1、BRITISH STANDARDBS EN 15316-2-3:2007Heating systems in buildings Method for calculation of system energy requirements and system efficiencies Part 2-3: Space heating distribution systemsThe European Standard EN 15316-2-3:2007 has the status of a British StandardICS 91.140.10g49g50g3g38g50g51g60g44g4
2、9g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 15316-2-3:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on
3、 31 August 2007 BSI 2007ISBN 978 0 580 56021 7National forewordThis British Standard is the UK implementation of EN 15316-2-3:2007. The UK participation in its preparation was entrusted to Technical Committee RHE/24, Central heating installations.A list of organizations represented on this committee
4、 can be obtained on request to its secretary.This publication does not 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 issued since publication
5、Amd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 15316-2-3July 2007ICS 91.140.10English VersionHeating systems in buildings - Method for calculation of systemenergy requirements and system efficiencies - Part 2-3: Spaceheating distribution systemsSystmes de chauffage dans les
6、btiments - Mthode decalcul des besoins nergtiques et des rendements dessystmes - Partie 2-3: Systmes de distribution dechauffage des locauxHeizsysteme in Gebuden - Verfahren zur Berechnung derEnergieanforderungen und Nutzungsgrade der Anlagen -Teil 2-3: WrmeverteilungssystemeThis European Standard w
7、as approved by CEN on 21 June 2007.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 natio
8、nalstandards may be obtained on application 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 noti
9、fied to the CEN Management Centre 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
10、, Netherlands, Norway, Poland, Portugal,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 exploitat
11、ion in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15316-2-3:2007: EEN 15316-2-3:2007 (E) 2 Contents Page Foreword4 Introduction .6 1 Scope 7 2 Normative references 7 3 Terms and definitions .7 4 Symbols, units and indices 9 5 Principle of the method and definiti
12、ons 10 6 Auxiliary energy demand 12 6.1 General12 6.2 Design hydraulic power 12 6.3 Detailed calculation method.13 6.3.1 Input/output data13 6.3.2 Calculation method14 6.3.3 Correction factors15 6.3.4 Expenditure energy factor 17 6.3.5 Intermittent operation21 6.4 Deviations from the detailed calcul
13、ation method.23 6.5 Monthly auxiliary energy demand23 6.6 Recoverable auxiliary energy.24 7 System thermal loss of distribution systems .24 7.1 General24 7.2 Detailed calculation method.24 7.2.1 Input/output data24 7.2.2 Calculation method25 7.2.3 Thermal losses of accessories.26 7.2.4 Recoverable a
14、nd un-recoverable system thermal loss .27 7.2.5 Total system thermal loss.27 7.3 Calculation of linear thermal transmittance (W/mK):.27 7.4 Calculation of mean part load of distribution per zone .28 8 Calculation of supply and return temperature depending on mean part load of distribution.28 8.1 Tem
15、perature calculation of heat emitters .28 8.1.1 General28 8.1.2 Continuous control depending on outdoor temperature 29 8.1.3 Continuous control with thermostatic valves.29 8.1.4 On-Off control with room thermostat 30 8.2 Effect of by-pass connections30 8.3 Effect of mixing valves31 8.4 Parallel conn
16、ection of distribution circuits.32 8.5 Primary circuits33 Annex A (informative) Preferred procedures .34 A.1 Simplified calculation method for determination of annual auxiliary energy demand 34 A.1.1 Input/output data34 A.1.2 Calculation method35 A.1.3 Correction factors37 A.1.4 Expenditure energy f
17、actor 37 A.1.5 Intermittent operation38 A.1.6 Monthly auxiliary energy demand and recoverable auxiliary energy 38 EN 15316-2-3:2007 (E) 3 A.2 Tabulated calculation method for determination of annual auxiliary energy demand 39 A.2.1 Input/output data .39 A.2.2 Calculation method, tabulated values.39
18、A.2.3 Monthly auxiliary energy demand and recoverable auxiliary energy 41 A.3 Simplified calculation method for determination of annual system thermal loss41 A.3.1 Input/output data .41 A.3.2 Calculation method .42 A.3.3 Approximation of the length of pipes per zone in distribution systems .42 A.3.4
19、 Default values of the outer total surface coefficient of heat transfer (convection and radiation) 43 A.3.5 Approximation of -values 43 A.3.6 Equivalent length of valves 44 A.3.7 Default values for the exponent of the heat emission system .44 A.4 Tabulated calculation method for determination of ann
20、ual system thermal loss44 A.4.1 Input/output data .44 A.4.2 Calculation method, tabulated values.45 A.5 Example46 Bibliography49 EN 15316-2-3:2007 (E) 4 Foreword This document (EN 15316-2-3:2007) has been prepared by Technical Committee CEN/TC 228 “Heating systems in buildings”, the secretariat of w
21、hich is held by DS. 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 January 2008, and conflicting national standards shall be withdrawn at the latest by January 2008. This document has been prepar
22、ed under a mandate given to CEN by the European Commission and the European 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
23、the methodology for calculation of the energy performance of buildings. 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; commissionin
24、g of heating systems; instructions for operation, maintenance and use of 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 wate
25、r production systems. All these standards are systems standards, i.e. they 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 st
26、andards. However, use of products complying with relevant product standards 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, dime
27、nsions or the like. The guidelines describe ways to meet the requirements, 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
28、 are given as classes so national or individual needs may be accommodated. In cases where the standards contradict with national regulations, the latter should be followed. EN 15316 Heating systems in buildings Method for calculation of system energy requirements and system efficiencies consists of
29、the following parts: Part 1: General EN 15316-2-3:2007 (E) 5 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: Domes
30、tic hot water systems, generation Part 4-1: Space heating 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 system
31、s Part 4-5: Space heating generation systems, the performance 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
32、 national standards organizations of the following countries 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, Nor
33、way, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 15316-2-3:2007 (E) 6 Introduction In a distribution system, energy is transported by a fluid from the heat generation to the heat emission. As the distribution system is not adiabatic, part of the e
34、nergy carried is emitted to the surrounding environment. Energy is also required to distribute the heat carrier fluid within the distribution system. In most cases this is electrical energy required by the circulation pumps. This leads to additional thermal and electrical energy demand. The thermal
35、energy emitted by the distribution system and the electrical energy required for the distribution, may partially be recovered as heat, if the distribution system is placed inside the heated envelope of the building. This European Standard provides three methods of calculation. The detailed calculati
36、on method describes the basics and the physical background of the general calculation method. The required input data are part of the detailed project data assumed to be available (such as length of pipes, type of insulation, manufacturers data for the pumps etc.). The detailed calculation method pr
37、ovides the most accurate energy demand and heat emission. For the simplified calculation method, some assumptions are made for the most relevant cases, reducing the required input data (e.g. the lengths of pipes are calculated by approximations depending on the outer dimensions of the building and e
38、fficiency of pumps is approximated). This method may be applied if only few data are available (in general at an early stage of design). With the simplified calculation method, the calculated energy demand is generally higher than the calculated energy demand by the detailed calculation method. The
39、assumptions made for the simplified method depend on national design, and therefore this method is part of informative Annex A. The tabulated calculation method is based on the simplified calculation method, with some further assumptions being made. Only input data for the most important influences
40、are required with this method. The further assumptions made for this method depend on national design as well, and therefore the tabulated method is also part of informative Annex A. Other influences, which are not reflected by the tabulated values, shall be calculated by the simplified or the detai
41、led calculation method. The energy demand determined from the tabulated calculation method is generally higher than the calculated energy demand by the simplified calculation method. Use of this method is possible with a minimum of input data. The general calculation method for the electrical energy
42、 demand of pumps consists of two parts. The first part is calculation of the hydraulic demand of the distribution system, and the second part is calculation of the expenditure energy factor of the pump. Here, it is possible to combine the detailed and the simplified calculation method. For example,
43、calculation of pressure loss and flow may be done by the detailed calculation method and calculation of the expenditure energy factor may be done by the simplified calculation method (when the data of the building are available and the data of the pump are not available) or vice versa. In national a
44、nnexes, the simplified calculation method as well as the tabulated calculation method could be applied through a.o. relevant boundary conditions of each country, thus facilitating easy calculations and quick results. In national annexes, it is only allowed to change the boundary conditions and other
45、 assumptions. The calculation methods as described are to be applied. The recoverable part of the auxiliary energy demand is given as a fixed ratio and is therefore also easy to determine. EN 15316-2-3:2007 (E) 7 1 Scope This European Standard provides a methodology to calculate/estimate the system
46、thermal loss of water based distribution systems for heating and the auxiliary energy demand, as well as the recoverable part of each. The actual recovered energy depends on the gain to loss ratio. Different levels of accuracy, corresponding to the needs of the user and the input data available at e
47、ach design stage of the project, are provided in this European Standard by different calculation methods, i.e. a detailed calculation method, a simplified calculation method and a method based on tabulated values. The general method of calculation can be applied for any time-step (hour, day, month o
48、r year). Pipework lengths for the heating of decentralised, non-domestic ventilation systems equipment are to be calculated in the same way as for water based heating systems. For centralised, non-domestic ventilation systems equipment, the length is to be specified in accordance with its location.
49、NOTE It is possible to calculate the system thermal loss and auxiliary energy demand for cooling systems with the same calculation methods as shown in this European Standard. Specifically, determination of auxiliary energy demand is based on the same assumptions for efficiency of pumps, because the efficiency curve applied is an approximation for inline and external motors. It needs to be decided by the standardisation group of CEN, whether or not the extension for cooling systems should be made in this European Standard. This is also valid for distributio
