BS EN 442-2-2014 Radiators and convectors Test methods and rating《散热器和热空气循环对流加热器 试验方法和级别》.pdf

1、BSI Standards PublicationBS EN 442-2:2014Radiators and convectorsPart 2: Test methods and ratingBS EN 442-2:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 442-2:2014. Itsupersedes BS EN 442-2:1997 which is withdrawn.The UK participation in its preparation

2、was entrusted to TechnicalCommittee RHE/6, Air or space heaters or coolers withoutcombustion.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 contract. Users are responsible

3、for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 82034 2ICS 91.140.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy

4、and Strategy Committee on 31 December 2014.Amendments issued since publicationDate Text affectedBS EN 442-2:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 442-2 December 2014 ICS 91.140.10 Supersedes EN 442-2:1996English Version Radiators and convectors - Part 2: Test methods and rating Ra

5、diateurs et convecteurs - Partie 2 : Mthodes dessai et dvaluation Radiatoren und Konvektoren - Teil 2: Prfverfahren und Leistungsangabe This European Standard was approved by CEN on 11 October 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditi

6、ons for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists i

7、n 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 has the same status as the official versions. CEN members are the national standar

8、ds 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, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slove

9、nia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved

10、worldwide for CEN national Members. Ref. No. EN 442-2:2014 EBS EN 442-2:2014EN 442-2:2014 (E) 2 Contents Page Foreword 4 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms, definitions, symbols and units 6 3.1 Terms and definitions .6 3.2 Symbols and units of measurement . 11 4 Selection of

11、heating appliances to be tested . 12 4.1 Classification . 12 4.2 Selection of models to be tested for determining the thermal outputs of a type 12 4.2.1 Selection of models to be tested when the variable characteristic dimension is the overall height and the cross-section of the variable part is con

12、stant . 12 4.2.2 Selection of models to be tested when the variable characteristic dimension for the type is other than the overall height . 13 4.3 Testing samples submission and identification 14 4.4 Supplementary test. 17 5 Equipment of laboratory and test methods . 17 5.1 Principle . 17 5.2 Appar

13、atus 17 5.2.1 Test system . 17 5.2.2 Reference test installation . 17 5.2.3 Master radiators 20 5.2.4 Verification of test installation repeatability and reproducibility 24 5.2.5 Accuracy of measuring instruments and devices . 29 5.2.6 Calibration of measuring instruments 30 5.3 Preparation for ther

14、mal output test 30 5.4 Test methods . 30 5.4.1 General . 30 5.4.2 Weighing method 31 5.4.3 Electric method . 31 5.4.4 Measurements and calculations . 31 5.4.5 Determination of the characteristic equation 34 5.5 Presentation of results . 35 5.5.1 Standard thermal output of a model . 35 5.5.2 Determin

15、ation of the catalogue outputs of a type made at variable water flow rate . 36 6 Test report . 36 Annex A (normative) Master radiators dimensional verification 39 Annex B (informative) Determination of pressure drop . 46 B.1 Introduction . 46 B.2 Pressure drop equation of a type 47 B.2.1 General . 4

16、7 B.2.2 Pressure drop characteristic equation of a model 47 B.3 Test method . 47 B.3.1 Test circuit . 47 B.3.2 Pressure tappings. 47 B.4 Test procedure Setting up . 48 B.5 Measurements of differential pressures using an inverted U tube manometer . 48 B.5.1 Techniques of measurement . 48 BS EN 442-2:

17、2014EN 442-2:2014 (E) 3 B.5.2 Surface tension effect . 48 B.5.3 Leakage 48 B.5.4 Air pockets in connecting piping . 48 B.5.5 Blocked pressure holes 48 B.5.6 Level of inlet and outlet connections 49 B.5.7 Damping (throttling) of excessive movement (oscillation) of inverted U tube manometer liquid . 4

18、9 Annex C (normative) Least squares regression for a model . 53 Annex D (normative) Analysis of test results by the method of least squares multiple regression . 54 Annex E (normative) Specimen of the test report . 56 Annex F (informative) Apparatus and method for checking the bulk temperature measu

19、ring devices . 60 Annex G (informative) Examples of typical appliances according to Table 4 62 Annex H (normative) Determination of the Mvalues of the master radiators primary set 71 Annex I (normative) Traceability of the thermal output measurement of radiators and convectors . 72 I.1 General . 72

20、I.2 Thermal output traceability 72 I.2.1 Reference test installations 72 I.2.2 Approved test installations 73 I.3 Handling of the Master radiator sets . 73 Annex J (normative) Calibration Procedure. 74 J.1 General . 74 J.2 RRT Organizational course 74 J.3 Test procedure and submission of results . 7

21、5 J.4 Test analysis and assessment . 75 Annex K (normative) Pretreatment and paint testing method . 77 Bibliography 78 BS EN 442-2:2014EN 442-2:2014 (E) 4 Foreword This document (EN 442-2:2014) has been prepared by Technical Committee CEN/TC 130 “Space heating appliances without integral heat source

22、s”, the secretariat of which is held by UNI. 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 June 2015, and conflicting national standards shall be withdrawn at the latest by June 2015. Attention

23、is drawn to the possibility that some of the 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 document supersedes EN 442-2:1996. This document has been prepared under a mandate given to

24、 CEN by the European Commission and the European Free Trade Association. The most significant changes that have been made in this new edition of EN 442-2 are the following ones: some new definitions have been added; the straight or curved towel or bathroom radiator have been included; different surf

25、ace treatments have been included; a new normative Annex J “Calibration Procedure“ has been added; a new normative Annex K “Pretreatment and paint testing method“ has been added. This European Standard comes from an output of the project SMT4 - CT97 - 2127 funded by the European Commission DGXII-RDT

26、. This European Standard, Radiators and convectors, consists of the following parts: Part 1: Technical specifications and requirements; Part 2: Test methods and rating the present document. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following count

27、ries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pol

28、and, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 442-2:2014EN 442-2:2014 (E) 5 Introduction This European Standard results from the recognition that the heating appliances falling into the field of application hereinafter stated are traded

29、on the basis of their thermal output. To evaluate and compare different appliances it is therefore necessary to refer to a single stipulated value, hereinafter called the standard rated thermal output. In addition, for low temperature systems a standard low temperature thermal output is given. The s

30、tandard thermal outputs (standard rated thermal output and standard low temperature thermal output) are defined value taken from the characteristic equation. The pre-requisites of the standard thermal outputs, as defined by this European Standard, are the following: to be representative of the actua

31、l output of the appliance in different operating conditions; to be reproducible within the tolerances defined by this European Standard, taking into account the state of measuring techniques; to be representative of the thermal outputs, obtainable under the same test conditions, of any identical sam

32、ple taken out of the current production (within the tolerances defined by this European Standard taking into account the state of measuring techniques and methods of manufacture). BS EN 442-2:2014EN 442-2:2014 (E) 6 1 Scope This European Standard defines procedures for determining the standard therm

33、al outputs and other characteristics of radiators and convectors installed in a permanent manner in construction works, fed with water or steam at temperatures below 120 C, supplied by a remote energy source. This European Standard specifies the laboratory arrangements and testing methods to be adop

34、ted, the admissible tolerances, the criteria for selecting the samples to be tested and for verifying the conformity of the current production with the samples tested at the initial test. This European Standard also defines the additional common data that the manufacturer shall provide with the prod

35、uct in order to ensure the correct application of the products. This European Standard does not apply to fan assisted radiators, fan assisted convectors and trench convectors and to independent heating appliances. 2 Normative references The following documents, in whole or in part, are normatively r

36、eferenced 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) applies. EN 10088-1, Stainless steels Part 1: List of stainless steels EN ISO/I

37、EC 17025, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025) ISO 16269-7, Statistical interpretation of data Part 7: Median Estimation and confidence intervals 3 Terms, definitions, symbols and units 3.1 Terms and definitions For the purposes of this docu

38、ment, the following terms and definitions apply. 3.1.1 heating appliance device having the purpose of transferring heat in order to provide specific temperature conditions inside buildings 3.1.2 independent heating appliance self-contained heating appliance which does not need to be connected to a r

39、emote energy source (e.g. a boiler) as it contains its own energy source (e.g. gas fired appliances, electric appliances, air to air heat pump appliances) 3.1.3 radiator heating appliance produced with different materials (e.g. steel, aluminium, cast-iron) and with different designs (e.g. plate type

40、, column type, tube type, finned tube type), which emits heat by free convection and radiation 3.1.4 sectional heating appliances (mainly applied to radiators) heating appliance manufactured in sections of identical design and traded in this form which can be joined together into modular assemblies

41、so that the desired output can be obtained BS EN 442-2:2014EN 442-2:2014 (E) 7 3.1.5 free convection heating appliance heating appliance which does not contain a fan or similar device to activate the air flow over heat emitter 3.1.6 convector heating appliance which emits heat almost entirely by fre

42、e convection Note 1 to entry: A convector comprising at least a heat emitter and a casing which provides an unheated convective chimney of defined height. 3.1.7 skirting convector convector of limited height running along the base of an interior wall 3.1.8 height of the unheated convective chimney v

43、ertical distance between the lowest edge of the convector and the bottom of the air outlet section Note 1 to entry: It applies to convectors only, being a main factor influencing their thermal output. 3.1.9 wet heating surface; primary heating surface portion of the heat emitting surface which is al

44、ways in contact with the primary fluid (water or steam) 3.1.10 dry heating surface; secondary heating surface portion of the heat emitting surface which is in contact with air only (e.g. fins projecting from the wet surface) 3.1.11 family of heating appliances group of heating appliances of similar

45、design and construction and of identical material, positions of primary fluid connections and other related variables that particularly affect the conditions of flow of the primary fluid within the heating appliance 3.1.12 type of radiators/convectors group of heating appliances of similar design wh

46、ose cross-section remains unchanged while the height or length varies or which have a systematic variation of only one characteristic dimension of the dry heating surfaces providing that this does not affect the water side (e.g. the height of convector fins on panel radiator) Note 1 to entry: For th

47、e calculation in conformity to Annex D, at least three models are required. 3.1.13 model heating appliance of defined height, length and depth within a type 3.1.14 range of heights difference between the maximum and minimum height of the models in a type 3.1.15 module of heating appliances reference

48、 length of the useful portion of a heating appliance Note 1 to entry: The module coincides with: the section, in the case of sectional heating appliances; a length of 1 m, in the case of non-sectional heating appliances; BS EN 442-2:2014EN 442-2:2014 (E) 8 a finned length of 1 m, in the case of finn

49、ed tube convectors. 3.1.16 sample representative heating appliance used for the determination of one or more of the performance characteristics 3.1.17 inlet water temperature bulk temperature of the water entering the heating appliance 3.1.18 outlet water temperature bulk temperature of the water leaving the heating appliance 3.1.19 temperature drop difference between inlet and outlet water temperature 3.1.20 mean water temperature arithmetical mean of inlet and outlet water temperature 3.1.21 reference air temperature air temperature measu