1、Water-source heat pumps Testing and rating forperformance Part 2: Water-to-water andbrine-to-water heat pumpsANSI/AHRI/ASHRAE ISO Standard 13256-2:1998 (RA 2012)Reaffirmation of ANSI/ARI/ASHRAE ISO Standard 13256-2:1998Approved by AHRI on August 10, 2001, and reaffirmed on June 7, 2011; by the ASHRA
2、E Standards Committee on March 20,2002, and reaffirmed on January 21, 2012; by the ASHRAE Board of Directors on July 3, 2003, and reaffirmed on January 25, 2012;and by the American National Standards Institute on August 15, 2003, and reaffirmed on November 3, 2011.ASHRAE Standards are scheduled to b
3、e updated on a five-year cycle; the date following the standard number is the year ofASHRAE Board of Directors approval. The latest edition of an ASHRAE Standard may be purchased on the ASHRAE Web site(www.ashrae.org) or from ASHRAE Customer Service, 1791 Tullie Circle, NE, Atlanta, GA 30329-2305. E
4、-mail:ordersashrae.org. Fax: 404-321-5478. Telephone: 404-636-8400 (worldwide) or toll free 1-800-527-4723 (for orders in US andCanada). For reprint permission, go to www.ashrae.org/permissions. 1998 ISO, 2012 AHRI, ASHRAE ISSN 1041-2336SPECIAL NOTEThis American National Standard (ANS) is a national
5、 voluntary consensus standard developed under the auspices of ASHRAE.Consensus is defined by the American National Standards Institute (ANSI), of which ASHRAE is a member and which has approved thisstandard as an ANS, as “substantial agreement reached by directly and materially affected interest cat
6、egories. This signifies the concurrenceof more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that aneffort be made toward their resolution.” Compliance with this standard is voluntary until and unless a legal jurisdiction m
7、akes compliancemandatory through legislation.ASHRAE obtains consensus through participation of its national and international members, associated societies, and public review.ASHRAE Standards are prepared by a Project Committee appointed specifically for the purpose of writing the Standard. The Proj
8、ectCommittee Chair and Vice-Chair must be members of ASHRAE; while other committee members may or may not be ASHRAE members, allmust be technically qualified in the subject area of the Standard. Every effort is made to balance the concerned interests on all ProjectCommittees.The Manager of Standards
9、 of ASHRAE should be contacted for:a. interpretation of the contents of this Standard,b. participation in the next review of the Standard,c. offering constructive criticism for improving the Standard, ord. permission to reprint portions of the Standard.ASHRAE DISCLAIMERASHRAE uses its best efforts t
10、o promulgate Standards and Guidelines for the benefit of the public in light of available information andaccepted industry practices. However, ASHRAE does not guarantee, certify, or assure the safety or performance of any products, components,or systems tested, installed, or operated in accordance w
11、ith ASHRAEs Standards or Guidelines or that any tests conducted under itsStandards or Guidelines will be nonhazardous or free from risk.ASHRAE INDUSTRIAL ADVERTISING POLICY ON STANDARDSASHRAE Standards and Guidelines are established to assist industry and the public by offering a uniform method of t
12、esting for ratingpurposes,bysuggestingsafepracticesindesigningandinstallingequipment,byprovidingproperdefinitionsofthisequipment,andbyprovidingother information that may serve to guide the industry.The creation of ASHRAE Standards and Guidelines is determined by the need for them,and conformance to
13、them is completely voluntary.In referring to this Standard or Guideline and in marking of equipment and in advertising, no claim shall be made, either stated or implied,that the product has been approved by ASHRAE.AHRI IMPORTANT SAFETY DISCLAIMERAHRI does not set safety standards and does not certif
14、y or guarantee the safety of any products, components or systemsdesigned, rested, rated, installed or operated in accordance with this standard/guideline. It is strongly recommended that productsbe designed, constructed, assembled, installed and operated in accordance with nationally recognized safe
15、ty standards and coderequirements 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. AHRIdoes not certify or guarantee that any tests conducted under its standards/guidelin
16、es will be non-hazardous or free from risk. ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAEs prior written permission.CONTENTSANSI/AHRI/ASHRAE ISO Standard 13256-2:1998 (RA 2012),Wa
17、ter-source heat pumpsTesting and rating for performancePart 2: Water-to-water and brine-to-water heat pumpsThis standard is an identical national adoption of the ISO standard.SECTION PAGEForeword. 2Introduction . 21 Scope . 22 Normative Reference 23 Definitions. 24 Rating and Test Conditions. 35 Per
18、formance Requirements 46 Test Methods 67 Marking Provisions . 88 Publication of Ratings. 9Normative Annex ATest Procedures .9Normative Annex BLiquid Enthalpy Test Method9Informative Annex CInstrumentation and Measurements.10Informative Annex DBibliography11NOTEApproved addenda, errata, or interpreta
19、tions for this standard can be downloaded free of charge from the ASHRAEWeb site at www.ashrae.org/technology. 1998 ISO 2012 AHRI 2012 ASHRAEInternational Organization for Standardization Air-Conditioning, Heating, and Refrigeration Institute1, rue de Varemb, Case postale 56 4100 N. Fairfax Drive, S
20、uite 200 1791 Tullie Circle NECH-1211 Geneva 20, Switzerland Arlington, VA 22203 Atlanta, GA 30329www.iso.org www.ari.org www.ashrae.orgAll rights reserved. All rights reserved. All rights reserved.ASHRAE is a registered trademark of the American Society of Heating, Refrigerating and Air-Conditionin
21、g Engineers, Inc.ANSI is a registered trademark of the American National Standards Institute. ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAEs prior written permission.2 ANSI/AHRI/A
22、SHRAE ISO Standard 13256-2:1998 (RA 2012)(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 be
23、ensubject to public review or a consensus process.Unresolved objectors on informative material are notoffered the right to appeal at ASHRAE or ANSI.)FOREWORDISO (the International Organization for Standardiza-tion) is a worldwide federation of national standards bodies(ISO member bodies). The work o
24、f preparing InternationalStandards is normally carried out through ISO technicalcommittees. Each member body interested in a subject forwhich a technical committee has been established has theright to be represented on that committee. Internationalorganizations, governmental and non-governmental, in
25、 liai-son with ISO, also take part in the work. ISO collaboratesclosely with the International Electrotechnical Commission(IEC) on all matters of electrotechnical standardization.Draft International Standards adopted by the technicalcommittees are circulated to the member bodies for voting.Publicati
26、on as an International Standard requires approvalby at least 75% of the member bodies casting a vote.This part of ISO 13256 was developed by ISO TechnicalCommittee TC 86, Refrigeration, Subcommittee SC 6, Test-ing and rating of air-conditioners and heat pumps.ISO 13256 consists of the following part
27、s, under thegeneral title Water-source heat pumpsTesting and ratingfor performance:Part 1: Water-to-air and brine-to-air heat pumpsPart 2: Water-to-water and brine-to-water heat pumpsAnnexes A and B form an integral part of this part ofISO 13256. Annexes C and D are for information only.INTRODUCTION
28、This part of ISO 13256 covers heating and coolingsystems which are generally referred to as “water-source heatpumps.” These systems generally include an indoor coil withair-moving means, a compressor, and a refrigerant-to-water orrefrigerant-to-brine heat exchanger. A system may provideboth heating
29、and cooling, cooling-only, or heating-only func-tions.1. SCOPE1.1 This part of ISO 13256 establishes performance testingand rating criteria for factory-made residential, commercialand industrial, electrically driven, mechanical-compressiontype, water-to-water and brine-to-water heat pumps. Therequir
30、ements for testing and rating contained in this part ofISO 13256 are based on the use of matched assemblies.1.2 Equipment designed for rating at one application underthis part of ISO 13256 may not be suitable for rating at allapplications covered in this part of ISO 13256.1.3 This part of ISO 13256
31、does not apply to the testing andrating of individual assemblies for separate use or to unitshaving two or more indoor sections connected to a single out-door section. It does not apply to heat pumps covered in ISO5151, ISO 13253, or ISO 13256-1.Note: For the purpose of the remaining clauses, the te
32、rms“equipment” or “heat pump” may be used to mean “water-to-water heat pumps” or brine-to-water heat pumps,” and theterm “liquid” refers to either “water” or “brine.”2. NORMATIVE REFERENCEThe following standard contains provisions which,through reference in this text, constitute provisions of this p
33、artof ISO 13256.At the time of publication, the edition indicatedwas valid. All standards are subject to revision, and parties toagreements based on this part of ISO 13256 are encouraged toinvestigate the possibility of applying the most recent editionof the standard indicated below. Members of IEC
34、and ISOmaintain registers of currently valid International Standards.ISO 817:2005, RefrigerantsDesignation system.3. DEFINITIONSFor the purposes of this part of ISO 13256, the followingdefinitions apply.3.1 water-to-water and brine-to-water heat pumpheat pump which consists of one or more factory-ma
35、deassemblieswhichnormallyincludeanindoor-siderefrigerant-to-water heat exchanger, compressor(s), and an outdoor-siderefrigerant-to-water or refrigerant-to-brine heat exchanger(s),including means to indirectly provide both cooling and heat-ing, cooling-only, or heating-only functionsNotes:1. When suc
36、h equipment is provided in more than oneassembly, the separated assemblies should bedesigned to be used together.2. Such equipment may also provide functions for sani-tary water heating.3.1.1 water-loop-heat pump applicationWater-to-water heat pump using liquid circulating in acommon piping loop fun
37、ctioning as a heat source/heat sinkNote: The temperature of the liquid loop is usually mechani-cally controlled within a temperature range of 15Cto40C.3.1.2 ground-water heat pump applicationWater-to-water heat pump using water pumped from awell, lake or stream functioning as a heat source/heat sink
38、Note: The temperature of the water is related to the climaticconditions and may vary from 5Cto25C for deep wells.3.1.3 ground-loop heat pump applicationbrine-to-water heat pump using a brine solution circulat-ing through a subsurface piping loop functioning as a heatsource/heat sink ASHRAE (www.ashr
39、ae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAEs prior written permission.ANSI/AHRI/ASHRAE ISO Standard 13256-2:1998 (RA 2012) 3Notes:1. The heat exchange loop may be placed in horizontaltrenches o
40、r vertical bores, or be submerged in a bodyof surface water.2. The temperature of the brine is related to the climaticconditions and may vary from 5C to 40C.3.2 cooling capacityamount of heat that the equipment can remove from thewater used to condition the indoor space in a defined intervalof time,
41、 in watts, as determined by the specified test methods3.3 net cooling capacitycooling capacity with indoor-side pump power adjust-ment (See 4.1.2)3.4 heating capacityamount of heat that the equipment can add to the waterusedtoconditiontheindoorspaceinadefinedintervaloftime,in watts, as determined by
42、 the specified test methods3.5 net heating capacityheating capacity with indoor-side pump power adjust-ment (See 4.1.2)3.6 rated voltagevoltageshownonthenameplateoftheequipment,involts3.7 rated frequencyfrequency shown on the nameplate of the equipment, inhertz3.8 energy efficiency ratio (EER)ratio
43、of the net cooling capacity to the effective powerinput at any given set of rating conditions, in watts per watt3.9 coefficient of performance (COP)ratio of the net heating capacity to the effective powerinput of the equipment at any given set of rating conditions, inwatts per watt3.10 effective pow
44、er inputaverage electrical power input to the equipment within adefined interval of time, in watts; i.e., the sum of: the power input for operation of the compressor exclud-ing additional electrical heating devices, the power input of all control and safety devices of theequipment, and the proportio
45、nal power input of the conveying devicesfor the transport of the heat transfer media through theheat pump only (e.g., indoor-side and outdoor-sidepumps, whether internal or external, whether providedwith the equipment or not)(See 4.1.2 and 4.1.3)4. RATING AND TEST CONDITIONS4.1 Rating conditions for
46、 the determination of capacity4.1.1 Standard ratingsStandardratingsshallbeestablishedatthestandardratingconditionsspecifiedin4.2,usingthetestproceduresdescribedin clause 6. Standard ratings relating to cooling and heatingcapacitiesshallbenetvalues,includingtheeffectsofthecircu-lating-pump heat, but
47、not including supplementary heat. Stan-dard efficiency ratings shall be based on the effective powerinput as defined in 3.10.4.1.2 Power input to indoor-side liquid pumps4.1.2.1 If no indoor-side liquid pump is provided withthe heat pump, a pump power adjustment is to be included inthe effective pow
48、er consumed by the heat pump using the fol-lowing formula:wherepaiis the pump power adjustment, indoor, in watts; = 0.3 103by convention;p is the measured indoor-side internal staticpressure difference, in pascals;q is the nominal indoor-side liquid flow rate, inlitres per second.This value shall be
49、 added to the heating capacity andsubtracted from the cooling capacity.4.1.2.2 If an indoor-side liquid pump is an integral partof the heat pump, only the portion of the pump power requiredto overcome the internal resistance shall be included in theeffective power input to the heat pump. The fraction which isto be excluded from the total power consumed by the pumpshall be calculated using the following formula:wherepaiis the pump power adjustment, indoor, in watts; = 0.3 103by convention;p is the measured indoor-side external staticpressur
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