AHRI 1110 I-P-2013 Performance Rating of Mechanical Transport Refrigeration Units.pdf

1、 2013 Standard for Performance Rating of Mechanical Transport Refrigeration Units AHRI Standard 1110 (I-P) Price $15.00 (M) $30.00 (NM) Copyright 2013, by Air-Conditioning Heating and Refrigeration Institute Printed in U.S.A. Registered United States Patent and Trademark Office IMPORTANT SAFETY DISC

2、LAIMER 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 strongly recommended that products be designed, constructed, assembled, insta

3、lled 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 employing state-of-the-art and accepted industry practices. AHRI does not certify

4、or guarantee that any tests conducted under the standards/guidelines will not be non-hazardous or free from risk. Note: This standard supersedes AHRI Standard 1110-2006. For SI ratings, see AHRI Standard 1111 (SI)-2013. The AHRI Mechanical Transport Refrigeration (TR) Certification Program will cert

5、ify only to AHRI Standard 1110 (I-P)-2013. AHRI Standard 1111 (SI)-2013 will not be used for the TR Certification Program. AHRI CERTIFICATION PROGRAM PROVISIONS Refer to the Mechanical Transport Refrigeration Unit Certification Program Operational Manual, OM-1110, for the governing policies of the C

6、ertification Program. Certified Ratings The following certification program ratings are verified by test: 1. High Temperature Cooling Capacity, Btuh 2. Low Temperature Cooling Capacity, Btuh 3. Electric Standby High Temperature Cooling Capacity, Btuh 4. Electric Standby Low Temperature Cooling Capac

7、ity, Btuh TABLE OF CONTENTS SECTION 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. Minimum Data Requirements for Published Ratings .4 Section 7. Operating Requirements .5 Section 8. Marking and Namepla

8、te Data .5 Section 9. Conformance Conditions 5 TABLES Table 1. Standard Rating Conditions 3 APPENDICES Appendix A. References - Normative 6 Appendix B. References - Informative 6 Appendix C. Calibrated-Box Method of Testing for Rating Mechanical Transport Refrigeration Units - Normative .7 Appendix

9、D. Isothermal-Box Method of Testing for Rating Mechanical Transport Refrigeration Units Normative 14 TABLES FOR APPENDICES Table C1. Calibrated-Box Test Tolerances .10 Table D1. Isothermal-Box Test Tolerances .18 FIGURES FOR APPENDICES Figure C1. Calibrated-Box Test Setup Schematic 8 Figure C2. Ambi

10、ent Area Temperature Measuring Station Location Diagram 9 Figure C3. Calibrated-Box Temperature Measuring Station Location Diagram 9 Figure D1. Isothermal-Box Test Setup Schematic .15 Figure D2. Surround Area Temperature Measuring Station Location Diagram .16 Figure D3. Isothermal-Box Temperature Me

11、asuring Station Location Diagram .16 _AHRI STANDARD 1110-2013 (I-P) 1 PERFORMANCE RATING OF MECHANICAL TRANSPORT REFRIGERATION UNITS Section 1. Purpose 1.1 Purpose. The purpose of this standard is to establish for Mechanical Transport Refrigeration Units: definitions; test requirements; rating requi

12、rements; minimum data requirements for Published Ratings; operating requirements; marking and nameplate data; and conformance conditions. 1.1.1 Intent. This standard is intended for the guidance of the industry, including manufacturers, engineers, installers, contractors and users. 1.1.2 Review and

13、Amendment. This standard is subject to review and amendment as technology advances. Section 2. Scope 2.1 Scope. This standard applies to encased direct expansion vapor compression type Mechanical Transport Refrigeration Units with the following components: 2.1.1 Compressor 2.1.2 Air-cooled condenser

14、 2.1.3 Refrigerant flow control(s) 2.1.4 Forced-Circulation Air-Cooler 2.1.5 Base or frame 2.1.6 Prime Mover as described in the unit manufacturers literature 2.1.7 Power Train (coupling, power take-off, transmission, V-belt drive, etc.) connecting the unit to the Prime Mover Section 3. Definitions

15、All terms in this document will follow the standard industry definitions in the ASHRAE Wikipedia website (http:/wiki.ashrae.org/index.php/ASHRAEwiki) unless otherwise defined in this section. 3.1 Ambient Air. 3.1.1 The air surrounding the vehicle served by the Mechanical Transport Refrigeration Unit

16、. 3.1.2 The air in the test enclosure surrounding the Calibrated-Box, per the calibrated-box method of testing. 3.1.3 The air surrounding the engine-condenser side of a Mechanical Transport Refrigeration Unit, per the isothermal-box method of testing. 3.2 Calorimeter. A test facility consisting of o

17、ne or two rooms, which may have an annular space(s); each equipped with instrumented reconditioning equipment. The output of this equipment is measured and controlled to counterbalance the Net Refrigerating Capacity of the Mechanical Transport Refrigeration Unit under test. 3.2.1 Calibrated-Box. A w

18、ell-insulated enclosure, with a known heat transfer rate determined through calibration, which is used for measuring the heat loss or gain between the enclosures interior temperature and ambient temperature. The area surrounding the entire exterior of the Calibrated-Box is maintained at the rated am

19、bient air temperature. 3.2.2 Isothermal-Box. A well-insulated enclosure, with a known heat transfer rate determined through calibration, which is used for measuring the heat loss or gain between the enclosures interior temperature and ambient temperature. The area surrounding the Isothermal-Box is d

20、ivided into a Surround Area and an ambient space. The Surround Area is maintained at the rated return air temperature to the Forced-Circulation Air-Cooler, while the ambient space is maintained at the rated ambient air temperature. AHRI STANDARD 1110-2013 (I-P) 2 3.3 Forced-Circulation Air-Cooler. A

21、 factory-made assembly including means for forcing air circulation and components where heat is transferred from air to refrigerant. The purpose of this unit is to transfer heat from a refrigerated space, through the medium of air, to the refrigerant. 3.4 High-Temperature Service. Service requiring

22、the maintenance of air temperature at a value of 25F or above in the refrigerated compartment of the vehicle typically transporting non-frozen product. 3.5 Low-Temperature Service. Service requiring the maintenance of air temperature at a value below 25F in the refrigerated compartment of the vehicl

23、e typically transporting frozen product. 3.6 Mechanical Transport Refrigeration Unit. A combination of one or more of the following factory-made assemblies: 3.6.1 A compressor, drive, and condenser combination 3.6.2 A Forced-Circulation Air-Cooler 3.6.3 All necessary refrigerant lines and electrical

24、 wiring 3.6.4 Means whereby the unit can be suitably mounted and installed on a vehicle which it is intended to serve. Where such equipment is used in more than one assembly, the individual assemblies are designed to be used together, and the requirements of rating outlined in this standard are base

25、d on the use of matched assemblies. 3.7 Net Refrigerating Capacity. The rate of heat transferred from the air in the refrigerated space to the refrigerant circulated through the Forced-Circulation Air-Cooler, less heat added by the fan and drive, and other sources, in operation under specified condi

26、tions. It is the net refrigerating effect available for useful cooling. 3.8 Observation. A specific instance in time where measurements are recorded. 3.9 Power Train. A mechanical device whereby power received from a primary source of power at a given rotating speed is transferred to a driven device

27、 at the same or a different rotating speed. 3.9.1 Power Train Ratio. The ratio of the rotating speed at which power is delivered to the driven device, to the rotating speed at which power is received from the primary source. 3.10 Prime Mover. An engine, motor or similar device that drives a refriger

28、ation system at a known speed. 3.11 Published Rating. A statement of the assigned values of those performance characteristics, under stated Rating Conditions, by which a unit may be chosen to fit its application. These values apply to all units of like nominal size and type (identification) produced

29、 by the same manufacturer. 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. 3.11.1 Application Rating. A rating based on test

30、s performed at application Rating Conditions (other than Standard Rating Conditions). 3.11.2 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.11.3 Standby Rating. A Published Rating based on using a standby power source and tests performed under Standard Rating Con

31、ditions or application Rating Conditions. 3.12 Rating Conditions. Any set of operating conditions under which a single level of performance results and which causes only that level of performance to occur. 3.12.1 Standard Rating Conditions. Rating Conditions used as the basis of comparison for perfo

32、rmance characteristics. 3.13 “Shall“ or “Should.“ “Shall“ or “should“ shall be interpreted as follows: 3.13.1 Shall. Where “shall“ or “shall not“ is used for a provision specified, that provision is mandatory if compliance with the standard is claimed. 3.13.2 Should. “Should“ is used to indicate pro

33、visions which are not mandatory but are desirable as good practice. _AHRI STANDARD 1110-2013 (I-P) 3 3.14 Standby Drive. A device included in a Mechanical Transport Refrigeration Unit, which receives power from a source external to the vehicle served. The unit may operate to refrigerate the vehicle

34、while it is at rest. 3.15 Surround Area. The enclosure about the Isothermal-Box. 3.16 Test Nominal Condition. The reading that is taken at the initial Observation of the test and is used as a basis of reference for all subsequent observations. 3.16.1 Ambient Nominal Condition. The reference temperat

35、ure for the ambient space of the Calibrated-Box or Isothermal-Box. It is taken as the arithmetic average of the individual temperature measurement stations within the ambient space at the initial Observation of the test. 3.16.2 Box Nominal Condition. The reference temperature for the interior of the

36、 Calibrated-Box or Isothermal-Box. It is taken as the arithmetic average of the individual temperature measurement stations within the Calibrated-Box or Isothermal-Box at the initial Observation of the test. 3.17 Unit-Mounting. Types of mountings for Mechanical Transport Refrigeration Units are: 3.1

37、7.1 Nose-Mounted. A Mechanical Transport Refrigeration Unit in which the condensing unit is mounted on the external front wall of the refrigerated compartment. 3.17.2 Under-Mounted. A Mechanical Transport Refrigeration Unit in which the condensing unit is mounted externally on the bottom of the refr

38、igerated compartment. Section 4. Test Requirements 4.1 Test Requirements. Mechanical Transport Refrigeration Units shall be tested for the rated Net Refrigerating Capacity in accordance with one of the two methods set forth in Appendix C and Appendix D. 4.2 All-Electric Unit. When the unit being tes

39、ted includes an engine-generator set in conjunction with an electric drive, the space in which the engine-generator set is located shall be maintained at the same ambient condition as the condensing section of the Mechanical Transport Refrigeration Unit. Section 5. Rating Requirements 5.1 Standard R

40、atings. Standard Ratings shall be published for the Standard Rating Conditions specified in Table 1. All Standard Ratings shall be verified by tests conducted in accordance with one of the two test methods described in Appendix C and Appendix D. Table 1. Standard Rating Conditions Standard Rating Re

41、turn Air Temperature to Forced- Circulation Air-Cooler Entering Air Temperature to Condenser F F High Temperature 35.0 100.0 Low Temperature 0.0 100.0 NOTE: The unit shall be rated at a compressor driven speed in accordance with manufacturers recommended high speed setting 50 rpm. 5.1.1 Values of St

42、andard Ratings. Standard Ratings at or below 10,000 Btuh shall be Net Refrigerating Capacity and shall be expressed only in terms of Btuh in multiples of 100 Btuh. Standard ratings above 10,000 Btuh shall be Net Refrigerating Capacity and shall be expressed only in terms of Btuh in multiples of 500

43、Btuh. AHRI STANDARD 1110-2013 (I-P) 4 5.2 Application Ratings. Application Ratings shall be expressed in the same terms as Standard Ratings and shall be accompanied by pertinent conditions. 5.3 Standby Ratings. When an electric Standby Drive is provided, the unit shall be rated in accordance with th

44、is standard. The nameplate voltage and frequency of the standby drive motor is measured at the units service connection and under Standard Rating Conditions. 5.4 System Requirements. 5.4.1 Compressor. For all tests, the compressor shall be operated at a rotating speed in accordance with the manufact

45、urers recommended high speed operational setting. During the test, operating speed shall not vary by more than 50 rpm. 5.4.1.1 For an electrically driven compressor, the frequency tolerance shall be in compliance with the rotational tolerance in Section 5.4.1 5.4.2 Condensing Unit. Any engine or mot

46、or hoods, cabinets, louvers, wind deflectors, dampers, fan guards, coil guards, and other furnished components and equipment specified by the manufacturer shall be used during the test. These components shall be installed in accordance with the manufacturers instructions. 5.4.3 Refrigerant. The unit

47、 shall be charged with the refrigerant type and the charge amount as shown on the units nameplate. The unit shall be charged in accordance with the manufacturers published instructions. 5.4.4 Refrigerant Flow Control(s). Refrigerant flow control(s) used during the test shall be the same as that furn

48、ished by the manufacturer. It shall be operated at the manufacturers specified setting. 5.4.5 Forced-Circulation Air-Cooler. Any nozzles, diffusers, cowls, deflecting vanes and other furnished components and equipment shall be used during the test. These components shall be installed in accordance w

49、ith the manufacturers published installation instructions. Under zero external static pressure, tests shall be on completely assembled units with fans operating at normal speed. 5.4.6 Split Systems. For testing purposes, split systems shall be connected by the following minimum lengths of refrigerant tubing and fittings of a type and size furnished or recommended for installation: 5.4.6.1 Under-Mounted: 25 ft 5.4.6.2 Nose-Mounted: 7 ft 5.5 Tolerance. To comply with this standard, measured Net Refrigerating Capacity at rating conditions s