1、BSI Standards PublicationBS EN 50440:2015Efficiency of domestic electricalstorage water heaters andtesting methodsBS EN 50440:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 50440:2015.The UK participation in its preparation was entrusted to TechnicalCommit
2、tee CPL/59, Performance of household electrical appliances.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 for its correctapplication. The Br
3、itish Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 55737 8ICS 91.140.65Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 Novem
4、ber 2015.Amendments/corrigenda issued since publicationDate Text affectedBS EN 50440:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50440 November 2015 ICS 91.140.65 English Version Efficiency of domestic electrical storage water heaters and testing methods Efficacit des chauffe-eau lectri
5、ques accumulation et mthodes associes Effizienz von elektrischen Warmwasserspeichern fr den Hausgebrauch This European Standard was approved by CENELEC on 2015-10-05. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
6、 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 CENELEC member. This European Standard exists in three official versions
7、 (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committ
8、ees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slo
9、venia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CENELEC All
10、 rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50440:2015 EBS EN 50440:2015EN 50440:2015 (E) 2 Content European foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions 4 4 Symbols and Units . 5 5 Calculation of the electri
11、cal energy efficiency (helecwh) 6 6 Measured parameters 6 7 General conditions for measurements 6 8 Reference conditions . 7 9 Test procedures . 9 10 Data Report 18 Annex A (normative) Calculation of the specific energy efficiency and of the Annual Consumption of electric energy .19 Annex ZZA (infor
12、mative) 21 Annex ZZB (informative) 22 Bibliography 23 BS EN 50440:2015EN 50440:2015 (E) 3 European foreword This document (EN 50440:2015) has been prepared by CLC/TC 59X “Performance of household and similar electrical appliances“. The following dates are fixed: latest date by which this document ha
13、s to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2016-10-05 latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2018-10-05 Attention is drawn to the possibility that some of the elements o
14、f this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association, and supports essen
15、tial requirements of EU Directive(s). For the relationship with EU Directives see informative Annexes ZZA and ZZB, which are integral parts of this document. BS EN 50440:2015EN 50440:2015 (E) 4 1 Scope This European Standard specifies methods for measuring the performance of electric storage water h
16、eaters for the production of sanitary hot water for household and similar use. The object is to state and define the principal performance characteristics of electric storage water heaters and to describe the test methods for measuring these characteristics. NOTE 1 This standard does not apply to; s
17、torage water heaters that use electricity as a secondary source of heating the water; storage water heaters that do not use a tank to storage hot water; electric storage water heaters that do not meet the minimum (or maximum) output performance of the smallest (or biggest) load profile, as defined i
18、n Table 4. NOTE 2 This standard does not specify performance or safety requirements. For safety requirements see EN 60335-1 in conjunction with EN 60335-2-21. 2 Normative references Not applicable. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply.
19、3.1 storage water heater water heater that uses electric heating elements as the means of heating water for long-term storage in a thermally insulated container and provided with a device to control the water temperature 3.2 primary function to heat water for the production of hot water for househol
20、d and similar needs 3.3 energized storage water heater storage water heater that is designed to supply hot water and energised for 24 h per day 3.4 off-peak storage water heater storage water heater that is designed to supply hot water whilst only being supplied with electrical energy at off-peak/lo
21、w tariff periods Note 1 to entry: The off-peak storage water heater is required to fulfil the requirements of the tapping pattern between 7:00h and 22:00h without external energy supply, e.g. to enable operation at off-peak/low-tariff periods and/or to operate in conditions of insecurity of energy s
22、upply. A product qualifies as “off-peak” if it is only energized for a maximum of 8 consecutive hours anywhere between 22:00h and 7:00h during the test with the 24h tapping pattern. 3.5 load profile means the output performance (in terms of flow-rates, temperatures, tapping pattern, etc.) of a stora
23、ge water heater when fulfilling its primary function under specific ambient conditions (see Tables 3 and 4), as declared by the manufacturer BS EN 50440:2015EN 50440:2015 (E) 5 3.6 energy efficiency means the ratio between the delivered energy in the sanitary hot water for its load profile and the c
24、onsumed electrical energy 3.7 storage volume rated quantity of water stored in the appliance Note 1 to entry: This is declared in litres. 3.8 smart control device that automatically adapts the water heating process to individual usage conditions with the aim of reducing energy consumption 3.9 out of
25、 the box-mode standard operating condition, setting or mode set by the manufacturer at factory level, to be active immediately after the appliance installation, suitable for normal use by the end-user according to the water tapping pattern for which the product has been designed and placed on the ma
26、rket 4 Symbols and Units Table 1 Symbols Symbol Unit Description helecwh% Energy efficiency of a storage water heater. Qref kWh Reference energy for the 24 h tapping pattern for the load profile of the water heater.Qelec kWh Electricity consumption with the relevant 24 h tapping pattern. pC mean wat
27、er temperature for the determination of p, measured at the outlet f l/min Minimum flow rate which hot water is contributing to the reference energy as specified in Table 4. Tm C The water temperature at which hot water starts contributing to the reference energy as specified in table 4 TpC Minimum w
28、ater temperature to be achieved during water draw off as specified in Table 4 Qtestelec kWh Measured electricity consumption over 24 h test (step 4).QH2O kWh Useful energy content of the hot water of n drawn-offsdrawingfullwaterVlitres Sum of quantity of hot water totally delivered during the tappin
29、g period. V40_explitres Measured volume delivered at the mean water temperature. V40litres Mixed water quantity delivered at 40C. Cactlitres Actual capacity of Water Heater mactkg Actual weight of water contained inside the tank of the Water Heater smart Presence or not of smart control (value shall
30、 be 0 or 1). SCF Efficiency gain by smart control function. BS EN 50440:2015EN 50440:2015 (E) 6 5 Calculation of the electrical energy efficiency (helecwh) The electrical energy efficiency (helecwh) of a storage water heater is the ratio between the delivered energy in the hot water for the tapping
31、pattern of its load profile and the consumed energy. The consumed energy is the result of the test of the water heater with adjustments for: smart control that can reduce the energy consumption The electrical energy efficiency of a storage water heater shall be calculated as Formula 1: )1( smartSCFQ
32、Qelecrefelecwh=h(1) where: Qref is the delivered energy for the 24 h tapping pattern for the load profile of the water heater, in kWh; Qelecis the consumption of electric energy with the relevant 24 h tapping pattern, in kWh;smart indicates the presence of smart control and is yes = 1, no = 0; NOTE
33、SCF=0 in case no smart control is detected during testing (9.2). 6 Measured parameters The parameters below shall be established following the measurement methods described in following Clauses 7 and 9: a) electricity consumption kWh/d;b) electrical energy efficiency %;c) storage volume litre.7 Gene
34、ral conditions for measurements Measurements shall be carried out with a supply of: Table 2 Electricity Measured quantity Unit Value Permissible deviation (average over test period) Uncertainty of measurement (accuracy) NotesElectricity Power W 2 % energy kWh 2 % voltage, test-period 48 h V 230/ 400
35、 4 % 0,5 % voltage, test-period 48 h V 230/ 400 2 % 0,5 % electric current A 0,5 % frequency Hz 50 1 % BS EN 50440:2015EN 50440:2015 (E) 7 Table 3 gives additional test conditions and tolerances for test outputs (i.e. thermal energy). Table 3 Test conditions and outputs. Set values and tolerances Me
36、asured quantity Unit Value Permissible deviation (average over test period) Permissible deviations of individual measured values Uncertainty of measurement (accuracy) Notes Time Time s 0,1 s Maximum interval between samples (during the deliver of hot water) s 3 Maximum interval between samples (duri
37、ng the no-deliver of hot water) s 60 Sanitary water cold water temperature C/ K 10 C +/- 1 K +/- 1 K +/- 0,5 K* cold water pressure MPa 0,3 MPa 5 % hot water temperature C/ K pattern +/- 0,5 K* a, b volume flowrate l / min pattern 1 % volume measurements l 0,5 % thermal energy kWh pattern 2 % (overa
38、ll) 2 % (or 10Wh) 2 % (or 10Wh) cAmbient air Temperature C/ K 20 C 1 K 1 K a To be measured by “rapid response thermometer“, meaning an instrument that registers within 1 s. at least 90% of the final temperature rise from 15 to 100 C when the sensor is plunged in still water. b Thermocouple with a m
39、aximum diameter of 0,5mm, centred in stream, directly at outlet c Apart from the maximum deviation a correction factor Qref/QH2O is applied, whereby Qref is taken from Table 4 and QH2O is the energy content of the useful water actually delivered during the test. “Useful water“ is water with a temper
40、ature higher than a threshold value Tm for tappings in a profile specified in Table 4. *Together with the publication task it should be mentioned towards the Commission that this tolerance is hard or really not to be reached in practice. All other installation requirements are made according to the
41、manufacturers instructions. 8 Reference conditions Table 4 specifies the tapping patterns for the chosen Load Profile. Parameters in the table are: a) Load Profile XXS-4XL, in header row of table;b) h hour hh:mm starting at 0:00 h;c) QtapkWh useful energy content of water withdrawal to be achieved i
42、n the draw-off;d) f l/min minimum flow rate to be reached during tapping;e) TmC temperature from which counting of useful energy content starts;f) TpC minimum (peak) temperature to be achieved during tapping;g) QrefkWh/d daily (24 h) useful energy content of all water draw-offs, effectively the sum
43、of allQtap.For all tests a cold water temperature of (10 2) C shall be used. As much as possible, the test method uses a black-box approach, i.e. largely technology independent. This means amongst others that the laboratory uses the original appliance thermostat, in the position specified by manufac
44、turer, and at the factory settings. BS EN 50440:20158Table 4Load profileof water heater(reference test tapping patterns)XXSXSSMLXLXXL3XL4XLQtapfTmTpQtapfTmTpQtapfTmTpQtapfTmTpQtapfTmTpQtapfTmTpQtapfTmTpQtapfTmTpQtapfTmTphkWhl/minCCkWhl/minCCkWhl/minCChkWhl/minCCkWhl/minCCkWhl/minCChkWhl/minCCkWhl/mi
45、nCCkWhl/minCC07.000,1052250,10532507.000,1053250,1053250,10532507.000,10532511,2484022,4964007.05 07.051,4006401,40064007.0507.15 07.151,82064007.151,82064007.2607.260,10532507.260,10532507.300,1052250,525335-0,10532507.300,1053250,10532507.3007.4507.450,1053254,42010104007.456,24016104008.01 08.010
46、,1053250,10532508.010,1053255,04242510,08482508.0508.053,60510104008.0508.1508.150,1053250,10532508.150,10532508.2508.250,10532508.2508.300,1052250,10532508.300,1053250,1053250,10532508.300,10532508.4508.450,1053250,1053250,10532508.450,10532509.0009.000,1053250,1053250,10532509.000,1053251,6824253,
47、36482509.300,1052250,10532509.300,1053250,1053250,10532509.300,10532510.0010.000,10532510.000,10532510.3010.300,105310400,105310400,1053104010.300,105310400,842410401,6848104011.0011.000,10532511.000,10532511.300,1052250,10532511.300,1053250,1053250,10532511.300,10532511.450,1052250,10532511.450,105
48、3250,1053250,10532511.450,1053251,6824253,36482512.000,10522512.0012.0012.300,10522512.3012.3012.450,1052250,525335-0,3154105512.450,315410550,315410550,7354105512.450,735410552,523210555,0464105514.3014.300,1053250,1053250,10532514.300,10532515.0015.000,10532515.000,10532515.30 15.300,1053250,10532
49、50,10532515.300,1053252,5224255,04482516.0016.000,10532516.000,10532516.30 16.300,1053250,1053250,10532516.300,10532517.0017.000,10532517.000,10532518.000,1052250,10532518.000,1053250,1053250,10532518.000,10532518.150,1052250,10534018.150,1053400,1053400,10534018.150,10534018.300,10522518.300,1053400,1053400,10534018.300,1053403,3624256,72482519.000,10522519.000,1053250,1053250,10532519.000,10532519.300,10522519.3019.3020.000,105225
