DIN EN ISO 22975-2-2017 Solar energy - Collector components and materials - Part 2 Heat-pipes for solar thermal application - Durability and performance (ISO 22975-2 2016) German v.pdf

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1、March 2017 English price group 15No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 27.160!%bVT“2635149www.din.deDIN E

2、N ISO 22975-2Solar energy Collector components and materials Part 2: Heatpipes for solar thermal application Durability and performance (ISO 229752:2016);English version EN ISO 229752:2016,English translation of DIN EN ISO 22975-2:2017-03Solarenergie Kollektorbauteile und materialien Teil 2: Wrmeroh

3、re fr solarthermische Anwendungen Bestndigkeit und Leistungsfhigkeit (ISO 229752:2016);Englische Fassung EN ISO 229752:2016,Englische bersetzung von DIN EN ISO 22975-2:2017-03nergie solaire Composants et matriaux du collecteur Partie 2: Caloduc pour application thermique solaire Durabilit et perform

4、ance (ISO 229752:2016);Version anglaise EN ISO 229752:2016,Traduction anglaise de DIN EN ISO 22975-2:2017-03www.beuth.deDocument comprises 29 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.03.17 DIN EN ISO 22975-2:2017-03 2 A

5、comma is used as the decimal marker. National foreword This document (EN ISO 22975-2:2016) has been prepared by Technical Committee ISO/TC 180 “Solar energy” in collaboration with Technical Committee CEN/TC 312 “Thermal solar systems and components” (Secretariat: ELOT, Greece). The responsible Germa

6、n body involved in its preparation was DIN-Normenausschuss Heiz- und Raumlufttechnik (DIN Standards Committee Heating and Ventilation Technology), Working Committee NA 041-01-56 AA Solaranlagen (SpA CEN/TC 312 und ISO/TC 180). The DIN Standards corresponding to the International Standards referred t

7、o in this document are as follows: ISO 9488 DIN EN ISO 9488 ISO/IEC 17025 DIN EN ISO/IEC 17025 National Annex NA (informative) Bibliography DIN EN ISO 9488, Solar energy Vocabulary DIN EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories EUROPEAN STANDARD

8、 NORME EUROPENNE EUROPISCHE NORM EN ISO 22975-2 October 2016 ICS 27.160 English Version Solar energy - Collector components and materials - Part 2: Heat-pipes for solar thermal application - Durability and performance (ISO 22975-2:2016) nergie solaire - Composants et matriaux du collecteur - Partie

9、2: Caloduc pour application thermique solaire - Durabilit et performance(ISO 22975-2:2016) Solarenergie - Kollektorbauteile und -materialien -Teil2: Wrmerohre fr solarthermische Anwendungen - Bestndigkeit und Leistungsfhigkeit(ISO 22975-2:2016)This European Standard was approved by CEN on 12 Septemb

10、er 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obta

11、ined on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CE

12、N-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland

13、, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre:

14、 Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 22975-2:2016 EForeword .4Introduction .51 Scope . 62 Normative references 63 Terms and definitions . 64 Test overview . 75 Durability . 85.

15、1 High temperature resistance test 85.1.1 Objective 85.1.2 Test conditions. 85.1.3 Apparatus . 85.1.4 Procedure . 85.1.5 Results . 85.2 Freeze resistance test 95.2.1 Objective 95.2.2 Test conditions. 95.2.3 Apparatus . 95.2.4 Procedure . 95.2.5 Results 106 Performance .106.1 Starting temperature of

16、heat-pipes 106.1.1 Principle .106.1.2 Test conditions106.1.3 Apparatus 106.1.4 Procedure 106.1.5 Results 116.2 Temperature uniformity of heat-pipes 116.2.1 Principle .116.2.2 Test conditions116.2.3 Apparatus 116.2.4 Procedure 116.2.5 Results 126.3 Heat transfer power of heat-pipes 126.3.1 Principle

17、.126.3.2 Test conditions126.3.3 Apparatus 136.3.4 Procedure 156.3.5 Results 16Annex A (informative) Typical configuration of a heat-pipe for solar thermal application 17Annex B (normative) Test reports on a heat-pipe for solar thermal application .18Bibliography .27Contents PageEN ISO 22975-2:2016 (

18、E) DIN EN ISO 22975-2:2017-03 2European foreword .3European foreword This document (EN ISO 22975-2:2016) has been prepared by Technical Committee ISO/TC 180 “Solar energy“ in collaboration with Technical Committee CEN/TC 312 “Thermal solar systems and components” the secretariat of which is held by

19、ELOT. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2017, and conflicting national standards shall be withdrawn at the latest by April 2017. Attention is drawn to the possibility that some

20、 of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to imple

21、ment this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,

22、 Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 22975-2:2016 has been approved by CEN as EN ISO 22975-2:2016 without any modification. EN ISO 22975-2:2016 (E) DIN EN ISO 22975-2:2017-03 3 ForewordISO (the International Organization f

23、or Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has th

24、e right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The proce

25、dures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editoria

26、l rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights i

27、dentified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanati

28、on on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee responsib

29、le for this document is ISO/TC 180, Solar energy.ISO 22975 consists of the following parts, under the general title Solar energy Collector components and materials: Part 1: Evacuated tube Durability and performance Part 2: Heat-pipes for solar thermal application Durability and performance Part 3: A

30、bsorber surface durabilityThe following parts are under preparation: Part 5: Insulation material durability and performanceEN ISO 22975-2:2016 (E) DIN EN ISO 22975-2:2017-03 4 IntroductionThis part of ISO 22975 specifies test methods for durability and performance of heat-pipes for solar thermal app

31、lication.This part of ISO 22975 is applicable to all heat-pipes for use with both evacuated tubes and flat plate collectors.For each durability and performance test, its objective, principle, test condition, apparatus, procedure and test results are specified.For all the tests specified in this part

32、 of ISO 22975, a complete heat-pipe is required.EN ISO 22975-2:2016 (E) DIN EN ISO 22975-2:2017-03 5 1 ScopeThis part of ISO 22975 specifies definitions and test methods for durability and performance of heat-pipes for solar thermal application.This part of ISO 22975 is applicable to heat-pipes for

33、use with evacuated tubes, including glass-metal sealed evacuated tubes and double-glass evacuated tubes, as well as with flat plate collectors.This part of ISO 22975 provides test methods for determining durability of the heat-pipe, including high temperature resistance and freeze resistance.This pa

34、rt of ISO 22975 also provides test methods for measuring performance of the heat-pipe, including starting temperature, temperature uniformity and heat transfer power of the heat-pipe.This part of ISO 22975 is only applicable to gravity heat-pipes.2 Normative referencesThe following documents, in who

35、le or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 9488, Solar energy VocabularyISO/IE

36、C 17025, General requirements for the competence of testing and calibration laboratories3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 9488 and the following apply.3.1heat-pipeheat transfer element, utilizing latent heat of phase-change for heat tran

37、sfer3.2gravity heat-pipeheat-pipe (3.1) without a capillary wick inside, in which the liquefied working fluid (3.6) returns from condenser (3.4) to evaporator (3.3) due to its own weight3.3evaporatorpart of a heat-pipe (3.1), where the liquefied working fluid (3.6) absorbs heat, vaporizes and become

38、s the vaporized working fluidEN ISO 22975-2:2016 (E) DIN EN ISO 22975-2:2017-03 6 3.4condenserpart of a heat-pipe (3.1), where the vaporized working fluid (3.6) releases heat, condenses and becomes the liquefied working fluid3.5adiabatic sectionpart of a heat-pipe (3.1), located between evaporator (

39、3.3) and condenser (3.4), where working fluid (3.6) has minimal heat exchange with the surroundings3.6working fluidmedium used for heat transfer in a heat-pipe (3.1)3.7tilt angle (of heat-pipe)angle between the horizontal plane and a heat-pipe (3.1)3.8starting temperature of heat-pipeminimum tempera

40、ture required for a heat-pipe (3.1) to start operating3.9temperature uniformity of heat-pipetemperature difference between evaporator (3.3) and condenser (3.4) when a heat-pipe (3.1) operates under normal conditions3.10heat transfer power of heat-pipethermal power transferred to the cooling liquid f

41、rom a heat-pipe (3.1) when using the cooling liquid to remove heat3.11stable conditionsconditions in performance tests of a heat-pipe (3.1), in which the temperature variation is less than 1 K over a period depending on the performance test item4 Test overviewDurability tests and performance tests f

42、or heat-pipes are specified in Clause 5 and Clause 6, respectively. The tests shall be performed in the sequence according to Table 1.All these tests shall be performed on the same heat-pipes.Table 1 Test listClause Test5.1 High temperature resistance test5.2 Freeze resistance testa6.1 Starting temp

43、erature of heat-pipes6.2 Temperature uniformity of heat-pipes6.3 Heat transfer power of heat-pipesbaThe freeze resistance test shall be carried out only for heat-pipes claimed to be freeze resistant.bThe heat transfer power test shall be performed after the high temperature resistance test.EN ISO 22

44、975-2:2016 (E) DIN EN ISO 22975-2:2017-03 7 5 Durability5.1 High temperature resistance test5.1.1 ObjectiveThis test is intended to assess the capability of a heat-pipe to withstand high temperature without failure.5.1.2 Test conditionsThe test shall be carried out under the following conditions:a)

45、test environment: indoors;b) ambient temperature: 15 C to 35 C;c) test temperature in heating chamber: 180 C 5 C or 230 C 5 C or 280 C 5 C depending on specific application and manufacturers declaration;d) tilt angle of heat-pipe: 90 1.The test may be conducted at any higher heating chamber temperat

46、ure, if requested.5.1.3 ApparatusThe test apparatus consists of a heating chamber and a thermometric system.Measuring instruments shall meet the following requirements:a) heating chamber temperature controller, with an accuracy of 0,5 K;b) ambient temperature sensor; standard uncertainty shall not b

47、e more than 0,5 K;c) digital clock/data acquisition system; standard uncertainty shall not be more than 10 s/d.5.1.4 ProcedureThe test shall be carried out for a batch of at least 10 sample heat-pipes of the same product.The procedure shall be as follows.a) Place all sample heat-pipes into the heati

48、ng chamber at the specified tilt angle.b) Increase the temperature in the heating chamber slowly (maximum 20 K/min) up to the selected test temperature.c) Maintain the test temperature for 30 h.d) After the heat-pipes have cooled to room temperature, visually inspect for damage, such as leakage, breakage, distortion or deformation.5.1