AHRI 1361 SI-2013 Performance Rating of Computer and Data Processing Room Air Conditioners.pdf

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1、 2013 Standard for Performance Rating of Computer and Data Processing Room Air Conditioners AHRI Standard 1361 (SI) 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 SA

2、FETY 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, assembl

3、ed, 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 no

4、t 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 I-P ratings, see AHRI Standard 1360 (I-P)-2013. TABLE OF CONTENTS SECTION PAGE Section 1. Purpose 1 Section 2. Scope .1 Section 3. Definitions

5、.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 Data .10 Section 9. Conformance .11 TABLES Table 1. Standard Rating Conditions 5 FIGURES Figure 1. Different

6、CDPR Unit Configurations .1 APPENDICES Appendix A. References Normative 12 Appendix B. References Informative 12 AHRI STANDARD 1361 (SI)-2013 1 PERFORMANCE RATING OF COMPUTER AND DATA PROCESSING ROOM AIR CONDITIONERS Section 1. Purpose 1.1 Purpose. The purpose of this standard is to establish for Co

7、mputer and Data Processing Room Air Conditioners: definitions; classification; test requirements; rating requirements, minimum data requirements for Published Ratings; marking and nameplate data; and conformance conditions. 1.1.1 Intent. This standard is intended for the guidance of the industry, in

8、cluding 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 Scope. This standard applies to floor mounted Computer and Data Processing Room Air Conditioners (CDPR) which

9、 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 individual assemblies, such as condensing units or direct expansion fan-coil units, for separate use. Figure

10、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/index.php/ASHRAEwiki) unless otherwise defined in this section. 3.1 Computer and Data Processing Room Air Cond

11、itioner (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, an air-moving device and air-filtering devices. The air conditioner may include a compressor, condenser, hum

12、idifier 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 in this standard are based upon the use of matched assemblies. The functions of a CDPR air conditioner, eithe

13、r 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 1361 (SI)-2013 2 3.2 Computer Room Air Conditioner (CRAC). Computer-room cooling units that utilize dedicated compressors and re

14、frigerant 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 compressors. 3.4 Dehumidification Capacity. Dehumidification Capacity shall be stated as the units total laten

15、t 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 tested per the Standard Rating Conditions. Input ratings shall be the total power input to the unit; included but

16、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 through an indoor heat exchanger to provide cooling during lower outdoor ambient conditions, in order to reduce

17、 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 utilized for heat rejection. This process is sometimes referred to as free cooling, econ-o-coil, or economizer. 3

18、.6 Humidification Capacity. Humidification Capacity shall be stated as both total and net Humidification Capacity. The total Humidification Capacity reflects the units total humidification output without the mechanical cooling system operating when tested per the manufacturers literature at Standard

19、 Rating Conditions. The net Humidification Capacity shall reflect the units total humidification output when concurrently operating the mechanical cooling system at full capacity and humidification system per manufactures literature at Standard Rating Conditions. Input ratings shall be the total pow

20、er 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). An NSenCOP value that provides a consistent evaluation of the energy efficiency of a unit operated across the

21、 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 power input in watts (excluding reheaters and humidifiers) at any given set of rating conditions. 3.9 Net Sensible

22、 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 Capacity. The rate, expressed in kW, at which the equipment removes heat from the air passing through it under sp

23、ecified 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 chosen to fit its application. These values apply to all units of like nominal size and type (identification) produc

24、ed 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 or other literature controlled by the manufacturer, at stated Rating Conditions. 3.11.1 Standard Rating. A ratin

25、g 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 Conditions). 3.12 Rating Conditions. Any set of operating conditions under which a single level of performance results a

26、nd 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,” “Should,” “Recommended,” or “It Is Recommended.” “Shall,” “should,” “recommended,” or “it is recom-mended” shal

27、l be interpreted as follows: AHRI STANDARD 1361 (SI)-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 standard is claimed. 3.13.2 Should, Recommended, or It Is Recommended. “Should,” “recommended,” or “it is recom

28、mended” is used to indicate provisions which are not mandatory but which are desirable as good practice. 3.14 Standard Air. Air weighing 1.2 kg/m3which approximates dry air at 21C and at a barometric pressure of 101.3 kPa. Section 4. Classification 4.1 Normally, CDPR units within the scope of this s

29、tandard 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 free cooling liquid economizer of a separate building chilled-water system or refrigerant economizer that utilizes sha

30、red 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 humidifier and/or reheat capabilities. Outdoor heat exchange effectiveness may be enhanced with adiabatic or indirect

31、 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 and condenser while the indoor part of the unit is an evaporator and blower. 4.1.3 Unit with Remote Condenser. The re

32、mote 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 Cooler or Cooling Tower. The indoor part of the unit contains the compressor(s), evaporator coil, fan, and condenser

33、. 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 cooling coil for air-to-liquid heat transfer. 4.1.5 Chilled-Water Unit. The indoor part of the unit is an air handler

34、 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 conducted in accordance with ANSI/ASHRAE Standard 127. 5.1.1 Horizontal Free Air Discharge System. For these systems, th

35、e 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 split systems, the interconnecting piping length shall be specified as per ANSI/AHRI Standard 340/360. 5.1.3 Humidificat

36、ion Capacity Test. Testing for Humidification Capacity shall be sampled at 5 minute intervals for a total of 13 readings in one hour. AHRI STANDARD 1361 (SI)-2013 4 Section 6. Rating Requirements Section 6 describes all of the testing and rating requirements for this standard. 6.1 Cooling System Sta

37、ndard 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 established at the Standard Rating Conditions specified in rated cooling Test A of Table 1 for each application class that appl

38、ies 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 into the conditioned space by the fan system. 6.1.1 Values of Standard Capacity Ratings. These ratings shall be expressed

39、 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. 6.1.2.1 Standard Cooling System Rating Temperatures. All indoor and outdoor conditions for testing are defined in Table

40、 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 apply. 6.1.2.2 Voltage and Frequency. Nameplate voltages for 60 Hz shall be one or more of the following utilization vol

41、tages: 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 ratings, standard rating tests shall be performed at both voltages or at the lower of the two voltages if only a single

42、 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 cooling system ratings shall be determined at a total airflow rate (cooling coil airflow rate plus bypass airflow rate

43、 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 applications shall not exceed 290 CMH/kW and Class 3 and 4 applications shall not exceed 220 CMH/kW. Air conditioners shall

44、be rated at those airflow rate 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 standard rating test, no further adjustment to the airflow rate shall be made. 6.1.2.4 Condenser/Air Cooled Fluid Cooler Air

45、flow 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 rate that is inherent to the air conditioner when operated with all the resistance elements associated with the inlet or dis

46、charge attachments that the manufacturer considers normal installation practice. If fan speed control, or partial fan operation in a multifan condenser, is utilized for condensing temperature control, it may be utilized in this test as defined by the manufacturer. Airflow rates must be expressed as

47、cubic meters per hour (CMH) of standard air (density = 1.2 kg/m3). AHRI STANDARD 1361 (SI)-2013 5 Table 1. Standard Rating Conditions1 Type Fluid Conditions Application Classes Rated Cooling Tests Humidifi-cationDehumidifi-cationA B7 C7 D2,7 Air temperature surrounding indoor part of unit (control i

48、s on return temperature) Return dry-bulb temperature, C Class 1 24.0 24.0 24.0 24.0 24.0 24.0 Class 2 29.5 29.5 29.5 29.5 Class 3 35.0 35.0 35.0 35.0 Class 4 40.5 40.5 40.5 40.5 Return dew-point temperature, C All Classes 11.0 11.0 11.0 11.0 5.5 15.0 Air-cooled units: entering outdoor ambient temper

49、ature.8Dry-bulb temperature, C All Classes 35.0 26.5 18.5 4.5 18.5 35.0 Evaporative-cooled units (connected to cooling tower)5 Entering water temperature, C All Classes 28.5 21.0 13.0 7.0 13.0 28.5 Leaving water temperature, C All Classes 35.0 N/A N/A N/A N/A 35.0 Fluid Flow Rate, L/s All Classes N/A Max = Test A3 Max = Test A3 Max = Test A3 Max = Test A3 Max = Test A Glycol-cooled units (connected to a common glycol loop with a solution of 40% propylene glycol by volume)6 Entering glycol temperature, C All Classes 40.0 29.5 18.5 1.5 18.5 40.0 Leaving glycol tempera