EN 12977-4-2018 Thermal solar systems and components - Custom built systems - Part 4 Performance test methods for solar combistores.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Thermal solar systems and components - Custom built systemsPart 4: Performance test methods for solar combistoresBS EN 129774:2018National forewordThis British Standard is the UK implementation of EN 129774:2018. It sup

2、ersedes BS EN 129774:2012, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee RHE/25, Solar Heating.A list of organizations represented on this committee can be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 include all the nece

3、ssary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 94196 2ICS 97.100.99; 27.160Compliance with a British Standard cannot confer immunity from legal obligations. This British S

4、tandard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 129774:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 12977-4April 2018ICS 27.160; 91.140.10; 91.140.

5、65 Supersedes EN 129774:2012EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN 129774:2018: EAll rights of exploitation in any form and by any means reserved worldwide

6、 for CEN national MembersThermal solar systems and components Custom built systems Part 4: Performance test methods for solar combistoresInstallations solaires thermiques et leurs composants Installations assembles faon Partie 4 : Mthodes dessai des performances pour chauffeeau solaires et installat

7、ions solaires combinesThermische Solaranlagen und ihre Bauteile Kundenspezifisch gefertigte Anlagen - Teil 4: Leistungsprfung von Warmwasserspeichern fr Solaranlagen zur Trinkwassererwrmung und Raumheizung (Kombispeicher)This European Standard was approved by CEN on 29 October 2017.CEN members are b

8、ound 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. Uptodate lists and bibliographical references concerning such national standards may be obtained on application to the C

9、ENCENELEC 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 CEN-CENELEC Management Centre ha

10、s 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, Italy, Latvia, Lithuania, Lux

11、embourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN 12977-4:2018 (E)European foreword 3Introduction . 41 Scope . 52 Normative references 53 Terms and definitions . 54 Symbols and abbreviat

12、ions . 55 Store classification . 56 Laboratory store testing . 66.1 Requirements on the testing stand . 66.1.1 General 66.1.2 Measuring data and measuring procedure . 66.2 Installation of the store 66.2.1 Mounting . 66.2.2 Connection 66.3 Test and evaluation procedures . 76.3.1 General 76.3.2 Test s

13、equences . 86.3.3 Data processing of the test sequences .107 Test report 127.1 General 127.2 Description of the store 127.3 Test results. 137.4 Parameters for the simulation 14Annex A (normative) Store model benchmark tests .15Annex B (normative) Verification of store test results .16Annex C (normat

14、ive) Benchmarks for the parameter identification 17Annex D (informative) Requirements for the numerical store model .18Annex E (informative) Determination of hot water comfort 19Annex F (informative) Implementation for Ecodesign and Energy Labelling 20Annex ZA (informative) Relationship between this

15、 European Standard and the energy labelling requirements of Commission Delegated Regulation (EC) No 811/2013 aimed to be covered .21Bibliography .222Contents PageBS EN 129774:2018EN 12977-4:2018 (E)European forewordThis document (EN 129774:2018) has been prepared by Technical Committee CEN/TC 312 “T

16、hermal 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 October 2018, and conflicting national standards shall be withdrawn a

17、t the latest by October 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN 129774:2012.This document has been prepared u

18、nder the Mandate M/534 “Standardisation request to the European standardisation organisations pursuant to Article 10(1) of Regulation (EU) No 1025/2012 of the European Parliament and of the Council in support of implementation of Commission Regulation (EU) No 814/2013 of 2 August 2013 implementing D

19、irective 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for water heaters and hot water storage tanks and Commission Delegated Regulation (EU) No 812/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Cou

20、ncil with regard to the energy labelling of water heaters, hot water storage tanks and packages of water heater and solar device” which was given to CEN by the European Commission and the European Free Trade Association.For relationship with EU Directive(s), see informative Annex ZA, ZB and ZC, whic

21、h are integral parts of this document.EN 12977 is currently composed with the following parts: Thermal solar systems and components Custom built systems Part 1: General requirements for solar water heaters and combisystems; Thermal solar systems and components Custom built systems Part 2: Test metho

22、ds for solar water heaters and combisystems; Thermal solar systems and components Custom built systems Part 3: Performance test methods for solar water heater stores; Thermal solar systems and components Custom built systems Part 4: Performance test methods for solar combistores; Thermal solar syste

23、ms and components Custom built systems Part 5: Performance test methods for control equipment.According to the CENCENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus,

24、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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the Un

25、ited Kingdom.3BS EN 129774:2018EN 12977-4:2018 (E)IntroductionThe test methods for stores of solar heating systems as described in this document are required for the determination of the thermal performance of small custom built systems for combined domestic hot water preparation and space heating,

26、so-called solar combisystems, as specified in EN 12977-1:2018.These test methods deliver parameters, which are needed for the simulation of the thermal behaviour of a store being part of a small custom built system.NOTE 1 With the test methods for stores given in EN 12897 only a few parameters are d

27、etermined in order to characterize the thermal behaviour of a store. These few parameters are not sufficient for the determination of the thermal performance of small custom built systems as described in EN 129772:2018.NOTE 2 The already existing test methods for stores of conventional heating syste

28、ms are not sufficient with regard to solar heating systems. This is due to the fact that the performance of solar heating systems depends much more on the thermal behaviour of the store (e.g. stratification, heat losses), as conventional systems do. Hence, this separate document for the performance

29、characterization of stores for solar heating systems is needed.NOTE 3 For additional information about the test methods for the performance characterization of stores see EN 129773:2018 and 1 in Bibliography.4BS EN 129774:2018EN 12977-4:2018 (E)1 ScopeThis European Standard specifies test methods fo

30、r the performance characterization of stores which are intended for use in small custom built systems as specified in EN 12977-1:2018.Stores tested according to this document are commonly used in solar combisystems. However, the thermal performance of all other thermal stores with water as a storage

31、 medium (e.g. for heat pump systems) can be also assessed according to the test methods specified in this document.This document applies to combistores with a nominal volume up to 3 000 l and without integrated burner.NOTE This document is extensively based on references to EN 129773:2018.2 Normativ

32、e referencesThe following documents, in whole 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) appl

33、ies.EN 12828, Heating systems in buildings Design for water-based heating systemsEN 129773:2018, Thermal solar systems and components Custom built systems Part 3: Performance test methods for solar water heater storesEN ISO 9488:1999, Solar energy Vocabulary (ISO 9488:1999)3 Terms and definitionsFor

34、 the purposes of this document, the terms and definitions given in EN 12977-3:2018 and EN ISO 9488:1999 apply.4 Symbols and abbreviationsFor the purposes of this document, the symbols and abbreviations given in EN 129773:2018 apply.5 Store classificationSolar combistores are classified by distinctio

35、n between different charge and discharge modes. Five groups are defined as shown in Table 1.Table 1 Classification of combistoresGroup Charge mode Discharge mode1 direct direct2 indirect direct3 direct indirect4 indirect indirect5 stores that cannot be assigned to groups 1 to 4NOTE All stores can ha

36、ve one or more additional electrical auxiliary heating elements.Stores that can be charged or discharged directly and indirectly (e.g. a store of a space heating system with an internal heat exchanger for the preparation of domestic hot water) can belong to more than one group. In this case, the app

37、ropriate test procedures or the assignment to one of the groups respectively, should be chosen depending on its mode of operation.5BS EN 129774:2018EN 12977-4:2018 (E)6 Laboratory store testing6.1 Requirements on the testing stand6.1.1 GeneralThe hot water store shall be tested separately from the w

38、hole solar system on a storetesting stand.The testing stand configuration shall be determined by the classification of the combistores as described in Clause 5.An example of a representative hydraulic testing stand configuration is shown in EN 12977-3:2018, Figure 1 and Figure 2. An appropriate test

39、 facility consists of two charge loops as shown in EN 129773:2018, Figure 1 and two discharge loops as shown in EN 129773:2018, Figure 2.6.1.2 Measuring data and measuring procedureThe requirements specified in EN 12977-3:2018, 6.1.2 shall be fulfilled.6.2 Installation of the store6.2.1 MountingThe

40、store shall be mounted on the testing stand according to the manufacturers instructions.The temperature sensors used for measuring the inlet and outlet temperatures of the fluid used for charging and discharging the storage device, shall be placed as near as possible at least 200 mm to the inlet and

41、 outlet connections of the storage device. The installation of the temperature sensors inside the pipes shall be done according to approved methods of measuring temperatures.If there is/are more than one pair of charging and/or discharging inlet or outlet connections, then only one may be connected

42、to the testing stand (at the same time) while the other(s) shall be closed.The pipes between the store and the temperature sensors shall be insulated according to EN 12828.6.2.2 ConnectionThe way of connecting the storage device to the testing stand depends on the purpose of the thermal tests which

43、shall be performed. Detailed instructions are given in the clauses where the thermal tests are described.Connections of the store which do not lead to the charge or discharge circuit of the testing stand shall be closed, and not connected heat exchangers shall be filled up with water. All closed con

44、nections shall be insulated in the same way as the store.Since fluid in closed heat exchangers expands with increasing temperature, a pressure relief valve shall be mounted.The performance of a solar heating system depends on the individual installation and actual boundary conditions. With regard to

45、 the heat losses of the store besides deficits in the thermal insulation, badly designed connections can increase the heat loss capacity rate of the store due to natural convection that occurs internally in the pipe. In order to avoid this effect, the connections of the pipes should be designed in s

46、uch a way that no natural convection inside the pipe occurs. This can be achieved if the pipe is directly going downwards after leaving the store or by using a heat trap siphon.6 BS EN 129774:2018EN 12977-4:2018 (E)6.3 Test and evaluation procedures6.3.1 GeneralThe aim of store testing as specified

47、in this document is to determine parameters required for the detailed description of the thermal behaviour of a combistore. Therefore, a mathematical computer model for the store is necessary. The basic requirements on suitable models are specified in Annex A and Annex B.The following parameters sha

48、ll be known for the simulation of a store being part of a solar heating system.a) Stored water:1) height;2) effective volume respectively effective thermal capacity;3) heights of the inlet and outlet connections;4) heat loss capacity rate of the entire store;5) if the insulation varies for different

49、 heights of the store, the distribution of the heat loss capacity rate should be determined for the different parts of the store;6) a parameter describing the degradation of thermal stratification during stand-by;NOTE 1 One possible way to describe this effect in a store model is the use of a vertical thermal conduction. In this case, the corresponding parameter is an effective vertical thermal conductivity.7) a parameter describing the characteristic of thermal stratification during direct discharge;