1、ASHRAE STANDARDAmerican Society of Heating, Refrigeratingand Air-Conditioning Engineers, Inc.1791 Tullie Circle NE, Atlanta, GA 30329www.ashrae.orgMethod of Test forRating IndirectEvaporative CoolersANSI/ASHRAE Standard 143-2007(Supersedes ANSI/ASHRAE Standard 143-2000)Approved by the ASHRAE Standar
2、ds Committee on June 23, 2007; by the ASHRAE Board of Directors on June 27,2007; and by the American National Standards Institute on June 28, 2007.ASHRAE Standards are scheduled to be updated on a five-year cycle; the date following the standard number isthe year of ASHRAE Board of Directors approva
3、l. The latest copies may be purchased from ASHRAE CustomerService, 1791 Tullie Circle, NE, Atlanta, GA 30329-2305. E-mail: ordersashrae.org. Fax: 404-321-5478. Tele-phone: 404-636-8400 (worldwide) or toll free 1-800-527-4723 (for orders in US and Canada). Copyright 2007 ASHRAE, Inc.ISSN 1041-2336www
4、.ansi.orgASHRAE STANDARDS COMMITTEE 2006-2007David E. Knebel, ChairStephen D. Kennedy, Vice-ChairMichael F. BedaDonald L. BrandtSteven T. BushbyPaul W. CabotHugh F. CrowtherSamuel D. Cummings, Jr.Robert G. DoerrRoger L. HedrickJohn F. HoganEli P. Howard, IIIFrank E. JakobJay A. KohlerJames D. LutzCa
5、rol E. MarriottMerle F. McBrideMark P. ModeraRoss D. MontgomeryH. Michael NewmanStephen V. SantoroLawrence J. SchoenStephen V. SkalkoBodh R. SubherwalJerry W. White, Jr.James E. WoodsRichard D. Hermans, BOD ExOHugh D. McMillan III, COClaire B. Ramspeck, Assistant Director of Technology for Standards
6、 and Special ProjectsSPECIAL NOTEq=k=p=EkpF=p=eI=o=J=b=EpeobFK=Consensus=k=pf=EkpfFI=peob=kpI=applelogo=K=q=I=K=I=K=Kpeob=I=I=Kpeob=p=m=pK=q=m=sJ=peobX=peob=I=pK=b=mKq=a=q=p=p=m=peob=WK=pIK=pIK=pI=K=pKDISCLAIMERpeob=p=d=K=eI=peob=I=I=I=I=I=I=peob=p=d=p=d=KASHRAE INDUSTRIAL ADVERTISING POLICY ON STAN
7、DARDSpeob=p=d=I=I=I=K=q=peob=p=d=I=Kf=p=d=I=I=I=peobKASHRAE Standard Project Committee 143Cognizant TC: TC 5.7, Evaporative CoolingSPLS Liaison: James E. WoodsPatricia Thomas Graef, Chair*Daniel Harmeyer*Branislav Korenic*Gursaran D. Mathur*Leon Shapiro*Michael S. Sherber*Denotes members of voting s
8、tatus when the document was approved for publicationCONTENTSANSI/ASHRAE Standard 143-2007Method of Test for Rating Indirect Evaporative CoolersSECTION PAGEcKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
9、KKKKKKKKKKKKKKKKKKK ON=mKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK OO=p KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
10、KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK OP=aKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK OQ=p=pKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
11、KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK RR=KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK SS=KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
12、KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK ST=oKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK SU=fKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
13、KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK SV=KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK UNM=j=qKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
14、KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK VNN=oKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK NMNO=q=oKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
15、KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK NONP=o KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK NPf=W=_KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
16、KKKKKKKKKOPf=_W=o=oKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKOPf=W=o=m KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKOPNOTEWhen addenda, interpretations, or errata to this standard have
17、 been approved, they can be downloadedfree of charge from the ASHRAE Web site at http:/www.ashrae.org. Copyright 2007 American Society of Heating,Refrigerating and Air-Conditioning Engineers, Inc.1791 Tullie Circle NEAtlanta, GA 30329www.ashrae.orgAll rights reserved.2 ANSI/ASHRAE standard 143-2007(
18、This foreword is not part of this standard. It is merelyinformative and does not contain requirements necessaryfor conformance to the standard. It has not beenprocessed according to the ANSI requirements for astandard and may contain material that has not beensubject to public review or a consensus
19、process.Unresolved objectors on informative material are notoffered the right to appeal at ASHRAE or ANSI.)FOREWORD First published in 2000, ASHRAE Standard 143 pro-vides procedures for testing indirect evaporative coolingdevices under laboratory conditions to obtain rating infor-mation. As an ASHRA
20、E method-of-test standard, it isintended to offer recommended practices and accurate mea-surement procedures.This revision makes two key changes to Standard 143-2000. First, the difference between the primary dry-bulb tem-perature and secondary wet-bulb temperature has beendecreased from 25F to 20F
21、(14C to 11C). This reductionwill increase the times when testing can be accomplishedusing unconditioned air without reducing the accuracy of thetest. Second, to provide greater flexibility, temperature mea-surement in Section 8.1.1 is no longer limited to specifictypes of instruments as long as they
22、 meet the requirements ofANSI/ASHRAE Standard 41.1, Standard Method for Tem-perature Measurement.Various other improvements were made as well. All ref-erences were updated to the latest editions, and several typo-graphical errors were corrected. Mandatory language wasclarified by changing “will” to
23、“shall.”1. PURPOSEThis standard provides test procedures and calculationsfor establishing the cooling capacities and power requirementsfor indirect evaporative cooling equipment.2. SCOPE 2.1 This standard covers testing under steady-state condi-tions for rating of indirect evaporative coolers thata.
24、 sensibly cool a primary airstream through heatexchanger(s) by the evaporation of water into a secondaryairstream andb. are self-contained or are components of packaged systems.2.2 This standard does not covera. devices that use mechanical refrigeration or thermal stor-age to cool the primary airstr
25、eam, the secondary air-stream, or the water provided for evaporation orb. devices that dry the primary or secondary airstream.3. DEFINITIONS adiabatic saturation: evaporating water into air without exter-nal gain or loss of heat. Sensible heat in both air and waterbecomes latent heat in entrained va
26、por, and temperatures falland equalize.air density: the mass per unit volume of the air.application rating: a rating based on tests performed at appli-cation rating conditions (other than standard rating condi-tions).component indirect evaporative cooler (IEC module): anindirect evaporative cooling
27、device consisting of an indirectevaporative cooling heat exchanger, a means of delivering anddistributing water to the wet passages of the heat exchanger, abasin for collecting water, a recirculating water pump, and thepiping that connects the basin and the water distributionsystem. (See Figure 3.)c
28、ooling effectiveness: the primary air dry-bulb temperaturereduction divided by the primary air entering dry-bulb temper-ature less the entering secondary wet-bulb temperature.determination: a complete set of measurements for a partic-ular point of operation of an IECU. The measurements must besuffic
29、ient to determine all IECU performance variables asdefined in this standard.IECU: an acronym created for use in this document, whichstands for a packaged, semi-packaged, or component indirectevaporative cooling unit. The term cooling unit is also usedinterchangeably throughout this document for evap
30、orativecooling unit or evaporative cooler.IECU air boundaries: indirect evaporative cooling unit inletand outlet boundaries are defined as the interface between thecooling unit and the remainder of the system and are at a planeperpendicular to the airstream where it enters or leaves theindirect evap
31、orative cooling unit. Various appurtenances, suchas filter media assemblies, inlet boxes, inlet vanes, inlet cones,silencers, screens, rain hoods, dampers, discharge cones, andeaves, may be included as part of the cooling unit between theinlet and outlet boundaries.IECU air density: the density of t
32、he air corresponding to thetotal pressure and dry- and wet-bulb temperatures at the cool-ing unit inlet.IECU inlet area: the gross inside area measured in theplane(s) of the inlet connection(s). For converging inlets with-out connection elements, the inlet area shall be considered tobe where a plane
33、, perpendicular to the airstream, first meetsthe bell mouth or cone.IECU input power boundary: the interface of the wiringentering electrically powered equipment. Drive or couplinglosses are included as part of the input power.IECU outlet area: the gross inside area measured in theplane(s) of the ou
34、tlet opening(s).IECU total power: the sum of the power in watts supplied tothe electrical components of the indirect evaporative coolertested. This includes fan motors, pump motors, and otherdevices needed to produce the cooling effect. The power tocontrol devices such as thermostats, transformers p
35、rovidinglow voltage to control mechanisms, and freeze protectiondevices need not be included in total power.IECU total pressure: the difference between the total pressureat the cooling unit outlet and the total pressure at the coolingunit inlet.ANSI/ASHRAE standard 143-2007 3IECU velocity pressure:
36、the pressure corresponding to theaverage velocity at the cooling unit outlet.energy factor: the ratio of the total kinetic energy of the flowto the kinetic energy corresponding to the average velocity.evaporative cooling: cooling that evaporates water to cool airby one of two methods: (1) direct, wh
37、ich is adiabatic andhumidifies the air, and (2) indirect, which is nonadiabatic andcools the air being treated.fan: a device for moving air that utilizes a power-driven rotat-ing impeller. A fan shall have at least one inlet opening and atleast one outlet opening. The openings may or may not haveele
38、ments for connection to ductwork.fan motor power: the electric power required to drive the fanand any elements in the drive train that are considered a partof the fan.fan speed: the rotative speed of the impeller. If a fan has morethan one impeller, fan speeds are the rotative speeds of eachimpeller
39、.free delivery: the point of operation where the external staticpressure is zero.indirect evaporative cooler: a heat and mass transfer deviceused to sensibly cool a primary airstream, without addition ofmoisture, by means of an evaporatively cooled secondaryairstream. Since the secondary air provide
40、s wet-bulb depres-sion, it represents a heat sink to the primary air.indirect evaporative cooler with integrated heat exchanger:an indirect evaporative cooling device with integrated primary(dry) and secondary (wet) air passages in a single sensible andevaporative heat exchanger. (See Figure 1.)indirect evaporative cooler with nonintegrated heat ex-changer: an indirect evaporative cooling device with a sepa-rate primary (dry) sensible heat exchanger and a separatesecondary (wet) evaporative heat exchanger. The recircu-lating
