1、BS EN ISO 22975-2:2016Solar energy Collectorcomponents and materialsPart 2: Heat-pipes for solar thermalapplication Durability and performance(ISO 22975-2:2016)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 22975-2:2016 BRITISH STANDARDNational forewordThi
2、s British Standard is the UK implementation of EN ISO 22975-2:2016.The UK participation in its preparation was entrusted to Technical Committee RHE/25, Solar Heating.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to
3、 include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 80601 8 ICS 27.160 Compliance with a British Standard cannot confer immunity from legal obligations.Thi
4、s British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 22975-2 October 2016 ICS 27.160 English Version S
5、olar 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 2: Caloduc pour application thermique solaire - Durabilit et performance (ISO 22975-2:201
6、6) Solarenergie - Kollektorbauteile und -materialien - Teil 2: Wrmerohre fr solarthermische Anwendungen - Bestndigkeit und Leistungsfhigkeit (ISO 22975-2:2016) This European Standard was approved by CEN on 12 September 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations w
7、hich 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 obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This
8、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 CEN-CENELEC Management Centre has the same status as the official versions. CEN member
9、s 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, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal
10、, 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: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form a
11、nd by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 22975-2:2016 EBS EN ISO 22975-2:2016EN ISO 22975-2:2016 (E) 3 European foreword This document (EN ISO 22975-2:2016) has been prepared by Technical Committee ISO/TC 180 “Solar energy“ in collaboration with Technical Committe
12、e CEN/TC 312 “Thermal solar systems and components” the secretariat of which is held by 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 b
13、e withdrawn at the latest by April 2017. Attention is drawn to the possibility that some 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 Regulat
14、ions, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Ital
15、y, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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. ISO 2016So
16、lar energy Collector components and materials Part 2: Heat-pipes for solar thermal application Durability and performancenergie solaire Composants et matriaux du collecteur Partie 2: Caloduc pour application thermique solaire Durabilit et performanceINTERNATIONAL STANDARDISO22975-2First edition2016-
17、10-01Reference numberISO 22975-2:2016(E)ISO 22975-2:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, e
18、lectronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Ver
19、nier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS EN ISO 22975-2:2016ISO 22975-2:2016(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Test overview . 25 Durability . 35.1 High temperature resistance test 35.1.1
20、Objective 35.1.2 Test conditions. 35.1.3 Apparatus . 35.1.4 Procedure . 35.1.5 Results . 35.2 Freeze resistance test 45.2.1 Objective 45.2.2 Test conditions. 45.2.3 Apparatus . 45.2.4 Procedure . 45.2.5 Results . 56 Performance 56.1 Starting temperature of heat-pipes . 56.1.1 Principle 56.1.2 Test c
21、onditions. 56.1.3 Apparatus . 56.1.4 Procedure . 56.1.5 Results . 66.2 Temperature uniformity of heat-pipes . 66.2.1 Principle 66.2.2 Test conditions. 66.2.3 Apparatus . 66.2.4 Procedure . 66.2.5 Results . 76.3 Heat transfer power of heat-pipes . 76.3.1 Principle 76.3.2 Test conditions. 76.3.3 Appar
22、atus . 86.3.4 Procedure 106.3.5 Results 11Annex A (informative) Typical configuration of a heat-pipe for solar thermal application 12Annex B (normative) Test reports on a heat-pipe for solar thermal application .13Bibliography .22 ISO 2016 All rights reserved iiiContents PageBS EN ISO 22975-2:2016IS
23、O 22975-2:2016(E)ForewordISO (the International Organization for 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 subje
24、ct for which a technical committee has been established has the 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
25、) on all matters of electrotechnical standardization.The procedures 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 no
26、ted. This document was drafted in accordance with the editorial 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
27、 any or all such patent rights. Details of any patent rights identified 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
28、 users and does not constitute an endorsement.For an explanation 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 follow
29、ing URL: www.iso.org/iso/foreword.html.The committee responsible 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
30、solar thermal application Durability and performance Part 3: Absorber surface durabilityThe following parts are under preparation: Part 5: Insulation material durability and performanceiv ISO 2016 All rights reservedBS EN ISO 22975-2:2016 ISO 22975-2:2016(E)IntroductionThis part of ISO 22975 specifi
31、es test methods for durability and performance of heat-pipes for solar thermal application.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,
32、 procedure and test results are specified.For all the tests specified in this part of ISO 22975, a complete heat-pipe is required. ISO 2016 All rights reserved vBS EN ISO 22975-2:2016BS EN ISO 22975-2:2016 Solar energy Collector components and materials Part 2: Heat-pipes for solar thermal applicati
33、on Durability and performance1 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 use with evacuated tubes, including glass-metal sealed evacuated tubes a
34、nd 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 part of ISO 22975 also provides test methods for measuring performance of
35、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 whole or in part, are normatively referenced in this document and are indis
36、pensable 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/IEC 17025, General requirements for the competence of testing and calibrat
37、ion 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 transfer3.2gravity heat-pipeheat-pipe (3.1) without a capillary wick inside,
38、 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 becomes the vaporized working fluidINTERNATIONAL STANDARD ISO 22975-2:2016(E)
39、ISO 2016 All rights reserved 1BS EN ISO 22975-2:2016 ISO 22975-2:2016(E)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 (3.3) and c
40、ondenser (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 temperature requi
41、red 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 from a heat
42、-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 for heat-pi
43、pes 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 temperature of
44、 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.2 ISO 2016 All righ
45、ts reservedBS EN ISO 22975-2:2016 ISO 22975-2:2016(E)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 condi
46、tions:a) 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
47、 temperature, 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 sh
48、all not be 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
49、the heating 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.5.1.5 ResultsThe product will be qualified if there is no visual evidence of damage to the heat-pipes.Results of the inspection shall be reported toge
