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1、DRAFT FOR DEVELOPMENT DD CEN/TS 14825:2003 Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling Testing and rating at part load conditions ICS 01.040.23; 01.040.27; 23.120; 27.080 ? Licensed Copy: London South Bank University, L
2、ondon South Bank University, Sat Dec 09 04:12:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DD CEN/TS 14825:2003 This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 20 January 2004 BSI 20 January 2004 ISBN 0 580 43295 5 National foreword Thi
3、s Draft for Development is the official English language version of CEN/TS 14825:2003. This publication is not to be regarded as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature due to the small amount of experience in this typ
4、e of testing. It should be applied on this provisional basis, so that information and experience of its practical application may be obtained. Comments arising from the use of this Draft for Development are requested so that UK experience can be reported to the European organization responsible for
5、its conversion to a European standard. A review of this publication will be initiated 2 years after its publication by the European organization so that a decision can be taken on its status at the end of its 3-year life. Notification of the start of the review period will be made in an announcement
6、 in the appropriate issue of Update Standards. According to the replies received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion into a European standard, to extend the life of the Technical Specification or to withdraw it. Comments should
7、 be sent in writing to the Secretary of BSI Technical Committee RHE/17, Testing of air conditioning units, at British Standards House, 389 Chiswick High Road, London W4 4AL, giving the document reference and clause number and proposing, where possible, an appropriate revision of the text. A list of
8、organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Co
9、rrespondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. Summary of pages This document comprises a front cover, an inside front cover, the CEN/TS title page, pages 2 to 10, an inside back cover and a back cover. The BSI copyright notice
10、displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 04:12:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI TECHNICAL SPECIFICATION SPCIFICA
11、TION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 14825 December 2003 ICS 01.040.23, 01.040.27, 23.120, 27.080 English version Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Testing and rating at part load conditions Climat
12、iseurs, groupes refroidisseurs de liquide et pompes chaleur avec compresseur entrain par moteur lectrique pour le chauffage et la rfrigration - Essais et dtermination des caractristiques charge partielle Luftkonditionierer, Flssigkeitskhlstze und Wrmepumpen mit elektrisch angetriebenen Verdichtern z
13、ur Raumbeheizung und Khlung Prfung und Leistungsbemessung unter Teillastbedingungen This Technical Specification (CEN/TS) was approved by CEN on 24 September 2003 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two years the members of CE
14、N will be requested to submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available. It is permissible to keep conflict
15、ing national standards in force (in parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Irel
16、and, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exp
17、loitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 14825:2003 E Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 04:12:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN/TS 14825:2003 (E) 2 Contents Introduction.4 1
18、Scope 4 2Normative references 4 3Terms and definitions4 4Reduced capacity test.6 4.1Test apparatus6 4.2Test conditions 6 4.3Test procedures.7 4.4Test tolerances.8 4.5Output measurement.8 5Calculation8 6Uncertainties of measurement .9 7Test report 9 8Technical data sheet9 Annex A (informative) Test c
19、onditions for reduced capacities that differ form 50%.10 A.1.For fixed capacity units.10 A.2.For step controlled variable capacity units.10 A.3.For continuous controlled variable capacity units.10 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 04:12:07 GMT+00:0
20、0 2006, Uncontrolled Copy, (c) BSI CEN/TS 14825:2003 (E) 3 Foreword This document (CEN/TS 14825:2003) has been prepared by Technical Committee CEN/TC 113 “Heat pumps and conditioning units”, the secretariat of which is held by AENOR. This Technical Specification was first intended to be published as
21、 EN standard, but due to the little experience in this type of testing, the Technical Committee decided to issue it as a TS. This Technical Specification is published to give the general conditions and requirements for testing. When further experience will be reached in test methods, the change to E
22、N will be considered. Annex A is informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Specification: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, I
23、celand, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 04:12:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN/TS 14825:2003 (E) 4 Int
24、roduction Heat pumps, air conditioners and liquid chilling packages are, at present, selected and compared at a rated condition. This condition does not represent the usual operating conditions of the equipment over a season. This operating condition can be better assessed by comparing equipment at
25、a representative 50% reduced capacity. Fixed capacity air conditioners, liquid chilling packages and heat pumps deal with varying loads by varying the operation time. The efficiency of the system is dependent on the effectiveness of the controlling thermostats. Variable capacity air conditioners, li
26、quid chilling packages and heat pumps, by continuous or step control of the compressor, can more closely match the varying load improving system efficiency. This standard gives the rating conditions and methods for testing air conditioners, heat pumps and liquid chilling packages operating to overco
27、me part load. The rating conditions and test methods of units operating to overcome full load are given in EN 14511-2 and EN 14511-3. 1 Scope This Technical Specification covers testing of air conditioners, heat pumps and liquid chilling packages for part load conditions. It specifies the terms, the
28、 definitions, the methods for testing and reporting, and the calculation method for the cyclic and compressor reduced capacity. The temperature and system reduced capacities are excluded. This European Standard applies to factory made units defined in EN 14511-1. 2 Normative references This European
29、 Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications app
30、ly to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 14511-1; Air conditioners, liquid chilling packages and heat pumps, with electrically driven compressors for
31、 space heating and cooling Part 1: Terms and definitions. EN 14511-2; Air conditioners, liquid chilling packages and heat pumps, with electrically driven compressors for space heating and cooling Part 2: Test conditions. EN 14511-3; Air conditioners, liquid chilling packages and heat pumps, with ele
32、ctrically driven compressors for space heating and cooling Part 3: Test methods. EN 14511-4; Air conditioners, liquid chilling packages and heat pumps, with electrically driven compressors, for space heating and cooling Part 4: Requirements. 3 Terms and definitions For the purposes of this European
33、Standard, the definitions given in EN 14511-1 apply together with the following. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 04:12:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN/TS 14825:2003 (E) 5 3.1 full load the thermal load of the building or process
34、 at design conditions. 3.2 part load the thermal load of the building or process which is lower than the full load. 3.3 compensation load the heating or cooling load imposed by the test apparatus on the test object. 3.4 rated capacity the capacity measured at rating conditions as defined in EN 14511
35、-2. 3.5 reduced capacity the capacity which is lower than the rated capacity. 3.6 reduced capacity types 3.6.1 cyclic reduced capacity the capacity obtained by switching the compressor on and off. 3.6.2 system reduced capacity the capacity obtained by changing the size of the evaporator or the conde
36、nser (e.g. by switching 1 of 2 indoors off; or letting the refrigerant flow through only part of the heat exchanger). Note This type of reduced capacity is not within the scope of this Technical Specification. 3.6.3 compressor reduced capacity the capacity obtained when changing the refrigerant volu
37、me flow rate by any compressor unloading systems. This applies to step controlled and continuously controlled variable capacity units. 3.6.4 temperature reduced capacity the capacity obtained by changing the outside temperature conditions. Note: This type of reduced capacity is not within the scope
38、of this Technical Specification. 3.7 EER50% the EER of a unit when the unit delivers 50% of its rated capacity. 3.8 COP50% the COP of a unit when the unit delivers 50% of its rated capacity. 3.9 fixed capacity unit air conditioner, heat pump or liquid chilling package, which does not have the possib
39、ility to change automatically (in minimum two steps or continuously) the amount of refrigerant flowing through the system. Note: Where no refrigerant is flowing through the indoor side (or one of the indoor units) it is not considered a capacity step. Licensed Copy: London South Bank University, Lon
40、don South Bank University, Sat Dec 09 04:12:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN/TS 14825:2003 (E) 6 3.10 variable capacity 3.10.1 variable capacity Step controlled where the capacity is varied or changed in a series of steps or increments by off loading the compressor(s), by a number o
41、f compressors operating in sequence, by a combination of both, or by other means. Note: If the combination of compressors include one which is inverter controlled, this combination is considered as continuously controlled. 3.10.2 variable capacity Continuously controlled where the capacity is varied
42、 or changed continuously, for example by varying the speed of the compressor(s), normally by inverter control. 4 Reduced capacity test 4.1 Test apparatus For the purpose of this standard, the test apparatus given in EN 14511-3 apply. 4.2 Test conditions The tests shall be carried out under the same
43、environmental conditions and with the same electrical power supply as for the rated capacity test, as defined in EN 14511-2. The inlet temperature conditions used in the rated capacity test are maintained during the reduced capacity test at both the condenser and evaporator. The flow rate conditions
44、 used in the rated capacity test are maintained during the reduced capacity test at both the condenser and evaporator except if they are automatically changed by the control system of the unit. In case of appliances with variable flow rate, the pressure drop coefficient between the outlet and the in
45、let of the unit shall be the same as during the rated capacity test. For variable air flow units, this can be achieved by setting a damper after the section used for the measurement of the external static pressure, and by adjusting it in order to get a 0 Pa static pressure after the damper, with the
46、 air flow and external static pressure remained as during the rated capacity test (see Figure 1). This setting is made when the refrigerating system does not operate. Then the reduced capacity test is performed without changing the setting of the damper, and maintaining the 0 Pa static pressure afte
47、r the damper. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 04:12:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN/TS 14825:2003 (E) 7 Key 1 Object under test 2 Air flow 3 External static pressure 4 Duct 5 Damper 6 Air flow measuring apparatus 7 Fan Figure 1
48、Example of test apparatus for variable air flow For variable water flow units, a device producing a variable pressure drop may be used to produce a similar effect. 4.3 Test procedures 4.3.1Unit with fixed capacity For units with fixed capacity a cyclic reduced capacity test is performed. The unit sh
49、all operate with equal compressor ON and OFF periods of 30 minutes each. If the reduced capacity is not in the range of 40% to 60% of the rated capacity and the efficiency resulting from the reduced capacity test differs more than 5% from the efficiency resulting from the rated capacity test a new test shall be performed. In this new test the OFF period shall be changed proportionally to the result, within the limit of the forced OFF period of the control device of the unit. Altern