AHRI 1360 I-P-2013 Performance Rating of Computer and Data Processing Room Air Conditioners.pdf

1、 2013 Standard for Performance Rating of Computer and Data Processing Room Air Conditioners AHRI Standard 1360 (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 S

2、AFETY 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 strongly recommended that products be designed, constructed, assemb

3、led, 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 employing state-of-the-art and accepted industry practices. AHRI does n

4、ot certify or guarantee that any tests conducted under the standards/guidelines will not be non-hazardous or free from risk. Note: This is a new standard. For SI ratings, see AHRI Standard 1361 (SI)-2013. AHRI CERTIFICATION PROGRAM PROVISIONS Certified Ratings The following Certification Program rat

5、ings are verified by test: 1. Net Total Cooling Capacity at Rated Cooling Test A (Table 1), kW 2. Net Sensible Cooling Capacity at Rated Cooling Test A (Table 1), kW 3. Net Sensible Coefficient of Performance Rating (NSenCOP) at Rated Cooling Tests A 4. Airflow rate, scfm 5. Fluid Flow Rate (for Wat

6、er, Glycol, and Chilled Water Units only), gpm 6. Fluid Pressure Drop (for Water, Glycol, and Chilled Water Units only), psid 7. Fluid Economizer System Flow Rate (for Water, Glycol, and Chilled Water Units only), gpm 8. Fluid Economizer System Pressure Drop (for Water, Glycol, and Chilled Water Uni

7、ts only), psid TABLE OF CONTENTS SECTION PAGE Section 1. Purpose 1 Section 2. Scope .1 Section 3. Definitions.1 Section 4. Classification.3 Section 5. Test Requirements 3 Section 6. Rating Requirements .4 Section 7. Minimum Data Requirements for Published Ratings .8 Section 8. Marking and Nameplate

8、Data .10 Section 9. Conformance .11 TABLES Table 1. Standard Rating Conditions 5 FIGURES Figure 1. Different CDPR Unit Configurations .1 APPENDICES Appendix A. References Normative 12 Appendix B. References Informative 12 AHRI STANDARD 1360 (I-P)-2013 1 PERFORMANCE RATING OF COMPUTER AND DATA PROCES

9、SING ROOM AIR CONDITIONERS Section 1. Purpose 1.1 Purpose. The purpose of this standard is to establish for Computer and Data Processing Room Air Conditioners: definitions; classification; test requirements; rating requirements, minimum data requirements for Published Ratings; marking and nameplate

10、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 Amendment. This standard is subject to review and amendment as technology advances. Section 2. Scope 2.1

11、 Scope. This standard applies to floor mounted Computer and Data Processing Room Air Conditioners (CDPR) which have three types: up-flow air discharge, down-flow air discharge and horizontal free air discharge, as illustrated in Figure 1. 2.2 Exclusions. This standard does not apply to the rating of

12、 individual assemblies, such as condensing units or direct expansion fan-coil units, for separate use. Figure 1. Different CDPR Unit Configurations. Section 3. Definitions All terms in this document will follow the standard industry definitions in the ASHRAE Wikipedia website (http:/wiki.ashrae.org/

13、index.php/ASHRAEwiki) unless otherwise defined in this section. 3.1 Computer and Data Processing Room Air Conditioner (CDPR). A Computer and Data Processing Room Air Conditioner consists of one or more factory-made assemblies, which include a direct expansion evaporator or chilled water cooling coil

14、, an air-moving device and air-filtering devices. The air conditioner may include a compressor, condenser, humidifier or reheating function. Where direct expansion equipment is provided in more than one assembly and the separate assemblies are to be used together, the requirements of rating outlined

15、 in this standard are based upon the use of matched assemblies. The functions of a CDPR air conditioner, either alone or in combination with a cooling and heating plant, are to provide air filtration, circulation, cooling, and optional reheating and humidity control. AHRI STANDARD 1360 (I-P)-2013 2

16、3.2 Computer Room Air Conditioner (CRAC). Computer-room cooling units that utilize dedicated compressors and refrigerant cooling coils rather than chilled-water coils. 3.3 Computer Room Air Handler (CRAH). Computer-room cooling units that utilize chilled-water coils for cooling rather than dedicated

17、 compressors. 3.4 Dehumidification Capacity. Dehumidification Capacity shall be stated as the units total latent removal when in the full dehumidification mode of operation. This value shall be calculated as the difference between Net Total Cooling Capacity and Net Sensible Cooling Capacity when tes

18、ted per the Standard Rating Conditions. Input ratings shall be the total power input to the unit; included but not limited to fan motor(s), compressor(s), damper(s) and control(s) etc. 3.5 Fluid Economizer. An option available with a CRAC or CRAH system in which a cold fluid is circulated by a pump

19、through an indoor heat exchanger to provide cooling during lower outdoor ambient conditions, in order to reduce or eliminate compressor operation. The fluid could be chilled water, water/glycol solution, or refrigerant. An external fluid cooler such as a dry cooler, cooling tower, or condenser is ut

20、ilized for heat rejection. This process is sometimes referred to as free cooling, econ-o-coil, or economizer. 3.6 Humidification Capacity. Humidification Capacity shall be stated as both total and net Humidification Capacity. The total Humidification Capacity reflects the units total humidification

21、output without the mechanical cooling system operating when tested per the manufacturers literature at Standard Rating Conditions. The net Humidification Capacity shall reflect the units total humidification output when concurrently operating the mechanical cooling system at full capacity and humidi

22、fication system per manufactures literature at Standard Rating Conditions. Input ratings shall be the total power input to the unit; included but not limited to fan motor(s), humidifier(s), compressor(s), damper(s) and control(s) etc. 3.7 Integrated Net Sensible Coefficient of Performance (iNSenCOP)

23、. An NSenCOP value that provides a consistent evaluation of the energy efficiency of a unit operated across the specified range of outdoor ambient temperatures (see Table 1). 3.8 Net Sensible Coefficient of Performance (NSenCOP). A ratio of the Net Sensible Cooling Capacity in watts to the total pow

24、er input in watts (excluding reheaters and humidifiers) at any given set of rating conditions. 3.9 Net Sensible Cooling Capacity. The rate, expressed in kW, at which the equipment removes sensible heat from the air passing through it under specified conditions of operation. 3.10 Net Total Cooling Ca

25、pacity. The rate, expressed in kW, at which the equipment removes heat from the air passing through it under specified conditions of operation. 3.11 Published Rating. A statement of the assigned values of those performance characteristics, under stated Rating Conditions, by which a unit may be chose

26、n to fit its application. These values apply to all units of like nominal size and type (identification) produced by the same manufacturer. As used herein, the term Published Rating includes the rating of all performance characteristics shown on the unit or published in specifications, advertising o

27、r other literature controlled by the manufacturer, at stated Rating Conditions. 3.11.1 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.11.2 Application Rating. A rating based on tests performed at application Rating Conditions (other than Standard Rating Condition

28、s). 3.12 Rating Conditions. Any set of operating conditions under which a single level of performance results and which cause only that level of performance to occur. 3.12.1 Standard Rating Conditions. Rating Conditions used as the basis of comparison for performance character-istics. 3.13 “Shall,”

29、“Should,” “Recommended,” or “It Is Recommended.” “Shall,” “should,” “recommended,” or “it is recom-mended” shall be interpreted as follows: AHRI STANDARD 1360 (I-P)-2013 3 3.13.1 Shall. Where “shall” or “shall not” is used for a provision specified, that provision is mandatory if compliance with the

30、 standard is claimed. 3.13.2 Should, Recommended, or It Is Recommended. “Should,” “recommended,” or “it is recommended” is used to indicate provisions which are not mandatory but which are desirable as good practice. 3.14 Standard Air. Air weighing 0.075 lb/ft3which approximates dry air at 70F and a

31、t a barometric pressure of 29.92 in Hg. Section 4. Classification 4.1 Normally, CDPR units within the scope of this standard can be classified as shown below. There are five basic types of CDPRs. Any of the below types may utilize a second, or dual, cooling coil that provides cooling by means of a f

32、ree cooling liquid economizer of a separate building chilled-water system or refrigerant economizer that utilizes shared heat exchangers with the compressor based system and where refrigerant is moved my refrigerant pump or natural refrigerant convection. Any of the below types may contain internal

33、humidifier and/or reheat capabilities. Outdoor heat exchange effectiveness may be enhanced with adiabatic or indirect evaporative cooling. 4.1.1 Single Packaged Unit. A complete stand-alone unit. 4.1.2 Condensing Units with Separate Coil and Fan. The remote part of this unit contains the compressor

34、and condenser while the indoor part of the unit is an evaporator and blower. 4.1.3 Unit with Remote Condenser. The remote part of this unit is an air-cooled condenser only, while the indoor part of the unit contains the compressor(s), evaporator coils and fan. 4.1.4 Unit with Remote Air-Cooled Fluid

35、 Cooler or Cooling Tower. The indoor part of the unit contains the compressor(s), evaporator coil, fan, and condenser. The heat rejection is by means of a remote device (a cooling tower or air-cooled fluid cooler) that uses water or glycol to transfer heat. Such units may also include an additional

36、cooling coil for air-to-liquid heat transfer. 4.1.5 Chilled-Water Unit. The indoor part of the unit is an air handler with a water-cooled coil that is connected to the building chilled-water system. Section 5. Test Requirements 5.1 Test Requirements. The tests required for this Standard shall be con

37、ducted in accordance with ANSI/ASHRAE Standard 127. 5.1.1 Horizontal Free Air Discharge System. For these systems, the static duct shall be 12 inches wider on each side and equal in height to the discharge opening of the unit under test. 5.1.2 Split Systems Interconnecting Piping. For air-cooled spl

38、it systems, the interconnecting piping length shall be specified as per ANSI/AHRI Standard 340/360. 5.1.3 Humidification Capacity Test. Testing for Humidification Capacity shall be sampled at 5 minute intervals for a total of 13 readings in one hour. AHRI STANDARD 1360 (I-P)-2013 4 Section 6. Rating

39、 Requirements Section 6 describes all of the testing and rating requirements for this standard. 6.1 Cooling System Standard Capacity Ratings. Rated cooling is defined as 100% of the units maximum capacity and is sometimes referred to as a Standard Rating. Standard capacity ratings shall be establish

40、ed at the Standard Rating Conditions specified in rated cooling Test A of Table 1 for each application class that applies for this equipment. Standard Cooling Capacity shall be stated as Net Total and Net Sensible Cooling Capacity ratings and shall be net values, reflecting the energy dissipated int

41、o the conditioned space by the fan system. 6.1.1 Values of Standard Capacity Ratings. These ratings shall be expressed in terms of kW with three significant digits (e.g., 10.0 kW and 100 kW). 6.1.2 Standard Rating Conditions. The conditions of test for standard ratings shall include the following. 6

42、.1.2.1 Standard Cooling System Rating Temperatures. All indoor and outdoor conditions for testing are defined in Table 1. Also defined in Table 1 are the various air and fluid temperatures that shall be used for heat rejection purposes. A unit shall be rated at all of the application classes that ap

43、ply. 6.1.2.2 Voltage and Frequency. Nameplate voltages for 60 Hz shall be one or more of the following utilization voltages: 115, 200, 208, 230, 265, 460, and/or 575. Standard rating tests shall be performed at the unit nameplate rated voltages and frequency. For air conditioners with dual voltage r

44、atings, standard rating tests shall be performed at both voltages or at the lower of the two voltages if only a single standard rating is to be published. If desired, 50 Hz ratings at 230 and/or 400 volts may be published using this standard but are not required. 6.1.2.3 Unit Airflow Rate. Standard

45、cooling system ratings shall be determined at a total airflow rate (cooling coil airflow rate plus bypass airflow rate as configured or designed) delivered against at least the minimum external static pressures required by Section 6.1.2.6, as outlined below. The airflow rate for Class 1 and 2 applic

46、ations shall not exceed 170 scfm/kW and Class 3 and 4 applications shall not exceed 130 scfm/kW. Air conditioners shall be rated at those airflow rates specified by the manufacturer while in the rated cooling mode at conditions in Test A of Table 1. Once these conditions are established for this sta

47、ndard rating test, no further adjustment to the airflow rate shall be made. 6.1.2.4 Condenser/Air Cooled Fluid Cooler Airflow Rate. Standard ratings for units that are air cooled or glycol cooled with an air-cooled fluid cooler shall be determined at the condenser/air-cooled fluid cooler airflow rat

48、e that is inherent to the air conditioner when operated with all the resistance elements associated with the inlet or discharge attachments that the manufacturer considers normal installation practice. If fan speed control, or partial fan operation in a multifan condenser, is utilized for condensing

49、 temperature control, it may be utilized in this test as defined by the manufacturer. Airflow rates must be expressed as standard cubic feet per minute (scfm) standard air (density = 0.0749 lb/ft3). AHRI STANDARD 1360 (I-P)-2013 5 Table 1. Standard Rating Conditions1 Type Fluid Conditions Appli-cation Classes Rated Cooling Tests Humidifi-cationDehumidi-ficationA B7 C7D2,7 Air Temperature Surrounding and Entering Indoor Part of unit (control is on return temperature) Return Dry-bulb temperature, F Class 1 75.0 75.0 75.0 75.0 75.0 75.0 Class 2 85.0 85.0 85.0 85.0 Class 3 9