1、BSI Standards PublicationBS ISO 13675:2013Heating systems in buildings Method and design forcalculation of the systemenergy performance Combustion systems (boilers)BS ISO 13675:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 13675:2013.The UK participation
2、 in its preparation was entrusted to TechnicalCommittee RHE/2, Ventilation for buildings, heating and hot waterservices.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contr
3、act. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 74028 2ICS 91.040.01; 91.140.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under
4、 the authority of theStandards Policy and Strategy Committee on 28 February 2014.Amendments issued since publicationDate Text affectedBS ISO 13675:2013 ISO 2013Heating systems in buildings Method and design for calculation of the system energy performance Combustion systems (boilers)Systmes de chauf
5、fage dans les btiments Mthode de conception et de calcul de la performance nergtique des systmes Systmes de combustion (chaudires)INTERNATIONAL STANDARDISO13675First edition2013-11-15Reference numberISO 13675:2013(E)BS ISO 13675:2013ISO 13675:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED
6、 DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permissio
7、n can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 13675:2013ISO 13675:2013(E)
8、 ISO 2013 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms, definitions and symbols 13.1 Terms and definitions . 13.2 Symbols and units 44 Alignment of the parts of the heating system standards 54.1 Physical factors taken into account . 54.2 Inp
9、ut quantities from other parts of the heating system standards . 64.3 Output quantities for other parts of the heating system standards 64.4 Heat balance of the generation sub-system, including control of heat generation 74.5 Generation sub-system basic energy balance 85 Generation sub-system calcul
10、ation . 95.1 Available methodologies. 95.2 Boiler efficiency . 10Annex A (informative) Additional formulas and default values for parametering the boiler efficiency method .19Annex B (informative) General part default values and information .31Annex C (normative) Maximum heating power in the buildin
11、g zone 32Annex D (informative) Calculation examples for modulating condensing boiler 35Annex E (informative) Generation sub-systems and gross calorific values 39Bibliography .43BS ISO 13675:2013ISO 13675:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federatio
12、n 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 the right to be represented on that committee.
13、 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 procedures used to develop this document and thos
14、e 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 editorial rules of the ISO/IEC Directives, Part 2 (s
15、ee 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 identified during the development of the doc
16、ument 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 explanation on the meaning of ISO specific terms an
17、d expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 205, Building environment design
18、.iv ISO 2013 All rights reservedBS ISO 13675:2013ISO 13675:2013(E)IntroductionThis International Standard presents methods for calculation of the energy losses of a heat generation system. The calculation is based on the performance characteristics of the products given in product standards and on o
19、ther characteristics required to evaluate the performance of the products as included in the system.This method can be used for the following applications: judging compliance with regulations expressed in terms of energy targets; optimization of the energy performance of a planned heat generation sy
20、stem, by applying the method to several possible options; assessing the effect of possible energy conservation measures on an existing heat generation system, by calculating the energy use with and without the energy conservation measure.Refer to other International Standards or to regional or natio
21、nal documents for input data and detailed calculation procedures not provided by this International Standard.Heating systems also include the effect of attached systems such as hot water production systems.This International Standard is a systems standards, i.e. it is based on requirements addressed
22、 to the system as a whole and not dealing with requirements to the products within the system.Where possible, reference is made to applicable product standards. However, use of products complying with relevant product standards is no guarantee of compliance with the system requirements.The requireme
23、nts 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.Heating systems and cooling systems differ globally due to climate, traditions and national regulations. In some cases, requiremen
24、ts are given as classes so national or individual needs can be accommodated. ISO 2013 All rights reserved vBS ISO 13675:2013BS ISO 13675:2013Heating systems in buildings Method and design for calculation of the system energy performance Combustion systems (boilers)1 ScopeThis International Standard
25、is the general standard on generation by combustion sub-systems (boilers) for oil, gas, coal and biomass burning.It specifies the required inputs, calculation method, and resulting outputsfor space heating generation by combustion sub-systems (boilers) including control.This International Standard i
26、s also intended for the case of generation for both domestic hot water production and space heating.2 Normative 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
27、applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 7345:1987, Thermal insulation Physical quantities and definitionsISO 13790, Energy performance of buildings Calculation of energy use for space heating and cooling3 Terms, definition
28、s and symbols3.1 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 7345:1987 and the following apply.3.1.1auxiliary energyelectrical energy used by technical building systems for heating, cooling, ventilation and/or domestic water to support energy transf
29、ormation to satisfy energy needsNote 1 to entry: This includes energy for fans, pumps, electronics, etc. Electrical energy input to the ventilation system for air transport and heat recovery is not considered as auxiliary energy, but as energy use for ventilation.3.1.2boilergas, liquid or solid fuel
30、led appliance designed to provide hot water for space heatingNote 1 to entry: It can also be designed to provide domestic hot water heating.INTERNATIONAL STANDARD ISO 13675:2013(E) ISO 2013 All rights reserved 1BS ISO 13675:2013ISO 13675:2013(E)3.1.3biomass boilerbiomass fuelled appliance designed t
31、o provide heating medium (e.g. water, fluid)3.1.4condensing boileroil or gas boiler designed to make use of the latent heat released by condensation of water vapour in the combustion flue productsNote 1 to entry: A condensing boiler allows the condensate to leave the heat exchanger in liquid form by
32、 way of a condensate drain.Note 2 to entry: Boilers not so designed, or without the means to remove the condensate in liquid form, are called non-condensing.3.1.5low temperature boilernon-condensing boiler which can work continuously with a water supply temperature of 35 C to 40 C3.1.6modulating boi
33、lerboiler with the capability to vary continuously (from a set minimum to a set maximum) the fuel burning rate whilst maintaining continuous burner firing3.1.7multistage boilerboiler with the capability to vary the fuel burning rate stepwise whilst maintaining continuous burner firing3.1.8on/off boi
34、lerboiler without the capability to vary the fuel burning rate whilst maintaining continuous burner firingNote 1 to entry: This includes boilers with alternative burning rates set once only at the time of installation, referred to as range rating.3.1.9calculation periodperiod of time over which the
35、calculation is performedNote 1 to entry: The calculation period can be divided into a number of calculation steps.3.1.10calculation stepdiscrete time interval for the calculation of the energy needs and uses for heating, cooling, humidification and dehumidificationNote 1 to entry: Typical discrete t
36、ime intervals are one hour, one month or one heating and/or cooling season, operating modes, and bins.3.1.11combustion powerproduct of the fuel flow rate and the net calorific power of the fuel3.1.12domestic hot water heatingprocess of heat supply to raise the temperature of cold water to the intend
37、ed delivery temperature2 ISO 2013 All rights reservedBS ISO 13675:2013ISO 13675:2013(E)3.1.13external temperaturetemperature of external airNote 1 to entry: For transmission heat transfer calculations, the radiant temperature of the external environment is supposedly equal to the external air temper
38、ature; long-wave transmission to the sky is calculated separately.Note 2 to entry: The measurement of external air temperature is defined in ISO 159273.3.1.14gross calorific valuequantity of heat released by a unit quantity of fuel, when it is burned completely with oxygen at a constant pressure equ
39、al to 101 320 Pa, and when the products of combustion are returned to ambient temperatureNote 1 to entry: This quantity includes the latent heat of condensation of any water vapour contained in the fuel and of the water vapour formed by the combustion of any hydrogen contained in the fuel.Note 2 to
40、entry: According to ISO 13602-22, the gross calorific value is preferred to the net calorific value.3.1.15heat recoveryheat generated by a technical building system or linked to a building use (e.g. domestic hot water) which is utilized directly in the related system to lower the heat input and whic
41、h would otherwise be wastedEXAMPLE Preheating of combustion air by a flue gas heat exchanger.3.1.16heat transfer coefficientfactor of proportionality of heat flow governed by a temperature difference between two environments3.1.17heated spaceroom or enclosure which for the purposes of the calculatio
42、n is assumed to be heated to a given set-point temperature or set-point temperatures3.1.18load factorratio between the time with the boiler on and the total generator operation time3.1.19modes of operationvarious modes in which the heating system can operateEXAMPLE Set-point mode, cut-off mode, redu
43、ced mode, set-back mode, boost mode.3.1.20net calorific valuegross calorific value minus latent heat of condensation of the water vapour in the products of combustion at ambient temperature3.1.21operation cycletime period of the operation cycle of a boiler3.1.22recoverable system thermal losspart of
44、 a system thermal loss which can be recovered to lower either the energy need for heating or cooling or the energy use of the heating or cooling systemNote 1 to entry: This depends on the calculation approach chosen to calculate the recovered gains and losses (holistic or simplified approach). ISO 2
45、013 All rights reserved 3BS ISO 13675:2013ISO 13675:2013(E)3.1.23recovered system thermal losspart of the recoverable system thermal loss which has been recovered to lower either the energy need for heating or cooling or the energy use of the heating or cooling systemNote 1 to entry: This depends on
46、 the calculation approach chosen to calculate the recovered gains and losses (holistic or simplified approach).3.1.24space heatingprocess of heat supply for thermal comfort3.1.25system thermal lossthermal loss from a technical building system for heating, cooling, domestic hot water, humidification,
47、 dehumidification or ventilation that does not contribute to the useful output of the systemNote 1 to entry: A system loss can become an internal heat gain for the building if it is recoverable.Note 2 to entry: Thermal energy recovered directly in the subsystem is not considered as a system thermal
48、loss but as heat recovery and directly treated in the related system standard.3.1.26total system thermal losstotal of the technical system thermal loss, including recoverable system thermal losses3.2 Symbols and unitsFor the purposes of this document, the following symbols and units (Table 1) and in
49、dices (Table 2) apply.Table 1 Symbols and unitsSymbol Name of quantity UnitD day d/mthA area m2Eenergy in general except quantity of heat, mechanical work and auxil-iary (electrical) energyJborWh af factor -P power in general including electrical power kW, WQ quantity of heatJ orWh at time, period of times orH/d, h/mth aW auxiliary (electrical) energyJ orWh aX gas content Vol-% heat transfer coefficient W/(m2K) load factor efficiency temperature CaIf seconds (s) is used as the unit of time, the unit for energy
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