EN 15316-3-2-2007 en Heating systems in buildings - Method for calculation of system energy requirements and system efficiencies - Part 3-2 Domestic hot water systems distribution《.pdf

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1、BRITISH STANDARDBS EN 15316-3-2:2007Heating systems in buildings Method for calculation of system energy requirements and system efficiencies Part 3-2: Domestic hot water systems, distributionICS 91.140.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49

2、g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 15316-3-2:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 August 2008 BSI 2008ISBN 978 0 580 55694 4National forewordThis Br

3、itish Standard is the UK implementation of EN 15316-3-2:2007.The UK participation in its preparation was entrusted to Technical Committee RHE/24, Central heating installations.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not

4、purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORM

5、EN 15316-3-2October 2007ICS 91.140.10English VersionHeating systems in buildings - Method for calculation of systemenergy requirements and system efficiencies - Part 3-2:Domestic hot water systems, distributionSystmes de chauffage dans les btiments - Mthode decalcul des besoins nergtiques et des ren

6、dements dessystmes - Partie 3-2 : Systmes de production deauchaude sanitaire, distributionHeizungsanlagen in Gebuden - Verfahren zur Berechnungder Energieanforderungen und Nutzungsgrade der Anlagen- Teil 3-2: Trinkwassererwrmung, VerteilungThis European Standard was approved by CEN on 18 August 2007

7、.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on ap

8、plication to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre

9、has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Por

10、tugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means r

11、eservedworldwide for CEN national Members.Ref. No. EN 15316-3-2:2007: EEN 15316-3-2:2007 (E) 2 Contents Page Foreword4 Introduction .6 1 Scope 7 2 Normative references 7 3 Terms and definitions .7 4 Symbols, units and indices 10 5 Domestic hot water system characteristics11 5.1 General11 5.2 Single

12、zone and single system.12 5.3 Single zone and multiple systems .12 5.4 Multiple zones with single system.13 6 Distribution thermal losses 13 6.1 Total distribution thermal losses .13 6.2 Thermal losses from individual distribution pipe section.14 6.2.1 General14 6.2.2 Thermal losses from pipes based

13、 on dwelling area 14 6.2.3 Thermal losses from pipes based on pipe lengths and number of tappings per day15 6.2.4 Thermal losses from pipes based on pipe lengths and distribution efficiencies.15 6.2.5 Thermal losses from pipes based on pipe lengths and tapping profiles 16 6.2.6 Thermal losses from p

14、ipes based on pipe lengths and average temperature16 6.2.7 Heat energy lost due to wasted hot water.16 6.2.8 Time periods.16 6.3 Thermal losses from circulation loop16 6.3.1 General16 6.3.2 Thermal losses from circulation loop based on pipe length and a fixed value of heat loss .16 6.3.3 Thermal los

15、ses from circulation loop based on a physical approach.17 6.3.4 Additional thermal losses from circulation loop during periods of no circulation 17 6.3.5 Total thermal loss from circulation loop .17 6.4 Thermal losses due to accessories .18 6.5 User outlets 18 7 Auxiliary energy.18 7.1 Total auxilia

16、ry energy consumption 18 7.2 Auxiliary energy consumption for ribbon heating .18 7.3 Auxiliary energy consumption for pumps 19 7.3.1 General19 7.3.2 Simplified method19 7.3.3 Detailed calculation method.20 8 Recoverable, recovered and unrecoverable system losses .20 Annex A (informative) Calculation

17、 of thermal losses from pipes based on pipe lengths and the number of tappings per day .22 Annex B (informative) Calculation of thermal losses from pipes based on pipe lengths and distribution efficiencies 24 Annex C (informative) Calculation of thermal losses from pipes based on pipe lengths and ta

18、pping profiles26 Annex D (informative) Calculation of thermal losses from circulation loop.28 BS EN 15316-3-2:2007EN 15316-3-2:2007 (E) 3 D.1 Calculation of thermal losses based on pipe length .28 D.2 Thermal losses based on a detailed calculation method28 D.2.1 General .28 D.2.2 Determination of le

19、ngth of pipe sections28 D.2.3 Determination of heat transfer coefficients31 D.2.4 Tabulated method for calculation of linear thermal transmittance33 D.2.5 Determination of average ambient temperature.34 D.2.6 Determination of average hot water temperature of pipe section34 Annex E (informative) Calc

20、ulation of thermal losses from user outlets .35 Annex F (informative) Calculation of auxiliary energy requirement of a circulation pump 36 F.1 Simplified method for calculation of auxiliary energy requirement of a circulation pump.36 F.2 Detailed method for calculation of auxiliary energy requiremen

21、t of a circulation pump 36 F.2.1 Hydraulic energy requirement .36 F.2.2 Hydraulic power required by the pump.36 F.2.3 Duration of the provision of domestic hot water .37 F.2.4 Pump performance coefficient.38 F.2.5 Intermittent pump operation.39 F.2.6 Expenditure value coefficient 39 F.3 Auxiliary en

22、ergy recoverable factor 40 Bibliography41 BS EN 15316-3-2:2007EN 15316-3-2:2007 (E) 4 Foreword This document (EN 15316-3-2:2007) has been prepared by Technical Committee CEN/TC 228 “Heating systems in buildings”, the secretariat of which is held by DS. This European Standard shall be given the statu

23、s of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2008, and conflicting national standards shall be withdrawn at the latest by April 2008. This document has been prepared under a mandate given to CEN by the European Commission and the Euro

24、pean Free Trade Association (Mandate M/343), and supports essential requirements of EU Directive 2002/91/EC on the energy performance of buildings (EPBD). It forms part of a series of standards aimed at European harmonisation of the methodology for calculation of the energy performance of buildings.

25、 An overview of the whole set of standards is given in prCEN/TR 15615. The subjects covered by CEN/TC 228 are the following: design of heating systems (water based, electrical etc.); installation of heating systems; commissioning of heating systems; instructions for operation, maintenance and use of

26、 heating systems; methods for calculation of the design heat loss and heat loads; methods for calculation of the energy performance of heating systems. Heating systems also include the effect of attached systems such as hot water production systems. All these standards are systems standards, i.e. th

27、ey are based on requirements addressed to the system as a whole and not dealing with requirements to the products within the system. Where possible, reference is made to other European or International Standards, a.o. product standards. However, use of products complying with relevant product standa

28、rds is no guarantee of compliance with the system requirements. The requirements are mainly expressed as functional requirements, i.e. requirements dealing with the function of the system and not specifying shape, material, dimensions or the like. The guidelines describe ways to meet the requirement

29、s, but other ways to fulfil the functional requirements might be used if fulfilment can be proved. Heating systems differ among the member countries due to climate, traditions and national regulations. In some cases requirements are given as classes so national or individual needs may be accommodate

30、d. In cases where the standards contradict with national regulations, the latter should be followed. BS EN 15316-3-2:2007EN 15316-3-2:2007 (E) 5 EN 15316 Heating systems in buildings Method for calculation of system energy requirements and system efficiencies consists of the following parts: Part 1:

31、 General Part 2-1: Space heating emission systems Part 2-3: Space heating distribution systems Part 3-1: Domestic hot water systems, characterisation of needs (tapping requirements) Part 3-2: Domestic hot water systems, distribution Part 3-3: Domestic hot water systems, generation Part 4-1: Space he

32、ating generation systems, combustion systems (boilers) Part 4-2: Space heating generation systems, heat pump systems Part 4-3: Heat generation systems, thermal solar systems Part 4-4: Heat generation systems, building-integrated cogeneration systems Part 4-5: Space heating generation systems, the pe

33、rformance and quality of district heating and large volume systems Part 4-6: Heat generation systems, photovoltaic systems Part 4-7: Space heating generation systems, biomass combustion systems According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following c

34、ountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,

35、Spain, Sweden, Switzerland and United Kingdom. BS EN 15316-3-2:2007EN 15316-3-2:2007 (E) 6 Introduction This European Standard is one of a number of standards that together describe methods for calculation of system energy requirements and system efficiencies related to domestic hot water systems. I

36、n particular this European Standard specifies methods for calculation of the energy losses of the distribution system. The user needs to refer to other European Standards or to national documents for input data and detailed calculation procedures not provided by this European Standard. Only the calc

37、ulation methods are normative. Values necessary to complete the calculations should be given in a national annex. BS EN 15316-3-2:2007EN 15316-3-2:2007 (E) 7 1 Scope This European Standard is part of a set of standards covering methods for calculation of system energy requirements and system efficie

38、ncies of heating systems in buildings. In particular this European Standard is one of a number of standards dealing with domestic hot water systems. The scope of this specific part is to standardise the methods for calculation of: thermal losses from the domestic hot water distribution system; recov

39、erable thermal losses for space heating from the domestic hot water distribution system; auxiliary energy of the domestic hot water distribution system. These values are input data for calculation of the overall energy use according to prEN 15603 and EN 15316-1. This European Standard specifies the:

40、 inputs; calculation methods; outputs. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendmen

41、ts) applies. Not applicable 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 auxiliary energy electrical energy used by technical building systems for heating, cooling, ventilation and/or domestic hot water to support energy transformation to

42、satisfy energy needs NOTE 1 This includes energy for fans, pumps, electronics etc. Electrical energy input to a ventilation system for air transport and heat recovery is not considered as auxiliary energy, but as energy use for ventilation. NOTE 2 In EN ISO 9488, the energy used for pumps and valves

43、 is called “parasitic energy“. 3.2 building construction as a whole, including its envelope and all technical building systems, for which energy is used to condition the indoor climate, to provide domestic hot water and illumination and other services related to the use of the building NOTE The term

44、 can refer to the building as a whole or to parts thereof that have been designed or altered to be used separately. BS EN 15316-3-2:2007EN 15316-3-2:2007 (E) 8 3.3 circulation loop part of the domestic hot water distribution system where the water circulation is maintained by a pump operating contin

45、uously or in cycles during a day NOTE Where there is a circulation loop, there are heat losses from the pipes during the whole period of water circulation and not only related to hot water draw-offs. 3.4 calculation period period of time over which the calculation is performed NOTE The calculation p

46、eriod can be divided into a number of calculation steps. 3.5 domestic hot water heating process of heat supply to raise the temperature of the cold water to the intended delivery temperature 3.6 domestic hot water distribution system distribution pipes installed between the heat generator or hot wat

47、er storage vessel (if present) and the user outlet or outlets. The domestic hot water distribution system may include a circulation loop and individual sections 3.7 individual section of the domestic hot water distribution system part of the domestic hot water distribution system where the circulati

48、on of the domestic hot water is not maintained by a pump but only due to the draw offs NOTE The heat losses occur due to the energy used in heating up the pipes and fittings of the distribution system. 3.8 energy need for domestic hot water heat to be delivered to the needed amount of domestic hot w

49、ater to raise its temperature from the cold network temperature to the prefixed delivery temperature at the delivery point, not taking into account the technical building thermal systems 3.9 energy use for space heating or cooling or domestic hot water energy input to the space heating or cooling system or the domestic hot water system to satisfy the energy need for space heating or cooling (including dehumidification) or domestic hot water, respectively NOTE If the technical building system serves several purposes (e.g. space heating and domesti