Federal Register / Vol. 76, No. 111 / Thursday, June 9, 2011 / Rules and Regulations 33631 

[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. 

* * * * * 

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. 

* * * * * 

■ 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 http:// 

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 

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 http:// 

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 http://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: 

mstockstill on DSK4VPTVN1PROD with RULES

33632 Federal Register / Vol. 76, No. 111 / Thursday, June 9, 2011 / Rules and Regulations 

(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: 

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: 

where BL ̇H and BL ̇L 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: 

where BL ̇H and BL ̇L 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. 

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 °F. 

Freezer Dry Bulb Temperature .............................................................................................................................................................. ¥10 °F. 

External Temperatures (space external to the envelope) 

Freezer and Cooler Dry Bulb Temperatures ......................................................................................................................................... 75 °F. 


mstockstill on DSK4VPTVN1PROD with RULESER09JN11.000</GPH> ER09JN11.001</GPH> ER09JN11.002</GPH>
Federal Register / Vol. 76, No. 111 / Thursday, June 9, 2011 / Rules and Regulations 33633 

TABLE A.1—TEMPERATURE CONDITIONS—Continued 

Subfloor Temperatures 

Freezer and Cooler Dry Bulb Temperatures ......................................................................................................................................... 55 °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-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. 

(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/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. 

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, ft2, 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, ft2, 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, ft2, as follows: 

Where: 

Afp core = floor panel core area, ft2; and 

Afp edge = floor panel edge area, ft2. 

(d) Calculate the temperature 

differential of the floor panel, DTfp, °F, 

as follows: 

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. 

(e) Calculate the floor foam 

degradation factor, DFfp, unitless, as 

follows: 

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

core, Btu/h-ft2-°F, 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: 


mstockstill on DSK4VPTVN1PROD with RULESER09JN11.003</GPH> ER09JN11.004</GPH> ER09JN11.005</GPH> ER09JN11.006</GPH> ER09JN11.007</GPH> ER09JN11.008</GPH> ER09JN11.009</GPH>
33634 Federal Register / Vol. 76, No. 111 / Thursday, June 9, 2011 / Rules and Regulations 

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; 

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. 

(h) Calculate the conduction load 

through floor panels, Qcond-fp, Btu/h, 

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. 

(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/Wh 

(j) Calculate the total daily energy 

consumption, Efp, kWh/day, as follows: 

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, ft2, 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, ft2, with standard geometric 

formulas or engineering software as 

directed in section 5.1 of this appendix. 

(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: 

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. 

(f) Calculate the U-factor, ULT,nf core, 

Btu/h-ft2-°F, as follows: 

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: 

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; 

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. 

(h) Calculate the conduction load 

through non-floor panels, Qcond-nf, Btu/h, 


mstockstill on DSK4VPTVN1PROD with RULESER09JN11.010</GPH> ER09JN11.011</GPH> ER09JN11.012</GPH> ER09JN11.013</GPH> ER09JN11.014</GPH> ER09JN11.015</GPH> ER09JN11.016</GPH> ER09JN11.017</GPH>
Federal Register / Vol. 76, No. 111 / Thursday, June 9, 2011 / Rules and Regulations 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 

(2) For freezers, use EER = 6.3 Btu/Wh 

(j) Calculate the total daily energy 

consumption, Enf, kWh/day, as follows: 

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-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: 

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. 

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 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. 

(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: 


mstockstill on DSK4VPTVN1PROD with RULESER09JN11.018</GPH> ER09JN11.019</GPH> ER09JN11.020</GPH> ER09JN11.021</GPH> ER09JN11.022</GPH>
33636 Federal Register / Vol. 76, No. 111 / Thursday, June 9, 2011 / Rules and Regulations 

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: 

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 

(2) For freezers, use EER = 6.3 Btu/Wh 

(b) Calculate the total daily energy 

consumption due to conduction thermal 

load, Edd, thermal, kWh/day, as follows: 

E Q

EER dd,thermal

cond,dd = × ×

×

24 h 1 kW

1 day 000 W

4-25

1 ( )

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, 

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 NonDisplay Doors 

(a) Calculate the surface area, as 

defined in section 3.4 of this appendix, 

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: 

Where: 

TDB,ext, nd = dry-bulb air external temperature, 

°F, as prescribed by Table A.1; and 

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. 

(c) Calculate the conduction load 

through the non-display door: Qcond-nd, 

Btu/h, 


mstockstill on DSK4VPTVN1PROD with RULESER09JN11.023</GPH> ER09JN11.024</GPH> ER09JN11.025</GPH> ER09JN11.026</GPH> ER09JN11.027</GPH> ER09JN11.028</GPH>
Federal Register / Vol. 76, No. 111 / Thursday, June 9, 2011 / Rules and Regulations 33637 

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. 

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 nondisplay door and that directly consume 

electrical energy. This includes, but is 

not limited to, heater wire (for antisweat 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: 

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. 

(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: 

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: 

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 nondisplay door, Cnd-load, kWh/day, as 

follows: 

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/Wh 

(b) Calculate the total daily energy 

consumption due to thermal load, End,

thermal, kWh/day, as follows: 


mstockstill on DSK4VPTVN1PROD with RULESER09JN11.029</GPH> ER09JN11.030</GPH> ER09JN11.031</GPH> ER09JN11.032</GPH> ER09JN11.033</GPH>
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. 

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 

§ 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. 

(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 °F ± 1 °F. 

1. Exception: When testing floor 

panels, the air temperature should be 

maintained at 55 °F ± 1 °F. 


mstockstill on DSK4VPTVN1PROD with RULESER09JN11.034</GPH> ER09JN11.035</GPH> ER09JN11.036</GPH>
Federal Register / Vol. 76, No. 111 / Thursday, June 9, 2011 / Rules and Regulations 33639 

(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. 

(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 

§ 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 °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

[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 

AGENCY: Coast Guard, DHS. 

ACTION: Temporary Final rule. 

SUMMARY: 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. 

DATES: 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 http://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 

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. 

FOR FURTHER INFORMATION CONTACT: 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. 

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. 

mstockstill on DSK4VPTVN1PROD with RULES