1、 2011 Standard for Performance Rating of Commercial Refrigerated Display Merchandisers and Storage Cabinets for Use With Secondary Refrigerants AHRI Standard 1321 (SI) Copyright 2011, by Air-Conditioning, Heating and Refrigeration Institute Registered United States Patent and Trademark Office Price
2、$10.00 (Members) $20.00 (Non-Members) Printed in U. S.A. IMPORTANT SAFETY DISCLAIMER AHRI does not set safety standards and does not certify or guarantee the safety of any products, components or systems designed, tested, rated, installed or operated in accordance with this standard/guideline. It is
3、 strongly recommended that products be designed, constructed, assembled, installed and operated in accordance with nationally recognized safety standards and code requirements appropriate for products covered by this standard/guideline. AHRI uses its best efforts to develop standards/guidelines empl
4、oying state-of-the-art and accepted industry practices. AHRI does not certify or guarantee that any tests conducted under its standards/guidelines will be non-hazardous or free from risk. Note: This standard is a new standard. For I-P ratings, see AHRI Standard 1320 (I-P) 2011. i TABLE OF CONTENTS S
5、ECTION PAGE Section 1. Purpose 1 Section 2. Scope .1 Section 3. Definitions .1 Section 4. Test Requirements .3 Section 5. Rating Requirements .3 Section 6. Symbols and Subscripts .8 Section 7. Minimum Data Requirements for Published Ratings 9 Section 8. Marking and Nameplate Data 9 Section 9. Confor
6、mance Conditions .9 TABLES Table 1. EER for Remote Commercial Refrigerated Display Merchandisers and Storage Cabinets for Use With Secondary Refrigerants 6 Table 2. Presentation of Data for Remote Commercial Refrigerated Display Merchandisers and Storage Cabinets for Use With Secondary Refrigerants
7、10 ii APPENDICES Appendix A. References - Normative 11 Appendix B. References - Informative.11 Appendix C. Commercial Refrigerated Display Merchandisers and Storage Cabinets for Use with Secondary Refrigerants Load Line Volume Calculation - Normative 12 Appendix D. Commercial Refrigerated Display Me
8、rchandisers for Use with Secondary Refrigerants Total Display Area (TDA) Calculation - Normative .15 Appendix E. Example Energy Performance Representation for Remote Commercial Refrigerated Display Merchandisers or Storage Cabinets for Use with Secondary Refrigerants - Informative .20 TABLES FOR APP
9、ENDICES Table E1. Sample Presentation of Data for Remote Commercial Refrigerated Display Merchandisers and Storage Cabinets for Use with Secondary Refrigerants .22 FIGURES FOR APPENDICES Figure C1.1. Sample Isometric View of Commercial Refrigerated Display Merchandisers for Illustrating Length of Re
10、frigerated Space 12 Figure C1.2. Sample Cross Sections of Commercial Refrigerated Display Merchandisers for Load Line Volume Calculation 13 Figure C2. Sample Cross Section of Commercial Refrigerated Storage Cabinets for Volume Calculation .14 Figure D1. Vertical Open Multi-deck 15 Figure D2. Vertica
11、l Open Multi-deck with Transparent Front 15 Figure D3. Semi-vertical Open Multi-deck .16 Figure D4. Semi-vertical Open Multi-deck with Transparent Front .16 Figure D5. Horizontal Open Single-deck 16 iii Figure D6. Horizontal Open Single-deck with Transparent Front 16 Figure D7. Service Over Counter
12、with Flat Transparent Front .17 Figure D8. Service Over Counter with Curved Transparent Front 17 Figure D9. Horizontal Open Single-deck Island .17 Figure D10. Horizontal Open Single-deck Island with Transparent Wall 17 Figure D11. Horizontal Open Single-deck Island with Transparent Walls .17 Figure
13、D12. Vertical Closed Multi-deck with Transparent Doors 17 Figure D13. Vertical End Wall with Transparent Section .18 Figure D14. Semi-vertical End Wall with Transparent Section 18 Figure D15. Horizontal Single-deck and Single-deck Island End Wall with Transparent Section .18 Figure D16. Service Over
14、 Counter End Wall with Transparent Section .18 Figure D17. Example TDA for Unique Geometries 19 AHRI STANDARD 1321 (SI)-2011 1 PERFORMANCE RATING OF COMMERCIAL REFRIGERATED DISPLAY MERCHANDISERS AND STORAGE CABINETS FOR USE WITH SECONDARY REFRIGERANTS Section 1. Purpose 1.1 Purpose. The purpose of t
15、his standard is to establish for Commercial Refrigerated Display Merchandisers and Storage Cabinets that use secondary refrigerants: definitions; test requirements; rating requirements; symbols and subscripts; minimum data requirements for Published Ratings; marking and nameplate data and conformanc
16、e conditions. 1.1.1 Intent. This standard is intended for the guidance of the industry, including manufacturers, engineers, installers, contractors and users. The values reported using this standard allow comparison of energy consumption within each of the following product categories: Remote Commer
17、cial Refrigerated Display Merchandisers, Remote Commercial Refrigerated Storage Cabinets and Self-contained Commercial Refrigerated Display Merchandisers. 1.1.2 Review and Amendment. This standard is subject to review and amendment as technology advances. Section 2. Scope 2.1 Scope. This standard ap
18、plies to the following Commercial Refrigerated Display Merchandisers and Storage Cabinets, provided that the cases are equipped and designed to work with electrically driven, medium-temperature, single-phase secondary coolant systems: 2.1.1 Remote Commercial Refrigerated Display Merchandisers and St
19、orage Cabinets 2.1.2 Open and Closed Commercial Refrigerated Display Merchandisers 2.2 Exclusions. This standard does not apply to the following: 2.2.1 Refrigerated vending machines 2.2.2 Ice makers 2.2.3 Soft serve extruders 2.2.4 Low-temperature applications 2.2.5 Secondary coolants involving a ch
20、ange of phase (e.g. ice slurries, CO2) 2.2.6 Self-contained Commercial Refrigerated Display Merchandisers and storage cabinets Section 3. Definitions All terms in this document shall follow the standard industry definitions in the current edition of ASHRAE Terminology of Heating, Ventilation, Air Co
21、nditioning and Refrigeration unless otherwise defined in this section. 3.1 Anti-condensate Energy Consumption (AEC). The Total Daily Energy Consumption used in condensate removal on the outside of the Commercial Refrigerated Display Merchandiser or Storage Cabinet, which typically includes fan and c
22、ondensate heater energy expressed in kWh per day. 3.2 Calculated Daily Energy Consumption (CDEC). This is a value for Remote Commercial Refrigerated Display Merchandisers or Storage Cabinets based upon the requirements of this standard expressed in kWh per day. 3.3 Coefficient of Performance (COP).
23、A ratio of the cooling capacity in watts W to the power input value in watts W at any given set of Rating Conditions expressed in W/W. AHRI STANDARD 1321 (SI)-2011 2 3.4 Circulation Pump Energy Consumption (CPEC). The energy consumed by the pump used to circulate secondary coolant expressed in kWh p
24、er day. 3.5 Circulation Pump Heat Input (QCP.) The energy transferred to the secondary coolant as a result of the work done on the coolant by the circulation pump expressed in W. 3.6 Commercial Refrigerated Display Merchandiser. A cabinet cooled by a refrigerating system for displaying chilled and/o
25、r frozen food to be maintained within prescribed temperature limits. 3.6.1 Closed Commercial Refrigerated Display Merchandiser. A refrigerated display merchandiser where food is accessible for removal by opening or moving doors or panels. 3.6.2 Open Commercial Refrigerated Display Merchandiser. A re
26、frigerated display merchandiser where food is accessible for removal without opening or moving doors or panels. 3.6.3 Remote Commercial Refrigerated Display Merchandiser. A refrigerated display merchandiser that has a remote condensing unit. 3.6.4 Service Over the Counter (SOC). A commercial refrige
27、rator or freezer equipped with sliding or hinged doors in the back intended for use by sales personnel, and with glass or other transparent material in the front for displaying merchandise. The equipment has a height no greater than 167.6 centimeters and is intended to serve as a counter for transac
28、tions between sales personnel and customers. 3.7 Commercial Refrigerated Storage Cabinet. A closed cabinet cooled by a refrigerating system for storing chilled and/or frozen food to be maintained within prescribed temperature limits. 3.7.1 Remote Commercial Refrigerated Storage Cabinet. A refrigerat
29、ed storage cabinet that has a remote condensing unit. 3.8 Compressor Energy Consumption (CEC). The energy consumed by the compressor expressed in kWh per day. 3.9 Condensate Evaporator Pan Energy Consumption (PEC). The amount of heat energy required to change condensate from liquid to a vapor in the
30、 evaporator pan expressed in kWh per day. 3.10 Defrost Energy Consumption (DEC). The energy consumed during defrost cycles expressed in kWh per day. 3.11 Dew Point. Refrigerant vapor saturation temperature at a specified pressure expressed in C. 3.11.1 Adjusted Dew Point. An adjusted temperature low
31、er than actual Dew Point temperature expressed in C, resulting from suction line pressure losses, equal to saturated suction temperature at the compressor. 3.12 Fan Energy Consumption (FEC). The energy consumed by fan motors expressed in kWh per day. 3.13 Integrated Average Temperature. The average
32、of all test package measurements taken during the test expressed in C. 3.14 Lighting Energy Consumption (LEC). The energy consumed by lighted shelves and lighting internal to the refrigerated display merchandiser or storage cabinet expressed in kWh per day. 3.15 Product Temperature. Commercial Refri
33、gerated Display Merchandisers or Storage Cabinets shall be tested with one or more of the following Integrated Average Temperatures: 3.15.1 Medium Temperature Applications. Commercial Refrigerated Display Merchandisers and Storage Cabinets intended for Medium Temperature Applications, shall have an
34、Integrated Average Temperature of 3.3C 1.1C. 3.15.2 Application Product Temperature. This test allows Integrated Average Temperatures other than Section 3.15.1. 3.16 Published Rating. A statement of the assigned values of those performance characteristics, under stated Rating AHRI STANDARD 1321 (SI)
35、-2011 3 Conditions, by which a unit may be chosen for its application. The term Published Rating includes the rating of all performance characteristics shown on the unit or published in specifications, advertising or other literature controlled by the manufacturer, at stated Rating Conditions. 3.16.
36、1 Application Rating. A rating based on tests performed at application Rating Conditions (other than Standard Rating Conditions). 3.16.2 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.17 Rating Conditions. Any set of operating conditions under which a single leve
37、l of performance results and which causes only that level of performance to occur. 3.17.1 Standard Rating Conditions. Rating Conditions used as the basis of comparison for performance characteristics. 3.18 Secondary Coolant. Fluid used for the transmission of heat without a complete or partial chang
38、e of phase within the cabinet. This standard applies to single-phase applications where the fluid is 35% propylene glycol or a fluid with similar viscosity and heat transfer properties. 3.19 “Shall“ or “Should“. “Shall“ or “should“ shall be interpreted as follows: 3.19.1 Shall. Where “shall“ or “sha
39、ll not“ is used for a provision specified, that provision is mandatory if compliance with the standard is claimed. 3.19.2 Should. “Should“ is used to indicate provisions which are not mandatory but which are desirable as good practice. 3.20 Total Display Area (TDA). The sum of the projected area(s)
40、for visible product expressed in m2. 3.21 Volume. Two methods are defined for determining refrigerated volume. 3.21.1 AHAM Volume Method. The interior volume of a refrigerator as calculated by AHAM HRF-1. 3.21.2 Load Line Volume Method. The gross interior volume of the refrigerator contained within
41、the load limit lines. This gross volume shall be calculated without display devices installed. Section 4. Test Requirements 4.1 Test Requirements. The tests required for this standard shall be conducted in accordance with ANSI/ASHRAE Standard 72. 4.1.1 Dry-Bulb Temperature. The average test-room dry
42、-bulb temperatureshall be 24.0C 1.0C, when measured in accordance with ANSI/ASHRAE Standard 72. 4.1.2 Wet-Bulb Temperature. The average test-room wet-bulb temperature shall be 18.0C 1.0C, when measured in accordance with ANSI/ASHRAE Standard 72. Section 5. Rating Requirements 5.1 General. This secti
43、on identifies the necessary data required to calculate the CDEC for Remote Commercial Refrigerated Display Merchandisers and Storage Cabinets for use with secondary refrigerants. AHRI STANDARD 1321 (SI)-2011 4 5.2 CDEC for Remote Commercial Refrigerated Display Merchandisers and Storage Cabinets. Th
44、e total electrical load shall be measured and adjusted to determine CDEC. The electrical load categories shall include compressors, evaporator fan motors, lighting, surface anti-condensate load including fans and heaters, defrost heaters, condensate evaporator pans, secondary coolant circulation pum
45、ps and any other suitable electrical loads when they are part of the unit. If measured electrical loads are not available, the following calculations shall be done to determine the CDEC. CDEC = CEC + FEC + LEC + AEC + DEC + PEC + CPEC 1 Remote Commercial Refrigerated Display Merchandisers and Storag
46、e Cabinets shall report the individual loads in the calculation of CDEC. Shown below are formulae for the required individual loads. 5.2.1 Calculation of CEC. The COP values in Table 1 shall be used to calculate CEC for a 24 hour period. Note: The COP values in Table 1 are based on an evaporator tem
47、perature and the Commercial Refrigerated Display Merchandiser or Storage Cabinet classification. Commercial Refrigerated Display Merchandisers and Storage Cabinets for Medium Temperature Secondary Applications shall use a temperature that is 4.0C lower than the Commercial Refrigerated Display Mercha
48、ndiser or Storage Cabinet secondary coolant cabinet inlet temperature. CEC = (Qrt + QCP) (t tdt) / (COP 1000) 2 5.2.2 Calculation of FEC. The FEC shall be measured data for all fan motors or calculated data using the motor efficiency: FEC = (Pf tf) / (1000) 3 Where: Pf = (Pfi n)(measured) Pf= (Pfo n
49、) / (m) (calculated) 5.2.3 Calculation of LEC. LEC = (Pli tl) / (1000) 4 5.2.4 Calculation of AEC. AEC = (Pai ta) / (1000) 5 5.2.5 Calculation of DEC. DEC = (Pd td) / (1000) 6 5.2.6 Calculation of PEC. PEC = (Pc tc) / (1000) 7 5.2.7 Calculation of CPEC. 5.2.7.1 Off-Cycle Defrost. For cabinets with secondary coolant pressure drop values equal to or less than 45 kPa, use the formula CPEC = M K1 (t-tdt)/1000 8 Where: AHRI STANDARD 1321 (SI)-2011 5 K1= 2.5 Watts per LPM For cabinets with se
