EN 1264-5-2008 en Water based surface embedded heating and cooling systems - Part 5 Heating and cooling surfaces embedded in floors ceilings and walls - Determination of the therma.pdf

1、BS EN1264-5:2008ICS 91.140.10NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDWater based surfaceembedded heating andcooling systemsPart 5: Heating and cooling surfacesembedded in floors, ceilings and walls Determination of the thermal outputThis British Standard

2、was published under theauthority of the StandardsPolicy and StrategyCommittee on 31 May2009. BSI 2009ISBN 978 0 580 57943 1Amendments/corrigenda issued since publicationDate CommentsBS EN 1264-5:2008National forewordThis British Standard is the UK implementation of EN 1264-5:2008.The UK participatio

3、n in its preparation was entrusted to TechnicalCommittee RHE/6, Air or space heaters or coolers without combustion.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract.

4、Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 1264-5:2008EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1264-5October 2008ICS 91.140.10English VersionWater based surface embedded heating and cooling systems

5、-Part 5: Heating and cooling surfaces embedded in floors,ceilings and walls - Determination of the thermal outputSystmes de surfaces chauffantes et refrachissanteshydrauliques intgres - Partie 5: Surfaces chauffantes etrefrachissantes intgres dans les sols, les plafonds et lesmurs - Dtermination de

6、lemission thermiqueRaumflchenintegrierte Heiz und Khlsysteme mitWasserdurchstrmung - Teil 5: Heiz- und Khlflchen inFubden, Decken und Wnden - Bestimmung derWrmeleistung und der KhlleistungThis European Standard was approved by CEN on 13 September 2008.CEN members are bound to comply with the CEN/CEN

7、ELEC 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 application to the CEN Management Centre or to any

8、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 has the same status as theofficial versions.CEN m

9、embers 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, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden,

10、 Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No

11、. EN 1264-5:2008: EBS EN 1264-5:2008EN 1264-5:2008 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative References.5 3 Definitions and symbols .5 4 Calculation method5 5 Prove report6 Annex A (normative) Figures and tables8 Annex B (informative) Explanations concerning the specificati

12、on of the heat exchange coefficients of Table A.1 .11 Bibliography 12 BS EN 1264-5:2008EN 1264-5:2008 (E) 3 Foreword This document (EN 1264-5:2008) has been prepared by Technical Committee CEN/TC 130 “Space heating appliances without integral heat sources”, the secretariat of which is held by UNI. T

13、his 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 2009, and conflicting national standards shall be withdrawn at the latest by April 2009. Attention is drawn to the possibility that some of the

14、 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. This draft European Standard, Water based surface embedded heating and cooling systems, consists of the following parts: Part 1: Definitions

15、 and symbols Part 2: Floor heating: Prove methods for the determination of the thermal output using calculation and test methods Part 3: Dimensioning Part 4: Installation Part 5: Heating and cooling surfaces embedded in floors, ceilings and walls Determination of the thermal output According to the

16、CEN/CENELEC Internal Regulations, the 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

17、, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 1264-5:2008EN 1264-5:2008 (E) 4 Introduction This draft European Standard is based on the realisation that in the field of commercial trade the thermal ou

18、tput of heating and cooling systems represents the basis of rating. In order to be able to evaluate and compare different heating and cooling systems, it is, therefore, necessary to refer to values determined using one single, unambiguously defined method. The basis for doing so are the prove method

19、s for the determination of the thermal output of floor heating systems described in Part 2 of this European Standard. In analogy to the European Standard EN 442-2 (Radiators and convectors Part 2: Test methods and rating), this prove method provides characteristic partial load curves under defined b

20、oundary conditions as well as the characteristic output of the system represented by the standard thermal output together with the associated standard temperature difference between the heating medium and the room temperature. BS EN 1264-5:2008EN 1264-5:2008 (E) 5 1 Scope This European Standard appl

21、ies to water based heating and cooling systems embedded into the enclosure surfaces of the room to be heated or to be cooled. Part 5 of this standard deals with the recalculation of values determined in Part 2 of this European Standard for the system in question, using it for floor heating applicati

22、ons. The recalculation method described in this part of the standard enables the conversion of the calculation and test results of Part 2 into results for other surface orientations in the room, i.e. for ceiling and wall heating, as well as for the application as cooling surfaces, i.e. for floor, ce

23、iling and wall cooling. It has to be emphasised that the test results of Part 2 of this European Standard are the basis of all calculation. Therefore the use of this prove method is necessary whether or not the system in question is used for heating or cooling application. This European Standard sha

24、ll be applied to commercial trade and practical engineering if proved and certifiable values of the thermal output shall be used. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. Fo

25、r undated references, the latest edition of the referenced document (including any amendments) applies. EN 1264-1:1997, Floor heating Systems and components Part 1: Definitions and symbols EN 1264-2:2008,Water based surface embedded heating and cooling systems Part 2: Floor heating: Prove methods fo

26、r the determination of the thermal output using calculation and test methods 3 Definitions and symbols For the purposes of this document, the definitions and symbols given in EN 1264-1:1997 apply. 4 Calculation method The calculation method 1 is based on the results obtained in EN 1264-2. The method

27、 enables the conversion of these results into results for other surfaces in the room (ceiling and wall heating). The method is also applicable for all the cooling surfaces (floor, ceiling, wall cooling). The change in the surface thermal resistance R = (1/) influences the temperature field within th

28、e system in the same way as a change in the thermal resistance of the surface covering R,B1. This is based on the assumptions that all other boundary conditions are unchanged and that the dew point is not reached. This leads to the Equation (1). )1KK(RRR1K)R,R(KK*Floor,HFloor,H*B,B,Floor,HB,HH+=(1)

29、The gradient of the characteristic curve KH(Equation (2) is also referred to as equivalent heat transmission coefficient. The characteristic curve gives the relationship between the specific thermal output q and the temperature difference between the heating medium and the room (heating system) or b

30、etween the room and the cooling medium (cooling system): =HKq (2) BS EN 1264-5:2008EN 1264-5:2008 (E) 6 where KH= KH(R,R,B) is the gradient of the characteristic curve, see Equation 2, of the heating/cooling system which shall be calculated, with the actual thermal resistance of the covering R,B 0 a

31、nd the respective value R(see Table A.1); KH,Floor= KH,Floor(R,B=0) is the gradient of the characteristic curve of the same system with the thermal resistance of the covering R,B= 0 obtained from EN 1264-2; K*H,Floor= K*H,Floor(R*,B) is the gradient of the characteristic curve of the same system wit

32、h a higher thermal resistance of the covering R*,B R,B, obtained from EN 1264-2. In this European Standard, generally R*,B= 0,15 m2K/W applies; Ris the additional thermal transfer resistance to be calculated for the surface in question, see Equation (3) and Table A.1. R= 1/ - 1/10.8 m2K/W) (3) In th

33、e case of wall heating and cooling systems, the results of the calculation method described above stringently are valid only for heating or cooling surfaces which fully cover the respective wall. But the accuracy is also sufficient for cases where the wall is partially covered. 5 Prove report For fl

34、oor heating systems EN 1264-2 applies. For other systems which are recalculated the following applies. For a given construction the results shall be documented for each scheduled pipe spacing T and each scheduled thickness sUabove the pipe. The testing body presents this valid calculation results in

35、 a prove report. The following equations and the standard values (see below) represent the results. qH= f(H,R,B) (4) qC= f(C,R,B) (5) where qHis the specific thermal output of the heating surface His the temperature difference between the average medium temperature and the room qCis the specific the

36、rmal output of the cooling surface Cis the temperature difference between the room and the average medium temperature The Equation (4) and/or Equation (5) are shown in a field of characteristic curves with linear coordinates, see Figure A.1 and Figure A.2. The characteristic curves are drawn for val

37、ues of the thermal resistance R, B= 0, R, B= 0,05, R, B= 0,10 and R, B= 0,15 m2K/W. Values of R, B 0,15 m2K/W are not in accordance with this standard. The values of standard specific thermal output qH,Nand qC,Nare calculated with Equation (2). For heating systems a standard temperature difference H

38、,N= 10 K, BS EN 1264-5:2008EN 1264-5:2008 (E) 7 for cooling systems a standard temperature difference C,N= 8 K applies. A graphic description is given in Figure A.1 and Figure A.2. The proved system shall be identified by a construction drawing and a technical description in accordance with EN 1264-

39、2:2008 Clause 5. These documents shall contain all dimensions and materials which influence the thermal properties. The results are valid for that system defined in such a way. If any change is made by the supplier of the system which affects the principles of the thermal proving, a new proving shal

40、l be carried out. BS EN 1264-5:2008EN 1264-5:2008 (E) 8 Annex A (normative) Figures and tables Y = Specific thermal output qHW/m2 X =Temperature difference between heating medium and room H KFigure A.1 Field of characteristic curves of a heating system BS EN 1264-5:2008EN 1264-5:2008 (E) 9 Y = Speci

41、fic thermal output qcW/m2 X = Temperature difference between room and cooling medium cK Figure A.2 Field of characteristic curves of a cooling system BS EN 1264-5:2008EN 1264-5:2008 (E) 10 Table A.1 Additional thermal transfer resistance Case of application W/(m2K) R= 1/ - 1/10.8 m2K/W Floor heating

42、 10.8 0.000 0 Floor cooling 6.5 0.061 3 Wall heating 8 0.032 4 Wall cooling 8 0.032 4 Ceiling heating 6.5 0.061 3 Ceiling cooling 10.8 0.000 0 BS EN 1264-5:2008EN 1264-5:2008 (E) 11 Annex B (informative) Explanations concerning the specification of the heat exchange coefficients of Table A.1 The cal

43、culation method of EN 1264-2 takes into account the heat transfer on the heating surface in accordance with the Basic Characteristic Curve (see EN 1264-2:2008, Figure A.1). This curve implicates a heat exchange coefficient depending on the temperature difference between the surface and the Standard

44、Indoor Temperature 2. The characteristic curves determined according to this European Standard present the specific thermal output as a function of the difference between the heating/cooling medium temperature and the indoor temperature. This means for the user of the Standard, not to do any calcula

45、tions by directly using values of heat exchange coefficients. Consequently, this European Standard does not include neither values for such an application nor special details or equations concerning heat exchange coefficients on heating or cooling surfaces. Thus, the values of Table 1 of this Europe

46、an Standard are not intended to calculate the specific thermal output directly. In fact, they are provided exclusively for the conversion of characteristic curves in accordance with Equation (1). Such a conversion shall be performed considering the temperature conditions of the respective Standard V

47、alue of the specific thermal output or close to these conditions. This means, in this Standard the value of an application has to be specified according to the respective range of temperature. The publication 4 deals with the heat transfer between heating or cooling surfaces and the room. This publi

48、cation gives special attention to the case if the operative indoor temperature 3 is the reference value of the room temperature. The “sensed“ indoor temperature 2 has a homogeneous definition and is used for reference in this European Standard (denomination: Standard Indoor Temperature). The values

49、of Table A.1 are specified in best compliance with the respective temperature ranges and the conclusions drawn in 4. BS EN 1264-5:2008EN 1264-5:2008 (E) 12 Bibliography 1 Konzelmann, M. and G. Zllner: Thermische Leistungen flchenintegrierter Heiz- und Khlflchen. Published in HLH 56 (2005), No. 3, pp. 30-34. 2 Konzelmann, M. and G. Zllner: Wrmetechnische Prfung von Fubodenheizungen. Published in HLH