panel, Ufp, Btu/h-ft2-°F, as
follows:
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ER09JN11.006</GPH>
Floor Panels
(a) Calculate the surface area, as
defined in section 3.4 of this appendix,
of the floor panel edge, as defined in
section 3.3, Afp edge, ft2, with standard
geometric formulas or engineering
(e) Select Energy Efficiency Ratio
(EER), as follows:
ER09JN11.005</GPH>
4.2
Display Panels
ER09JN11.004</GPH>
4.1
Calculation Instructions
ER09JN11.003</GPH>
4.0
Federal Register / Vol. 76, No. 111 / Thursday, June 9, 2011 / Rules and Regulations
(i) Select Energy Efficiency Ratio
(EER), as follows:
(1) For coolers, use EER = 12.4 Btu/
W-h
Where:
Qcond-fp = the conduction load through the
floor panel, Btu/h; and EER = EER of
walk-in (cooler or freezer), Btu/W-h.
formulas or engineering software as
directed in section 5.1 of this appendix.
(b) Calculate the surface area, as
defined in section 3.4, of the non-floor
panel core, as defined in section 3.2, Anf
2,
core, ft with standard geometric
formulas or engineering software as
directed in section 5.1 of this appendix.
4.3 Non-Floor Panels
(a) Calculate the surface area, as
defined in section 3.4, of the non-floor
panel edge, as defined in section 3.3, Anf
2
edge, ft , with standard geometric
Where:
TDB,ext, nf = dry-bulb air external temperature,
°F, as prescribed in Table A.1; and
TDB,int, nf = dry-bulb air internal temperature,
°F, as prescribed in Table A.1. If the nonfloor panel spans both cooler and freezer
temperatures, then the freezer
temperature must be used.
(e) Calculate the non-floor foam
degradation factor, DFnf, unitless, as
follows:
Where:
RLTTR,nf = the R-value of the non-floor panel
foam in accordance with section 5.2 of
this appendix, h- ft2-°F/Btu; and
Ro,nf = the R-value of foam determined in
accordance with ASTM C518
(incorporated by reference; see section
§ 431.303) for purposes of compliance
with the appropriate energy conservation
standard, h-ft2-°F/Btu.
(j) Calculate the total daily energy
consumption, Efp, kWh/day, as follows:
(c) Calculate total non-floor panel
area, Anf, ft2:
Where:
Anf edge = non-floor panel edge area, ft2; and
Anf core = non-floor panel core area, ft2.
(d) Calculate temperature differential,
DTnf, °F:
Where:
Unf core = the U-factor, in accordance with
section 5.1 of this appendix, of non-floor
panel, Btu/h- ft2-°F; and
DFnf = the non-floor foam degradation factor,
unitless.
(g) Calculate the overall U-factor of
the non-floor panel, Unf, Btu/h-ft2-°F, as
follows:
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(h) Calculate the conduction load
through non-floor panels, Qcond-nf, Btu/h,
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ER09JN11.012</GPH>
Anf core = area of non-floor panel core, ft2;
ULT,nf core = U-factor for non-floor panel core
region modified by the long term thermal
transmittance of foam, Btu/h-ft2-°F; and
Anf = total area of the non- floor panel, ft2.
ER09JN11.011</GPH>
Where:
Anf edge = area of non-floor panel edge, ft2;
Unf edge = U-factor for non-floor panel edge
area in accordance with section 5.1 of
this appendix, Btu/h-ft2-°F;
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ER09JN11.010</GPH>
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ER09JN11.013</GPH>
(f) Calculate the U-factor, ULT,nf core,
Btu/h-ft2-°F, as follows:
(2) For freezers, use EER = 6.3 Btu/Wh
ER09JN11.017</GPH>
Where:
DTfp = temperature differential across the
floor panels, °F;
Afp = total area of the floor panel, ft2; and
Ufp = overall U-factor of the floor panel, Btu/
h-ft2-°F.
(h) Calculate the conduction load
through floor panels, Qcond-fp, Btu/h,
ER09JN11.016</GPH>
Afp core = area of floor panel core, ft2;
ULT,fp core = U-factor for panel core region
modified by the long term thermal
transmittance of foam, Btu/h-ft2-°F; and
Afp = total area of the floor panel, ft2.
ER09JN11.015</GPH>
Where:
Afp edge = area of floor panel edge, ft2;
Ufp edge = U-factor for panel edge area in
accordance with section 5.1 of this
appendix, Btu/h-ft2-°F;
ER09JN11.014</GPH>
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33635
Where:
DTnf = temperature differential across the
non-floor panels, °F;
Anf = total area of the non-floor panel, ft2; and
Unf = overall U-factor of the non-floor panel,
Btu/h-ft2-°F.
(i) Select Energy Efficiency Ratio
(EER), as follows:
(1) For coolers, use EER = 12.4 Btu/
W-h
Where:
Qcond-nf = the conduction load through the
non-floor panel, Btu/h; and
EER = EER of walk-in (cooler or freezer), Btu/
W-h.
4.4
Where:
TDB,ext, dd = dry-bulb air temperature external
to the display door, °F, as prescribed in
Table A.1; and
TDB,int, dd = dry-bulb air temperature internal
to the display door, °F, as prescribed in
Table A.1.
(d) Calculate the conduction load
through the display doors, Qcond-dd, Btu/
h, as follows:
Where:
DTdd = temperature differential between
refrigerated and adjacent zones, °F;
Add = surface area walk-in display doors, ft2;
and
Udd = thermal transmittance, U-factor of the
door, in accordance with section 5.3 of
this appendix, Btu/h-ft2-°F.
Electrical components associated with
display doors could include, but are not
limited to: heater wire (for anti-sweat or
anti-freeze application); lights
(including display door lighting
systems); control system units; and
sensors.
(a) Select the required value for
percent time off (PTO) for each type of
electricity consuming device, PTOt (%)
(1) For lights without timers, control
system or other demand-based control,
PTO = 25 percent. For lighting with
timers, control system or other demandbased control, PTO = 50 percent.
(2) For anti-sweat heaters on coolers
(if included): Without timers, control
system or other demand-based control,
PTO = 0 percent. With timers, control
system or other demand-based control,
PTO = 75 percent. For anti-sweat
heaters on freezers (if included):
Without timers, control system or other
auto-shut-off systems, PTO = 0 percent.
With timers, control system or other
demand-based control, PTO = 50
percent.
(3) For all other electricity consuming
devices: Without timers, control system,
or other auto-shut-off systems, PTO = 0
percent. If it can be demonstrated that
the device is controlled by a
preinstalled timer, control system or
other auto-shut-off system, PTO = 25
percent.
(b) Calculate the power usage for each
type of electricity consuming device,
Pdd-comp,u,t, kWh/day, as follows:
Where:
u = the index for each of type of electricityconsuming device located on either (1)
the interior facing side of the display
door or within the inside portion of the
display door, (2) the exterior facing side
of the display door, or (3) any
combination of (1) and (2). For purposes
of this calculation, the interior index is
represented by u = int and the exterior
index is represented by u = ext. If the
electrical component is both on the
interior and exterior side of the display
door then u = int. For anti-sweat heaters
sited anywhere in the display door, 75
percent of the total power is be attributed
to u = int and 25 percent of the total
power is attributed to u = ext;
t = index for each type of electricity
consuming device with identical rated
power;
Prated,u,t = rated power of each component, of
type t, kW;
PTOu,t = percent time off, for device of type
t, %; and
nu,t = number of devices at the rated power
of type t, unitless.
(a) Calculate the U-factor of the door
in accordance with section 5.3 of this
appendix, Btu/h-ft2-°F
(b) Calculate the surface area, as
defined in section 3.4 of this appendix,
of the display door, Add, ft2, with
standard geometric formulas or
engineering software.
(c) Calculate the temperature
differential, DTdd, °F, for the display
door as follows:
ER09JN11.022</GPH>
4.4.1 Conduction Through Display
Doors
(j) Calculate the total daily energy
consumption, Enf, kWh/day, as follows:
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ER09JN11.019</GPH>
(c) Calculate the total electrical energy
consumption for interior and exterior
power, Pdd-tot, int (kWh/day) and Pdd-tot, ext
(kWh/day), respectively, as follows:
ER09JN11.018</GPH>
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ER09JN11.021</GPH>
4.4.2 Direct Energy Consumption of
Electrical Component(s) of Display
Doors
Display Doors
(2) For freezers, use EER = 6.3 Btu/Wh
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external facing side of the display door,
of type t, kWh/day.
Where:
t = index for each type of electricity
consuming device with identical rated
power;
Pdd-comp,int, t = the energy usage for an
electricity consuming device sited on the
interior facing side of or in the display
door, of type t, kWh/day; and
Pdd-comp,ext, t = the energy usage for an
electricity consuming device sited on the
(d) Calculate the total electrical
energy consumption, Pdd-tot, (kWh/day),
as follows:
Where:
Pdd-tot,int = the total interior electrical energy
usage for the display door, kWh/day; and
Pdd-tot,ext = the total exterior electrical energy
usage for the display door, kWh/day.
4.4.3 Total Indirect Electricity
Consumption Due to Electrical Devices
(a) Select Energy Efficiency Ratio
(EER), as follows:
(1) For coolers, use EER = 12.4 Btu/
Wh
(2) For freezers, use EER = 6.3 Btu/Wh
(b) Calculate the additional
refrigeration energy consumption due to
thermal output from electrical
components sited inside the display
door, Cdd-load, kWh/day, as follows:
Where:
EER = EER of walk-in cooler or walk-in
freezer, Btu/W-h; and
Pdd-tot,int = The total internal electrical energy
consumption due for the display door,
kWh/day.
4.4.4 Total Display Door Energy
Consumption
(a) Select Energy Efficiency Ratio
(EER), as follows:
(1) For coolers, use EER = 12.4 Btu/
W-h
Where:
TDB,ext, nd = dry-bulb air external temperature,
°F, as prescribed by Table A.1; and
4.5.1 Conduction Through NonDisplay Doors
(a) Calculate the surface area, as
defined in section 3.4 of this appendix,
TDB,int, nd = dry-bulb air internal temperature,
°F, as prescribed by Table A.1. If the
component spans both cooler and freezer
spaces, the freezer temperature must be
used.
PO 00000
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Fmt 4700
Sfmt 4700
(c) Calculate the conduction load
through the non-display door: Qcond-nd,
Btu/h,
E:\FR\FM\09JNR1.SGM
09JNR1
ER09JN11.028</GPH>
ER09JN11.027</GPH>
Non-Display Doors
of the non-display door, And, ft2, with
standard geometric formulas or with
engineering software.
(b) Calculate the temperature
differential of the non-display door,
DTnd,°F, as follows:
ER09JN11.026</GPH>
4.5
(c) Calculate the total energy, Edd,tot,
kWh/day,
ER09JN11.025</GPH>
mstockstill on DSK4VPTVN1PROD with RULES
Edd, thermal = the total daily energy
consumption due to thermal load for the
display door, kWh/day;
Pdd-tot = the total electrical load, kWh/day;
and
Cdd-load = additional refrigeration load due to
thermal output from electrical
Jkt 223001
(4-25)
components contained within the
display door, kWh/day.
Where:
16:22 Jun 08, 2011
24 h × 1 kW
1 day × 1000 W
EER = EER of walk-in (cooler or freezer), Btu/
W-h.
Qcond, dd = the conduction load through the
display door, Btu/h; and
VerDate Mar<15>2010
EER
×
ER09JN11.024</GPH>
Where:
Qcond,dd
(b) Calculate the total daily energy
consumption due to conduction thermal
load, Edd, thermal, kWh/day, as follows:
ER09JN11.023</GPH>
E dd,thermal =
(2) For freezers, use EER = 6.3 Btu/Wh
Federal Register / Vol. 76, No. 111 / Thursday, June 9, 2011 / Rules and Regulations
t = index for each type of electricity
consuming device with identical rated
power;
Prated,u,t = rated power of each component, of
type t, kW;
PTOu,t = percent time off, for device of type
t, %; and
nu,t = number of devices at the rated power
of type t, unitless.
Where:
t = index for each type of electricity
consuming device with identical rated
power;
Pnd-comp,int, t = the energy usage for an
electricity consuming device sited on the
internal facing side or internal to the
non-display door, of type t, kWh/day;
and
Pnd-comp,ext, t = the energy usage for an
electricity consuming device sited on the
external facing side of the non-display
door, of type t, kWh/day. For anti-sweat
heaters,
(c) Calculate the total electrical energy
consumption for interior and exterior
power, Pnd-tot, int (kWh/day) and Pnd-tot, ext
(kWh/day), respectively, as follows:
mstockstill on DSK4VPTVN1PROD with RULES
Where:
Pnd-tot,int = the total interior electrical energy
usage for the non-display door, of type
t, kWh/day; and
Pnd-tot,ext = the total exterior electrical energy
usage for the non-display door, of type
t, kWh/day.
4.5.3 Total Indirect Electricity
Consumption Due to Electrical Devices
Where:
EER = EER of walk-in cooler or freezer, Btu/
W-h; and
Pnd-tot,int = the total interior electrical energy
consumption for the non-display door,
kWh/day.
4.5.4 Total Non-Display Door Energy
Consumption
(a) Select Energy Efficiency Ratio
(EER), as follows:
(1) For coolers, use EER = 12.4 Btu/
W-h
VerDate Mar<15>2010
16:22 Jun 08, 2011
Jkt 223001
(a) Select Energy Efficiency Ratio
(EER), as follows:
(1) For coolers, use EER = 12.4 Btu/
Wh
PO 00000
Frm 00023
Fmt 4700
Sfmt 4700
(2) For freezers, use EER = 6.3 Btu/Wh
(b) Calculate the additional
refrigeration energy consumption due to
thermal output from electrical
components associated with the nondisplay door, Cnd-load, kWh/day, as
follows:
(2) For freezers, use EER = 6.3 Btu/Wh
(b) Calculate the total daily energy
consumption due to thermal load, End,
thermal, kWh/day, as follows:
E:\FR\FM\09JNR1.SGM
09JNR1
ER09JN11.033</GPH>
(d) Calculate the total electrical
energy consumption, Pnd-tot, kWh/day,
as follows:
ER09JN11.032</GPH>
Where:
u = the index for each of type of electricityconsuming device located on either (1)
the interior facing side of the display
door or within the inside portion of the
display door, (2) the exterior facing side
of the display door, or (3) any
combination of (1) and (2). For purposes
of this calculation, the interior index is
represented by u = int and the exterior
index is represented by u = ext. If the
electrical component is both on the
interior and exterior side of the display
door then u = int. For anti-sweat heaters
sited anywhere in the display door, 75
percent of the total power is be attributed
to u=int and 25 percent of the total
power is attributed to u=ext;
ER09JN11.031</GPH>
Electrical components associated with
a walk-in non-display door comprise
any components that are on the nondisplay door and that directly consume
electrical energy. This includes, but is
not limited to, heater wire (for anti-
heaters on freezers (if included):
Without timers, control system or other
auto-shut-off systems, PTO = 0 percent.
With timers, control system or other
demand-based control, PTO = 50
percent.
(3) For all other electricity consuming
devices: Without timers, control system,
or other auto-shut-off systems, PTO = 0
percent. If it can be demonstrated that
the device is controlled by a
preinstalled timer, control system or
other auto-shut-off system, PTO = 25
percent.
(b) Calculate the power usage for each
type of electricity consuming device,
Pnd-comp,u,t, kWh/day, as follows:
ER09JN11.030</GPH>
4.5.2 Direct Energy Consumption of
Electrical Components of Non-Display
Doors
sweat or anti-freeze application), control
system units, and sensors.
(a) Select the required value for
percent time off for each type of
electricity consuming device, PTOt (%)
(1) For lighting without timers,
control system or other demand-based
control, PTO = 25 percent. For lighting
with timers, control system or other
demand-based control, PTO = 50
percent.
(2) For anti-sweat heaters on coolers
(if included): Without timers, control
system or other demand-based control,
PTO = 0 percent. With timers, control
system or other demand-based control,
PTO = 75 percent. For anti-sweat
ER09JN11.029</GPH>
Where:
DTnd = temperature differential across the
non-display door, °F;
Und = thermal transmittance, U-factor of the
door, in accordance with section 5.3 of
this appendix, Btu/h-ft2-°F; and
And = area of non-display door, ft2.
33637
33638
Federal Register / Vol. 76, No. 111 / Thursday, June 9, 2011 / Rules and Regulations
Where:
Qcond-nd = the conduction load through the
non-display door, Btu/hr; and
EER = EER of walk-in (cooler or freezer), Btu/
W-h.
(c) Calculate the total energy, End,tot,
kWh/day, as follows:
Where:
End, thermal = the total daily energy
consumption due to thermal load for the
non-display door, kWh/day;
Pnd-tot = the total electrical energy
consumption, kWh/day; and
Cnd-load = additional refrigeration load due to
thermal output from electrical
components contained on the inside face
of the non-display door, kWh/day.
(1) Test Sample Geometry Requirements
(i) Two (2) panels, 8 ft. ± 1 ft. long and
4 ft. ± 1 ft. wide must be used.
(ii) The panel edges must be joined
using the manufacturer’s panel interface
joining system (e.g., camlocks, standard
gasketing, etc.).
(iii) The Panel Edge Test Region, see
figure 1, must be cut using the following
dimensions:
1. If the panel contains framing
members (e.g. a wood frame), then the
width of edge (W) must be as wide as
any framing member plus 2 in. ± 0.25 in.
For example, if the face of the panel
contains 1.5 in. thick framing members
around the edge of the panel, then
width of edge (W) = 3.5 in. ± 0.25 in and
the Panel Edge Test Region would be 7
in. ± 0.5 in. wide.
2. If the panel does not contain
framing members, then the width of
edge (W) must be 4 in ± 0. 25 in.
3. Walk-in panels that utilize vacuum
insulated panels (VIP) for insulation,
width of edge (W) = the lesser of 4.5 in.
± 1 in. or the maximum width that does
not cause the VIP to be pierced by the
cutting device when the edge region is
cut.
(iv) Panel Core Test Region of length
Y and height Z, see Figure 1, must also
be cut from one of the two panels such
that panel length = Y + X, panel height
= Z +X where X=2W.
non-floor panel should be maintained at
75 °F ± 1 °F.
1. Exception: When testing floor
panels, the air temperature should be
maintained at 55 °F ± 1 °F.
5.0
Test Methods and Measurements
5.1 Measuring Floor and Non-floor
Panel U-factors
ER09JN11.036</GPH>
(i) The air temperature on the ‘‘hot
side’’, as denoted in ASTM C1363, of the
VerDate Mar<15>2010
16:22 Jun 08, 2011
Jkt 223001
PO 00000
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Fmt 4700
Sfmt 4700
E:\FR\FM\09JNR1.SGM
09JNR1
ER09JN11.035</GPH>
(2) Testing Conditions
ER09JN11.034</GPH>
mstockstill on DSK4VPTVN1PROD with RULES
Follow the test procedure in ASTM
C1363, (incorporated by reference; see
§ 431.303), exactly, with these
exceptions:
Federal Register / Vol. 76, No. 111 / Thursday, June 9, 2011 / Rules and Regulations
(ii) The temperature on the ‘‘cold
side’’, as denoted in ASTM C1363, of the
panel should be maintained at 35 °F ±
1 °F for the panels used for walk-in
coolers and ¥10 °F ± 1 °F for panels
used for walk-in freezers.
(iii) The air velocity must be
maintained as natural convection
conditions as described in ASTM
C1363. The test must be completed
using the masked method and with
surround panel in place as described in
ASTM C1363.
(3) Required Test Measurements
(i) Non-floor Panels
1. Panel Edge Region U-factor: Unf, edge
2. Panel Core Region U-factor: Unf, core
(ii) Floor Panels
1. Floor Panel Edge Region U-factor:
Ufp, edge
2. Floor Panel Core Region U-factor:
Ufp, core
5.2 Measuring Long Term Thermal
Resistance (LTTR) of Insulating Foam
Follow the test procedure in Annex C
of DIN EN 13164 or Annex C of DIN EN
13165 (as applicable), (incorporated by
reference; see § 431.303), exactly, with
these exceptions:
(1) Temperatures During Thermal
Resistance Measurement
(i) For freezers: 20 °F ± 1 °F must be
used.
(ii) For coolers: 55 °F ± 1 °F must be
used.
(2) Sample Panel Preparation
(i) A 800mm × 800mm square (×
thickness of the panel) section cut from
the geometric center of the panel that is
being tested must be used as the sample
for completing DIN EN 13165.
(ii) A 500mm × 500mm square
(× thickness of the panel) section cut
from the geometric center of the panel
that is being tested must be used as the
sample for completing DIN EN 13164.
mstockstill on DSK4VPTVN1PROD with RULES
(3) Required Test Measurements
(i) Non-floor Panels
1. Long Term Thermal Resistance:
RLTTR,nf
(ii) Floor Panels
1. Long Term Thermal Resistance:
RLTTR,fp
16:22 Jun 08, 2011
Jkt 223001
[FR Doc. C1–2011–8690 Filed 6–8–11; 8:45 am]
BILLING CODE 1505–01–D
DEPARTMENT OF HOMELAND
SECURITY
Coast Guard
33 CFR Part 165
[Docket No. USCG–2011–0222]
RIN 1625–AA00
Safety Zone; New York Water Taxi 10th
Anniversary Fireworks, Upper New
York Bay, Red Hook, NY
Coast Guard, DHS.
Temporary Final rule.
AGENCY:
ACTION:
The Coast Guard is
establishing a temporary safety zone in
the Captain of the Port (COTP) Zone
New York on the navigable waters of the
Upper New York Bay in the vicinity of
Red Hook, New York for a fireworks
display. This temporary safety zone is
necessary to ensure the safety of vessels
and spectators from hazards associated
with fireworks displays. Persons and
vessels are prohibited from entering
into, transiting through, mooring, or
anchoring within the temporary safety
zone unless authorized by the COTP
New York or the designated on-scene
representative.
SUMMARY:
This rule is effective from 8:30
p.m. until 10 p.m. on June 21, 2011.
ADDRESSES: Documents indicated in this
preamble as being available in the
docket are part of docket USCG–2011–
0222 and are available online by going
to https://www.regulations.gov, inserting
USCG–2011–0222 in the ‘‘Keyword’’
box, and then clicking ‘‘Search.’’ They
are also available for inspection or
copying at the Docket Management
Facility (M–30), U.S. Department of
DATES:
5.3 U-factor of Doors and Display
Panels
(a) Follow the procedure in NFRC
100, (incorporated by reference; see
§ 431.303), exactly, with these
exceptions:
(1) The average convective heat
transfer coefficient on both interior and
exterior surfaces of the door should be
based on the coefficients described in
section 4.3 of NFRC 100.
VerDate Mar<15>2010
(2) Internal conditions:
(i) Air temperature of 35 °F (1.7 °C) for
cooler doors and ¥10 °F (¥23.3 °C) for
freezer doors
(ii) Mean inside radiant temperature
must be the same as shown in section
5.3(a)(2)(i), above.
(3) External conditions
(i) Air temperature of 75 °F (23.9 °C)
(ii) Mean outside radiant temperature
must be the same as section 5.3(a)(3)(i),
above.
(4) Direct solar irradiance = 0 W/m2
(Btu/h-ft2).
(b) Required Test Measurements
(i) Display Doors and Display Panels
1. Thermal Transmittance: Udd
(ii) Non-Display Door
1. Thermal Transmittance: Und
PO 00000
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33639
Transportation, West Building Ground
Floor, Room W12–140, 1200 New Jersey
Avenue, SE., Washington, DC 20590,
between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
If
you have questions on this temporary
rule, call or e-mail LTJG Eunice James,
Coast Guard Sector New York
Waterways Management Division; 718–
354–4163, e-mail
Eunice.A.James@uscg.mil. If you have
questions on viewing the docket, call
Renee V. Wright, Program Manager,
Docket Operations, telephone 202–366–
9826.
FOR FURTHER INFORMATION CONTACT:
SUPPLEMENTARY INFORMATION:
Regulatory Information
The Coast Guard is issuing this
temporary final rule without prior
notice and opportunity to comment
pursuant to authority under section 4(a)
of the Administrative Procedure Act
(APA) (5 U.S.C. 553(b)). This provision
authorizes an agency to issue a rule
without prior notice and opportunity to
comment when the agency for good
cause finds that those procedures are
‘‘impracticable, unnecessary, or contrary
to the public interest.’’ Under 5 U.S.C.
553(b)(B), the Coast Guard finds that
good cause exists for not publishing a
notice of proposed rulemaking (NPRM)
with respect to this rule because the
Coast Guard did not receive information
regarding the dates and scope of the
event in time to publish a NPRM
followed by a final rule before the
effective date. The sponsor was not
aware of the requirements for
submitting an application for a marine
event 135 days in advance, resulting in
a late notification. The sponsor is now
aware of this requirement for all future
events. Nevertheless, the sponsor is
unable to reschedule this event due to
other activities being held in
conjunction with the fireworks display.
The safety zone is necessary to provide
for the safety of event participants,
spectator craft, and other vessels
operating near the event area. For the
safety concerns noted, it is in the public
interest to have these regulations in
effect during the event.
Under 5 U.S.C. 553(d)(3), the Coast
Guard finds that good cause exists for
making this rule effective less than 30
days after publication in the Federal
Register. The rule must become
effective on the date specified above in
order to provide for the safety of the
public including spectators and vessels
operating in the area near the fireworks
display.
E:\FR\FM\09JNR1.SGM
09JNR1
]]>Agencies
[Federal Register Volume 76, Number 111 (Thursday, June 9, 2011)]
[Rules and Regulations]
[Pages 33631-33639]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: C1-2011-8690]
-----------------------------------------------------------------------
DEPARTMENT OF ENERGY
10 CFR Part 431
[Docket No. EERE-2008-BT-TP-0014]
RIN 1904-AB85
Energy Conservation Program: Test Procedures for Walk-In Coolers
and Walk-In Freezers
Correction
In rule document 2011-8690 appearing on pages 21579-21612 in the
issue of Friday, April 15, 2011, the regulatory text is being
republished below in its entirety due to errors in the equations.
PART 431--[CORRECTED]
On page 21604, in the third column, in the third paragraph from the
top, the regulatory text should read as set forth below:
PART 431--ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND
INDUSTRIAL EQUIPMENT
0
1. The authority citation for part 431 continues to read as follows:
Authority: 42 U.S.C. 6291-6317.
0
2. Section 431.302 is amended by adding, in alphabetical order, new
definitions for ``Display door,'' ``Display panel,'' ``Door'',
``Envelope,'' ``K-factor,'' ``Panel,'' ``Refrigerated,''
``Refrigeration system,'' and ``U-factor'' to read as follows:
Sec. 431.302 Definitions concerning walk-in coolers and walk-in
freezers.
* * * * *
Display door means a door designed for product movement, display,
or both, rather than the passage of persons.
Display panel means a panel that is entirely or partially comprised
of glass, a transparent material, or both and is used for display
purposes.
Door means an assembly installed in an opening on an interior or
exterior wall that is used to allow access or close off the opening and
that is movable in a sliding, pivoting, hinged, or revolving manner of
movement. For walk-in coolers and walk-in freezers, a door includes the
door panel, glass, framing materials, door plug, mullion, and any other
elements that form the door or part of its connection to the wall.
Envelope means--
(1) The portion of a walk-in cooler or walk-in freezer that
isolates the interior, refrigerated environment from the ambient,
external environment; and
(2) All energy-consuming components of the walk-in cooler or walk-
in freezer that are not part of its refrigeration system.
K-factor means the thermal conductivity of a material.
* * * * *
Panel means a construction component that is not a door and is used
to construct the envelope of the walk-in, i.e., elements that separate
the interior refrigerated environment of the walk-in from the exterior.
Refrigerated means held at a temperature at or below 55 degrees
Fahrenheit using a refrigeration system.
Refrigeration system means the mechanism (including all controls
and other components integral to the system's operation) used to create
the refrigerated environment in the interior of a walk-in cooler or
freezer, consisting of:
(1) A packaged dedicated system where the unit cooler and
condensing unit are integrated into a single piece of equipment; or
(2) A split dedicated system with separate unit cooler and
condensing unit sections; or
(3) A unit cooler that is connected to a multiplex condensing
system.
U-factor means the heat transmission in a unit time through a unit
area of a specimen or product and its boundary air films, induced by a
unit temperature difference between the environments on each side.
* * * * *
0
3. Section 431.303 is amended by:
0
a. Redesignating paragraph (b) as paragraph (c);
0
b. Adding at the end of the sentence in redesignated paragraph (c)(1),
``and Appendix A to Subpart R of Part 431''.
0
c. Adding new paragraphs (b), (c)(2), (d), and (e) to read as follows.
Sec. 431.303 Materials incorporated by reference.
* * * * *
(b) AHRI. Air-Conditioning, Heating, and Refrigeration Institute,
2111 Wilson Boulevard, Suite 500, Arlington, VA 22201, (703) 600-0366,
or https://www.ahrinet.org.
(1) AHRI 1250 (I-P)-2009, (``AHRI 1250''), 2009 Standard for
Performance Rating of Walk-In Coolers and Freezers, approved 2009, IBR
approved for Sec. 431.304.
(2) [Reserved]
(c) * * *
(2) ASTM C1363-05, (``ASTM C1363''), Standard Test Method for
Thermal Performance of Building Materials and Envelope Assemblies by
Means of a Hot Box Apparatus, approved May 1, 2005, IBR approved for
Appendix A to Subpart R of part 431.
(d) CEN. European Committee for Standardization (French: Norme or
German: Norm), Avenue Marnix 17, B-1000 Brussels, Belgium, Tel: + 32 2
550 08 11, Fax: + 32 2 550 08 19 or https://www.cen.eu/.
(1) DIN EN 13164:2009-02, (``DIN EN 13164''), Thermal insulation
products for buildings--Factory made products of extruded polystyrene
foam (XPS)--Specification, approved February 2009, IBR approved for
Appendix A to Subpart R of part 431.
(2) DIN EN 13165:2009-02, (``DIN EN 13165''), Thermal insulation
products for buildings--Factory made rigid polyurethane foam (PUR)
products--Specification, approved February 2009, IBR approved for
Appendix A to Subpart R of part 431.
(e) NFRC. National Fenestration Rating Council, 6305 Ivy Lane, Ste.
140, Greenbelt, MD 20770, (301) 589-1776, or https://www.nfrc.org/.
(1) NFRC 100-2010[E0A1], (``NFRC 100''), Procedure for Determining
Fenestration Product U-factors, approved June 2010, IBR approved for
Appendix A to Subpart R of part 431.
(2) [Reserved]
0
4. Section 431.304 is amended by redesignating paragraphs (b)(2),
(b)(3), (b)(4), and (b)(5) as (b)(1), (b)(2), (b)(3), and (b)(4),
respectively, and by adding new paragraphs (b)(5), (b)(6), (b)(7), and
(b)(8) to read as follows.
Sec. 431.304 Uniform test method for the measurement of energy
consumption of walk-in coolers and walk-in freezers.
* * * * *
(b) * * *
(5) Determine the U-factor, conduction load, and energy use of
walk-in cooler and walk-in freezer display panels, floor panels, and
non-floor panels by conducting the test procedure set forth in Appendix
A to this subpart, sections 4.1, 4.2, and 4.3, respectively.
(6) Determine the energy use of walk-in cooler and walk-in freezer
display doors and non-display doors by conducting the test procedure
set forth in Appendix A to this subpart, sections 4.4 and 4.5,
respectively.
(7) Determine the Annual Walk-in Energy Factor of walk-in cooler
and walk-in freezer refrigeration systems by conducting the test
procedure set forth in AHRI 1250 (incorporated by reference; see Sec.
431.303).
(8) Determine the annual energy consumption of walk-in cooler and
walk-in freezer refrigeration systems:
[[Page 33632]]
(i) For systems consisting of a packaged dedicated system or a
split dedicated system, where the condensing unit is located outdoors,
by conducting the test procedure set forth in AHRI 1250 and recording
the annual energy consumption term in the equation for annual walk-in
energy factor in section 7 of AHRI 1250:
[GRAPHIC] [TIFF OMITTED] TR09JN11.000
where tj and n represent the outdoor temperature at each
bin j and the number of hours in each bin j, respectively, for the
temperature bins listed in Table D1 of AHRI 1250.
(ii) For systems consisting of a packaged dedicated system or a
split dedicated system where the condensing unit is located in a
conditioned space, by performing the following calculation:
[GRAPHIC] [TIFF OMITTED] TR09JN11.001
where BLH and BLL for refrigerator and freezer systems are defined
in sections 6.2.1 and 6.2.2, respectively, of AHRI 1250 and the
annual walk-in energy factor is calculated from the results of the
test procedures set forth in AHRI 1250.
(iii) For systems consisting of a single unit cooler or a set of
multiple unit coolers serving a single piece of equipment and connected
to a multiplex condensing system, by performing the following
calculation:
[GRAPHIC] [TIFF OMITTED] TR09JN11.002
where BLH and BLL for refrigerator and freezer systems are defined
in section 7.9.2.2 and 7.9.2.3, respectively, of AHRI 1250 and the
annual walk-in energy factor is calculated from the results of the
test procedures set forth in AHRI 1250.
0
5. Appendix A to subpart R of part 431 is added to read as follows:
Appendix A to Subpart R of Part 431--Uniform Test Method for the
Measurement of Energy Consumption of the Components of Envelopes of
Walk-In Coolers and Walk-In Freezers
1.0 Scope
This appendix covers the test requirements used to measure the
energy consumption of the components that make up the envelope of a
walk-in cooler or walk-in freezer.
2.0 Definitions
The definitions contained in Sec. 431.302 are applicable to
this appendix.
3.0 Additional Definitions
3.1 Automatic door opener/closer means a device or control
system that ``automatically'' opens and closes doors without direct
user contact, such as a motion sensor that senses when a forklift is
approaching the entrance to a door and opens it, and then closes the
door after the forklift has passed.
3.2 Core region means the part of the panel that is not the edge
region.
3.3 Edge region means a region of the panel that is wide enough
to encompass any framing members and edge effects. If the panel
contains framing members (e.g. a wood frame) then the width of the
edge region must be as wide as any framing member plus 2 in. 0.25 in. If the panel does not contain framing members then
the width of the edge region must be 4 in 0.25 in. For
walk-in panels that utilize vacuum insulated panels (VIP) for
insulation, the width of the edge region must be the lesser of 4.5
in. 1 in. or the maximum width that does not cause the
VIP to be pierced by the cutting device when the edge region is cut.
3.4 Surface area means the area of the surface of the walk-in
component that would be external to the walk-in. For example, for
panel, the surface area would be the area of the side of the panel
that faces the outside of the walk-in. It would not include edges of
the panel that are not exposed to the outside of the walk-in.
3.5 Rating conditions means, unless explicitly stated otherwise,
all conditions shown in Table A.1. For installations where two or
more walk-in envelope components share any surface(s), the
``external conditions'' of the shared surface(s) must reflect the
internal conditions of the adjacent walk-in. For example, if a walk-
in component divides a walk-in freezer from a walk-in cooler, then
the internal conditions are the freezer rating conditions and the
external conditions are the cooler rating conditions.
3.6 Percent time off (PTO) means the percent of time that an
electrical device is assumed to be off.
Table A.1--Temperature Conditions
------------------------------------------------------------------------
------------------------------------------------------------------------
Internal Temperatures (cooled space within the envelope)
------------------------------------------------------------------------
Cooler Dry Bulb Temperature............... 35 [deg]F.
Freezer Dry Bulb Temperature.............. -10 [deg]F.
------------------------------------------------------------------------
External Temperatures (space external to the envelope)
------------------------------------------------------------------------
Freezer and Cooler Dry Bulb Temperatures.. 75 [deg]F.
------------------------------------------------------------------------
[[Page 33633]]
Subfloor Temperatures
------------------------------------------------------------------------
Freezer and Cooler Dry Bulb Temperatures.. 55 [deg]F.
------------------------------------------------------------------------
4.0 Calculation Instructions
4.1 Display Panels
(a) Calculate the U-factor of the display panel in accordance
with section 5.3 of this appendix, Btu/h-ft\2\-[deg]F.
(b) Calculate the display panel surface area, as defined in
section 3.4 of this appendix, Adp, ft\2\, with standard
geometric formulas or engineering software.
(c) Calculate the temperature differential,
[Delta]Tdp, [deg]F, for the display panel, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.003
Where:
TDB,ext,dp = dry-bulb air external temperature, [deg]F,
as prescribed in Table A.1; and
TDB,int,dp = dry-bulb air temperature internal to the
cooler or freezer, [deg]F, as prescribed in Table A.1.
(d) Calculate the conduction load through the display panel,
Qcond-dp, Btu/h, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.004
Where:
Adp = surface area of the walk-in display panel, ft\2\;
[Delta]Tdp= temperature differential between refrigerated
and adjacent zones, [deg]F; and
Udp = thermal transmittance, U-factor, of the display
panel in accordance with section 5.3 of this appendix, Btu/h-ft\2\-
[deg]F.
(e) Select Energy Efficiency Ratio (EER), as follows:
(1) For coolers, use EER = 12.4 Btu/W-h
(2) For freezers, use EER = 6.3 Btu/W-h
(f) Calculate the total daily energy consumption, Edp,
kWh/day, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.005
Where:
Qcond, dp = the conduction load through the display
panel, Btu/h; and EER = EER of walk-in (cooler or freezer), Btu/W-h.
4.2 Floor Panels
(a) Calculate the surface area, as defined in section 3.4 of this
appendix, of the floor panel edge, as defined in section 3.3,
Afp edge, ft\2\, with standard geometric formulas or
engineering software as directed in section 5.1 of this appendix.
(b) Calculate the surface area, as defined in section 3.4 of this
appendix, of the floor panel core, as defined in section 3.2,
Afp core, ft\2\, with standard geometric formulas or
engineering software as directed in section 5.1 of this appendix.
(c) Calculate the total area of the floor panel, Afp,
ft\2\, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.006
Where:
Afp core = floor panel core area, ft\2\; and
Afp edge = floor panel edge area, ft\2\.
(d) Calculate the temperature differential of the floor panel,
[Delta][Tgr]fp, [deg]F, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.007
Where:
Text, fp = subfloor temperature, [deg]F, as prescribed in
Table A.1; and
TDB,int, fp = dry-bulb air internal temperature, [deg]F,
as prescribed in Table A.1. If the panel spans both cooler and
freezer temperatures, the freezer temperature must be used.
(e) Calculate the floor foam degradation factor, DFfp,
unitless, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.008
Where:
RLTTR,fp = the long term thermal resistance R-value of
the floor panel foam in accordance with section 5.2 of this
appendix, h-ft\2\-[deg]F/Btu; and
Ro,fp = the R-value of foam determined in accordance with
ASTM C518 (incorporated by reference; see section Sec. 431.303) for
purposes of compliance with the appropriate energy conservation
standard, h-ft\2\-[deg]F/Btu.
(f) Calculate the U-factor for panel core region modified by the
long term thermal transmittance of foam, ULT,fp core, Btu/h-
ft\2\-[deg]F, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.009
Where:
Ufp core = the U-factor in accordance with section 5.1 of
this appendix, Btu/h-ft\2\-[deg]F; and
DFfp = floor foam degradation factor, unitless.
(g) Calculate the overall U-factor of the floor panel,
Ufp, Btu/h-ft\2\-[deg]F, as follows:
[[Page 33634]]
[GRAPHIC] [TIFF OMITTED] TR09JN11.010
Where:
Afp edge = area of floor panel edge, ft\2\;
Ufp edge = U-factor for panel edge area in accordance
with section 5.1 of this appendix, Btu/h-ft\2\-[deg]F;
Afp core = area of floor panel core, ft\2\;
ULT,fp core = U-factor for panel core region modified by
the long term thermal transmittance of foam, Btu/h-ft\2\-[deg]F; and
Afp = total area of the floor panel, ft\2\.
(h) Calculate the conduction load through floor panels,
Qcond-fp, Btu/h,
[GRAPHIC] [TIFF OMITTED] TR09JN11.011
Where:
[Delta]Tfp = temperature differential across the floor
panels, [deg]F;
Afp = total area of the floor panel, ft\2\; and
Ufp = overall U-factor of the floor panel, Btu/h-ft\2\-
[deg]F.
(i) Select Energy Efficiency Ratio (EER), as follows:
(1) For coolers, use EER = 12.4 Btu/W-h
(2) For freezers, use EER = 6.3 Btu/W-h
(j) Calculate the total daily energy consumption, Efp,
kWh/day, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.012
Where:
Qcond-fp = the conduction load through the floor panel,
Btu/h; and EER = EER of walk-in (cooler or freezer), Btu/W-h.
4.3 Non-Floor Panels
(a) Calculate the surface area, as defined in section 3.4, of the
non-floor panel edge, as defined in section 3.3, Anf edge,
ft\2\, with standard geometric formulas or engineering software as
directed in section 5.1 of this appendix.
(b) Calculate the surface area, as defined in section 3.4, of the
non-floor panel core, as defined in section 3.2, Anf core,
ft\2,\ with standard geometric formulas or engineering software as
directed in section 5.1 of this appendix.
(c) Calculate total non-floor panel area, Anf, ft\2\:
[GRAPHIC] [TIFF OMITTED] TR09JN11.013
Where:
Anf edge = non-floor panel edge area, ft\2\; and
Anf core = non-floor panel core area, ft\2\.
(d) Calculate temperature differential, [Delta]Tnf,
[deg]F:
[GRAPHIC] [TIFF OMITTED] TR09JN11.014
Where:
TDB,ext, nf = dry-bulb air external temperature, [deg]F,
as prescribed in Table A.1; and
TDB,int, nf = dry-bulb air internal temperature, [deg]F,
as prescribed in Table A.1. If the non-floor panel spans both cooler
and freezer temperatures, then the freezer temperature must be used.
(e) Calculate the non-floor foam degradation factor,
DFnf, unitless, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.015
Where:
RLTTR,nf = the R-value of the non-floor panel foam in
accordance with section 5.2 of this appendix, h- ft\2\-[deg]F/Btu;
and
Ro,nf = the R-value of foam determined in accordance with
ASTM C518 (incorporated by reference; see section Sec. 431.303) for
purposes of compliance with the appropriate energy conservation
standard, h-ft\2\-[deg]F/Btu.
(f) Calculate the U-factor, ULT,nf core, Btu/h-ft\2\-
[deg]F, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.016
Where:
Unf core = the U-factor, in accordance with section 5.1
of this appendix, of non-floor panel, Btu/h- ft\2\-[deg]F; and
DFnf = the non-floor foam degradation factor, unitless.
(g) Calculate the overall U-factor of the non-floor panel,
Unf, Btu/h-ft\2\-[deg]F, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.017
Where:
Anf edge = area of non-floor panel edge, ft\2\;
Unf edge = U-factor for non-floor panel edge area in
accordance with section 5.1 of this appendix, Btu/h-ft\2\-[deg]F;
Anf core = area of non-floor panel core, ft\2\;
ULT,nf core = U-factor for non-floor panel core region
modified by the long term thermal transmittance of foam, Btu/h-
ft\2\-[deg]F; and
Anf = total area of the non- floor panel, ft\2\.
(h) Calculate the conduction load through non-floor panels,
Qcond-nf, Btu/h,
[[Page 33635]]
[GRAPHIC] [TIFF OMITTED] TR09JN11.018
Where:
[Delta]Tnf = temperature differential across the non-
floor panels, [deg]F;
Anf = total area of the non-floor panel, ft\2\; and
Unf = overall U-factor of the non-floor panel, Btu/h-
ft\2\-[deg]F.
(i) Select Energy Efficiency Ratio (EER), as follows:
(1) For coolers, use EER = 12.4 Btu/W-h
(2) For freezers, use EER = 6.3 Btu/W-h
(j) Calculate the total daily energy consumption, Enf,
kWh/day, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.019
Where:
Qcond-nf = the conduction load through the non-floor
panel, Btu/h; and
EER = EER of walk-in (cooler or freezer), Btu/W-h.
4.4 Display Doors
4.4.1 Conduction Through Display Doors
(a) Calculate the U-factor of the door in accordance with section
5.3 of this appendix, Btu/h-ft\2\-[deg]F
(b) Calculate the surface area, as defined in section 3.4 of this
appendix, of the display door, Add, ft\2\, with standard
geometric formulas or engineering software.
(c) Calculate the temperature differential, [Delta]Tdd,
[deg]F, for the display door as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.020
Where:
TDB,ext, dd = dry-bulb air temperature external to the
display door, [deg]F, as prescribed in Table A.1; and
TDB,int, dd = dry-bulb air temperature internal to the
display door, [deg]F, as prescribed in Table A.1.
(d) Calculate the conduction load through the display doors,
Qcond-dd, Btu/h, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.021
Where:
[Delta]Tdd = temperature differential between
refrigerated and adjacent zones, [deg]F;
Add = surface area walk-in display doors, ft\2\; and
Udd = thermal transmittance, U-factor of the door, in
accordance with section 5.3 of this appendix, Btu/h-ft\2\-[deg]F.
4.4.2 Direct Energy Consumption of Electrical Component(s) of Display
Doors
Electrical components associated with display doors could include,
but are not limited to: heater wire (for anti-sweat or anti-freeze
application); lights (including display door lighting systems); control
system units; and sensors.
(a) Select the required value for percent time off (PTO) for each
type of electricity consuming device, PTOt (%)
(1) For lights without timers, control system or other demand-based
control, PTO = 25 percent. For lighting with timers, control system or
other demand-based control, PTO = 50 percent.
(2) For anti-sweat heaters on coolers (if included): Without
timers, control system or other demand-based control, PTO = 0 percent.
With timers, control system or other demand-based control, PTO = 75
percent. For anti-sweat heaters on freezers (if included): Without
timers, control system or other auto-shut-off systems, PTO = 0 percent.
With timers, control system or other demand-based control, PTO = 50
percent.
(3) For all other electricity consuming devices: Without timers,
control system, or other auto-shut-off systems, PTO = 0 percent. If it
can be demonstrated that the device is controlled by a preinstalled
timer, control system or other auto-shut-off system, PTO = 25 percent.
(b) Calculate the power usage for each type of electricity
consuming device, Pdd-comp,u,t, kWh/day, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.022
Where:
u = the index for each of type of electricity-consuming device
located on either (1) the interior facing side of the display door
or within the inside portion of the display door, (2) the exterior
facing side of the display door, or (3) any combination of (1) and
(2). For purposes of this calculation, the interior index is
represented by u = int and the exterior index is represented by u =
ext. If the electrical component is both on the interior and
exterior side of the display door then u = int. For anti-sweat
heaters sited anywhere in the display door, 75 percent of the total
power is be attributed to u = int and 25 percent of the total power
is attributed to u = ext;
t = index for each type of electricity consuming device with
identical rated power;
Prated,u,t = rated power of each component, of type t,
kW;
PTOu,t = percent time off, for device of type t, %; and
nu,t = number of devices at the rated power of type t,
unitless.
(c) Calculate the total electrical energy consumption for interior
and exterior power, Pdd-tot, int (kWh/day) and
Pdd-tot, ext (kWh/day), respectively, as follows:
[[Page 33636]]
[GRAPHIC] [TIFF OMITTED] TR09JN11.023
Where:
t = index for each type of electricity consuming device with
identical rated power;
Pdd-comp,int, t = the energy usage for an electricity
consuming device sited on the interior facing side of or in the
display door, of type t, kWh/day; and
Pdd-comp,ext, t = the energy usage for an electricity
consuming device sited on the external facing side of the display
door, of type t, kWh/day.
(d) Calculate the total electrical energy consumption,
Pdd-tot, (kWh/day), as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.024
Where:
Pdd-tot,int = the total interior electrical energy usage
for the display door, kWh/day; and
Pdd-tot,ext = the total exterior electrical energy usage
for the display door, kWh/day.
4.4.3 Total Indirect Electricity Consumption Due to Electrical Devices
(a) Select Energy Efficiency Ratio (EER), as follows:
(1) For coolers, use EER = 12.4 Btu/Wh
(2) For freezers, use EER = 6.3 Btu/Wh
(b) Calculate the additional refrigeration energy consumption due
to thermal output from electrical components sited inside the display
door, Cdd-load, kWh/day, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.025
Where:
EER = EER of walk-in cooler or walk-in freezer, Btu/W-h; and
Pdd-tot,int = The total internal electrical energy
consumption due for the display door, kWh/day.
4.4.4 Total Display Door Energy Consumption
(a) Select Energy Efficiency Ratio (EER), as follows:
(1) For coolers, use EER = 12.4 Btu/W-h
(2) For freezers, use EER = 6.3 Btu/W-h
(b) Calculate the total daily energy consumption due to conduction
thermal load, Edd, thermal, kWh/day, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.026
Where:
Qcond, dd = the conduction load through the display door,
Btu/h; and
EER = EER of walk-in (cooler or freezer), Btu/W-h.
(c) Calculate the total energy, Edd,tot, kWh/day,
[GRAPHIC] [TIFF OMITTED] TR09JN11.027
Where:
Edd, thermal = the total daily energy consumption due to
thermal load for the display door, kWh/day;
Pdd-tot = the total electrical load, kWh/day; and
Cdd-load = additional refrigeration load due to thermal
output from electrical components contained within the display door,
kWh/day.
4.5 Non-Display Doors
4.5.1 Conduction Through Non-Display Doors
(a) Calculate the surface area, as defined in section 3.4 of this
appendix, of the non-display door, And, ft\2\, with standard
geometric formulas or with engineering software.
(b) Calculate the temperature differential of the non-display door,
[Delta]Tnd,[deg]F, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.028
Where:
TDB,ext, nd = dry-bulb air external temperature, [deg]F,
as prescribed by Table A.1; and
TDB,int, nd = dry-bulb air internal temperature, [deg]F,
as prescribed by Table A.1. If the component spans both cooler and
freezer spaces, the freezer temperature must be used.
(c) Calculate the conduction load through the non-display door:
Qcond-nd, Btu/h,
[[Page 33637]]
[GRAPHIC] [TIFF OMITTED] TR09JN11.029
Where:
[Delta]Tnd = temperature differential across the non-
display door, [deg]F;
Und = thermal transmittance, U-factor of the door, in
accordance with section 5.3 of this appendix, Btu/h-ft\2\-[deg]F;
and
And = area of non-display door, ft\2\.
4.5.2 Direct Energy Consumption of Electrical Components of Non-Display
Doors
Electrical components associated with a walk-in non-display door
comprise any components that are on the non-display door and that
directly consume electrical energy. This includes, but is not limited
to, heater wire (for anti-sweat or anti-freeze application), control
system units, and sensors.
(a) Select the required value for percent time off for each type of
electricity consuming device, PTOt (%)
(1) For lighting without timers, control system or other demand-
based control, PTO = 25 percent. For lighting with timers, control
system or other demand-based control, PTO = 50 percent.
(2) For anti-sweat heaters on coolers (if included): Without
timers, control system or other demand-based control, PTO = 0 percent.
With timers, control system or other demand-based control, PTO = 75
percent. For anti-sweat heaters on freezers (if included): Without
timers, control system or other auto-shut-off systems, PTO = 0 percent.
With timers, control system or other demand-based control, PTO = 50
percent.
(3) For all other electricity consuming devices: Without timers,
control system, or other auto-shut-off systems, PTO = 0 percent. If it
can be demonstrated that the device is controlled by a preinstalled
timer, control system or other auto-shut-off system, PTO = 25 percent.
(b) Calculate the power usage for each type of electricity
consuming device, Pnd-comp,u,t, kWh/day, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.030
Where:
u = the index for each of type of electricity-consuming device
located on either (1) the interior facing side of the display door
or within the inside portion of the display door, (2) the exterior
facing side of the display door, or (3) any combination of (1) and
(2). For purposes of this calculation, the interior index is
represented by u = int and the exterior index is represented by u =
ext. If the electrical component is both on the interior and
exterior side of the display door then u = int. For anti-sweat
heaters sited anywhere in the display door, 75 percent of the total
power is be attributed to u=int and 25 percent of the total power is
attributed to u=ext;
t = index for each type of electricity consuming device with
identical rated power;
Prated,u,t = rated power of each component, of type t,
kW;
PTOu,t = percent time off, for device of type t, %; and
nu,t = number of devices at the rated power of type t,
unitless.
(c) Calculate the total electrical energy consumption for interior
and exterior power, Pnd-tot, int (kWh/day) and
Pnd-tot, ext (kWh/day), respectively, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.031
Where:
t = index for each type of electricity consuming device with
identical rated power;
Pnd-comp,int, t = the energy usage for an electricity
consuming device sited on the internal facing side or internal to
the non-display door, of type t, kWh/day; and
Pnd-comp,ext, t = the energy usage for an electricity
consuming device sited on the external facing side of the non-
display door, of type t, kWh/day. For anti-sweat heaters,
(d) Calculate the total electrical energy consumption,
Pnd-tot, kWh/day, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.032
Where:
Pnd-tot,int = the total interior electrical energy usage
for the non-display door, of type t, kWh/day; and
Pnd-tot,ext = the total exterior electrical energy usage
for the non-display door, of type t, kWh/day.
4.5.3 Total Indirect Electricity Consumption Due to Electrical Devices
(a) Select Energy Efficiency Ratio (EER), as follows:
(1) For coolers, use EER = 12.4 Btu/Wh
(2) For freezers, use EER = 6.3 Btu/Wh
(b) Calculate the additional refrigeration energy consumption due
to thermal output from electrical components associated with the non-
display door, Cnd-load, kWh/day, as follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.033
Where:
EER = EER of walk-in cooler or freezer, Btu/W-h; and
Pnd-tot,int = the total interior electrical energy
consumption for the non-display door, kWh/day.
4.5.4 Total Non-Display Door Energy Consumption
(a) Select Energy Efficiency Ratio (EER), as follows:
(1) For coolers, use EER = 12.4 Btu/W-h
(2) For freezers, use EER = 6.3 Btu/W-h
(b) Calculate the total daily energy consumption due to thermal
load, End, thermal, kWh/day, as follows:
[[Page 33638]]
[GRAPHIC] [TIFF OMITTED] TR09JN11.034
Where:
Qcond-nd = the conduction load through the non-display
door, Btu/hr; and
EER = EER of walk-in (cooler or freezer), Btu/W-h.
(c) Calculate the total energy, End,tot, kWh/day, as
follows:
[GRAPHIC] [TIFF OMITTED] TR09JN11.035
Where:
End, thermal = the total daily energy consumption due to
thermal load for the non-display door, kWh/day;
Pnd-tot = the total electrical energy consumption, kWh/
day; and
Cnd-load = additional refrigeration load due to thermal
output from electrical components contained on the inside face of
the non-display door, kWh/day.
5.0 Test Methods and Measurements
5.1 Measuring Floor and Non-floor Panel U-factors
Follow the test procedure in ASTM C1363, (incorporated by
reference; see Sec. 431.303), exactly, with these exceptions:
(1) Test Sample Geometry Requirements
(i) Two (2) panels, 8 ft. 1 ft. long and 4 ft. 1 ft. wide must be used.
(ii) The panel edges must be joined using the manufacturer's panel
interface joining system (e.g., camlocks, standard gasketing, etc.).
(iii) The Panel Edge Test Region, see figure 1, must be cut using
the following dimensions:
1. If the panel contains framing members (e.g. a wood frame), then
the width of edge (W) must be as wide as any framing member plus 2 in.
0.25 in. For example, if the face of the panel contains
1.5 in. thick framing members around the edge of the panel, then width
of edge (W) = 3.5 in. 0.25 in and the Panel Edge Test
Region would be 7 in. 0.5 in. wide.
2. If the panel does not contain framing members, then the width of
edge (W) must be 4 in 0. 25 in.
3. Walk-in panels that utilize vacuum insulated panels (VIP) for
insulation, width of edge (W) = the lesser of 4.5 in. 1
in. or the maximum width that does not cause the VIP to be pierced by
the cutting device when the edge region is cut.
(iv) Panel Core Test Region of length Y and height Z, see Figure 1,
must also be cut from one of the two panels such that panel length = Y
+ X, panel height = Z +X where X=2W.
[GRAPHIC] [TIFF OMITTED] TR09JN11.036
(2) Testing Conditions
(i) The air temperature on the ``hot side'', as denoted in ASTM
C1363, of the non-floor panel should be maintained at 75 [deg]F 1 [deg]F.
1. Exception: When testing floor panels, the air temperature should
be maintained at 55 [deg]F 1 [deg]F.
[[Page 33639]]
(ii) The temperature on the ``cold side'', as denoted in ASTM
C1363, of the panel should be maintained at 35 [deg]F 1
[deg]F for the panels used for walk-in coolers and -10 [deg]F 1 [deg]F for panels used for walk-in freezers.
(iii) The air velocity must be maintained as natural convection
conditions as described in ASTM C1363. The test must be completed using
the masked method and with surround panel in place as described in ASTM
C1363.
(3) Required Test Measurements
(i) Non-floor Panels
1. Panel Edge Region U-factor: Unf, edge
2. Panel Core Region U-factor: Unf, core
(ii) Floor Panels
1. Floor Panel Edge Region U-factor: Ufp, edge
2. Floor Panel Core Region U-factor: Ufp, core
5.2 Measuring Long Term Thermal Resistance (LTTR) of Insulating Foam
Follow the test procedure in Annex C of DIN EN 13164 or Annex C of
DIN EN 13165 (as applicable), (incorporated by reference; see Sec.
431.303), exactly, with these exceptions:
(1) Temperatures During Thermal Resistance Measurement
(i) For freezers: 20 [deg]F 1 [deg]F must be used.
(ii) For coolers: 55 [deg]F 1 [deg]F must be used.
(2) Sample Panel Preparation
(i) A 800mm x 800mm square (x thickness of the panel) section cut
from the geometric center of the panel that is being tested must be
used as the sample for completing DIN EN 13165.
(ii) A 500mm x 500mm square (x thickness of the panel) section cut
from the geometric center of the panel that is being tested must be
used as the sample for completing DIN EN 13164.
(3) Required Test Measurements
(i) Non-floor Panels
1. Long Term Thermal Resistance: RLTTR,nf
(ii) Floor Panels
1. Long Term Thermal Resistance: RLTTR,fp
5.3 U-factor of Doors and Display Panels
(a) Follow the procedure in NFRC 100, (incorporated by reference;
see Sec. 431.303), exactly, with these exceptions:
(1) The average convective heat transfer coefficient on both
interior and exterior surfaces of the door should be based on the
coefficients described in section 4.3 of NFRC 100.
(2) Internal conditions:
(i) Air temperature of 35 [deg]F (1.7 [deg]C) for cooler doors and
-10 [deg]F (-23.3 [deg]C) for freezer doors
(ii) Mean inside radiant temperature must be the same as shown in
section 5.3(a)(2)(i), above.
(3) External conditions
(i) Air temperature of 75 [deg]F (23.9 [deg]C)
(ii) Mean outside radiant temperature must be the same as section
5.3(a)(3)(i), above.
(4) Direct solar irradiance = 0 W/m\2\ (Btu/h-ft\2\).
(b) Required Test Measurements
(i) Display Doors and Display Panels
1. Thermal Transmittance: Udd
(ii) Non-Display Door
1. Thermal Transmittance: Und
[FR Doc. C1-2011-8690 Filed 6-8-11; 8:45 am]
BILLING CODE 1505-01-D
