I E C P AS 63 ® Edition 201 7-06 P U B LI C LY AVAI LAB LE S P E C I F I C ATI ON P RE -S TAN D ARD colour i n sid e IEC PAS 631 24:201 7-06(en) Tu m bl e d ryers for com m erci al u se – M e th od s for m eas u ri n g th e pe rform an ce T H I S P U B L I C AT I O N I S C O P YRI G H T P RO T E C T E D C o p yri g h t © I E C , G e n e v a , S wi tz e rl a n d All rights reserved Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IEC's member National Committee in the country of the requester If you have any questions about I EC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local I EC member National Committee for further information IEC Central Office 3, rue de Varembé CH-1 21 Geneva 20 Switzerland Tel.: +41 22 91 02 1 Fax: +41 22 91 03 00 info@iec.ch www.iec.ch Ab ou t th e I E C The I nternational Electrotechnical Commission (I EC) is the leading global organization that prepares and publishes I nternational Standards for all electrical, electronic and related technologies Ab o u t I E C p u b l i ca ti o n s The technical content of IEC publications is kept under constant review by the IEC Please make sure that you have the latest edition, a corrigenda or an amendment might have been published I E C Catal og u e - webstore i ec ch /catal og u e The stand-alone application for consulting the entire bibliographical information on IEC International Standards, Technical Specifications, Technical Reports and other documents Available for PC, Mac OS, Android Tablets and iPad I E C pu bl i cati on s s earch - www i ec ch /search pu b The advanced search enables to find IEC publications by a variety of criteria (reference number, text, technical committee,…) It also gives information on projects, replaced and withdrawn publications E l ectroped i a - www el ectroped i a org The world's leading online dictionary of electronic and electrical terms containing 20 000 terms and definitions in English and French, with equivalent terms in additional languages Also known as the International Electrotechnical Vocabulary (IEV) online I E C G l os sary - s td i ec ch /g l oss ary 65 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002 Some entries have been collected from earlier publications of IEC TC 37, 77, 86 and CISPR I E C J u st Pu bl i s h ed - webstore i ec ch /j u stpu bl i sh ed Stay up to date on all new IEC publications Just Published details all new publications released Available online and also once a month by email I E C C u stom er S ervi ce C en tre - webstore i ec ch /csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csc@iec.ch I E C P AS 63 ® Edition 201 7-06 P U B LI C LY AVAI LAB LE S P E C I F I C ATI ON P RE -S TAN D ARD colour i n sid e Tu m bl e d ryers for com m erci al u se – M e th od s for m eas u ri n g th e pe rform an ce INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 97.060 ISBN 978-2-8322-451 9-4 Warn i n g ! M ake s u re th a t you ob tai n ed th i s p u b l i cati on from an au th ori zed d i stri b u tor ® Registered trademark of the International Electrotechnical Commission –2– I EC PAS 631 24: 201 © I EC 201 CONTENTS FOREWORD Scope Norm ative references Terms, definitions and sym bols Terms and definitions List of sym bols 1 Requirements General Rated capacity Dim ensions Test conditions, m aterials, equipment and instrum entation General Ambient conditions Electricity supply 2 Water supply Ambient tem perature and hum idity 5 Test materials 5 General 5 Test load 5 3 Detergent Equipm ent Equipm ent for normalization Equipm ent for conditioning the test load Equipm ent for wetting the test load prior to a test 4 Equipm ent for measurem ent 5 I nstrumentation and accuracy Preparation for testing General Test specifications from manufacturers I nstallation of the tumble dryer Preparation of the tumble dryer for a test series Preparation of the tumble dryer for a test run 6 Preparation of test loads 6 General 6 Pre-treatm ent of new test load item s prior to use 6 Requirem ents regarding the age of test load item s 6 Normalization of test load item s 6 Conditioning of test load item s 20 6 Test load com position 20 6 Wetting 22 Perform ance m easurements – General requirem ents 23 Tests for perform ance 24 General 24 Test procedure for perform ance tests 24 Test conditions, materials and preparation for testing 24 2 Programm e 24 I EC PAS 631 24:201 © I EC 201 –3– Test load 25 Test procedure 25 Validity of a test run 25 Validity of a test series 25 Measurem ents to determ ine water and energ y consum ption and programm e time 26 General 26 Procedure 26 Measurem ents to determ ine condensation efficiency 26 General 26 Procedure 27 Measurem ents to determ ine exhaust air volume 27 Perform ance m easurement at m axim um exhaust duct pressure 27 Measurem ent of the textile drying temperature 27 Assessm ent of performance 27 General 27 Final moisture content of the load 28 Total energ y 28 Corrected energy 28 Corrected water consumption 29 Corrected program me time 29 Condensation efficiency 30 Evaporation capacity 31 9 Exhaust air volum e 31 Data to be reported 31 Annex A (normative) Reference list 32 A Reference detergent 32 A Specification of test load 32 A The bone dry m ethod of conditioning 32 A Uncertainty of m easurem ent 32 A Environm ental aspects of tumble dryer use 32 A Source of materials and supplies 32 A Washing machine for norm alization 32 Annex B (normative) Exhaust ducts for tum ble dryer testing 33 B General 33 B Specification of the exhaust duct type 33 B 2.1 Duct material 33 B 2.2 The form of the duct 33 B 2.3 I nstrumentation 34 B Exhaust duct type 34 B 3.1 General 34 B 3.2 Specification of exhaust duct Type 34 B 3.3 Setting the correct exhaust duct pressure 34 Annex C (inform ative) Flow diagrams 38 Annex D (norm ative) Test report – Data to be reported 41 Annex E (normative) Procedure to determine test load size where rated capacity is not declared 45 E General 45 –4– I EC PAS 631 24: 201 © I EC 201 E Determination of the volum e of the clothes container 45 E Determination of the test load 45 Annex F (norm ative) Flexible initial m oisture content method 46 F.1 General 46 F.2 Procedure 46 F.3 Evaluation 46 Annex G (norm ative) Performance testing of steam heated tum ble dryers 48 G.1 General 48 G.2 Types of steam heating – Steam heated tum ble dryers 48 G.3 Specification of steam properties 48 G Type of steam 48 G Steam generator 48 G.4 Equipm ent and instrumentation 48 G Test equipm ent for m easuring the characteristics of steam 48 G I nstruments 49 G.5 I nstallation 49 G General 49 G I nstallation of the m easurem ent equipment for indirect steam heated tum bler dryers.(Alternative ) 49 G I nstallation of the m easurem ent equipment for indirect steam heated tum ble dryers (Alternative 2) 51 G.6 Preparation for testing 52 G General 52 G I ndirect heated tum ble dryer installed according to Alternative 52 G I ndirect heated tum ble dryer installed according to alternati ve 53 G.7 Tests for perform ance 53 G General 53 G Performance testing of indirect steam heated tum ble dryer installed according to alternative 53 G Performance testing of indirect heated tumble dryers installed according to Alternative 53 G.8 Assessm ent of performance 54 G General 54 G Evaluation of performance of indirect heated tum ble dryer installed according to alternative 54 G Evaluation of performance of indirect heated tumbler dryers installed according to alternative 55 G Evaluation of total energy supplied to the tum bler dryer by steam 55 G.9 Data to be reported 56 Annex H (inform ative) Performance testing of gas heated tumble dryers 57 H General 57 H I nstallation, testing procedure and calculation of supplied gas energy 57 Annex I (inform ative) Measurement of exhaust air volume 58 I.1 Procedure 58 I.2 Exhaust air volum e 58 Annex J (norm ative) Measurement of the textile drying tem perature 59 J General 59 J Specification of the loggers 59 J Preparation of the loggers before measurem ent 59 J Number of loggers 59 I EC PAS 631 24:201 © I EC 201 –5– J.5 Measuring the temperature 60 J Presenting the result 60 Bibliograph y 61 Figure B – Exhaust duct bend 33 Figure B – Exhaust duct Type 35 Figure C.1 39 Figure C.2 40 Figure G – Schematic installation of the m easurement equipm ent for steam heated tumble dryers (Alternative ) 50 Figure G – Schematic installation of the m easurement equipm ent for steam heated tumble dryers (Alternative 2) 52 Table – List of sym bols 1 Table – Specification of instruments Table – N um ber of items in the test load for various test load masses 21 Table – Specifications for initial m oisture content in the test load 23 Table – Specification for final m oisture content of the test load after dryin g in a cotton dry programm e 24 Table B – Equivalent tube length of a 90° bend 33 Table B – Pressure drop values for different diam eters and flows for a m long duct 36 Table D – I dentification data 41 Table D – Test measurem ents 42 Table D – Test conditions and materials 44 Table J – Specification of tem perature logger suitable for tem perature m easurement for both washing and dryi ng 59 Table J – N um ber of temperature loggers to be used during a textile drying temperature measurem ent 60 –6– I EC PAS 631 24: 201 © I EC 201 INTERNATI ONAL ELECTROTECHNI CAL COMMISSI ON T U M B L E D RYE RS F O R C O M M E RC I AL U S E – M E T H O D S F O R M E AS U RI N G T H E P E RF O R M AN C E FOREWORD ) The I nternati on al Electrotechni cal Com m ission (I EC) is a worl d wid e organi zation for stan dardization com prisin g all n ation al el ectrotechnical comm ittees (I EC National Comm ittees) The object of I EC is to prom ote internati onal co-operation on all q uestions concerni ng stand ardi zati on in the el ectrical an d electronic fi elds To this en d an d i n additi on to other acti vities, I EC publish es I nternational Standards, Techn ical Specificati ons, Technical Reports, Publicl y Avail abl e Specificati ons (PAS) an d Guides (h ereafter referred to as “I EC Publication(s)”) Th ei r preparation is entrusted to tech nical comm ittees; any I EC National Comm ittee interested in th e subj ect dealt with m ay partici pate in this preparatory work I nternational, governm ental an d n on governm ental organ izations liaising with th e I EC also partici pate i n th is preparation I EC collaborates closel y with the I ntern ational Org ani zation for Stand ardi zation (I SO) in accordance with conditions determ ined by agreem ent between th e two organi zati ons 2) The form al decisions or agreem ents of I EC on technical m atters express, as n early as possible, an i nternati onal consensus of opi nion on the rel evant subjects since each technical com m ittee has representati on from all interested I EC N ational Com m ittees 3) I EC Publications have the form of recom m endations for intern ational use an d are accepted by I EC Nati onal Com m ittees in that sense While all reasonable efforts are m ade to ensure that th e tech nical content of I EC Publications is accu rate, I EC cann ot be h eld responsi ble for th e way in which th ey are used or for an y m isinterpretation by an y en d u ser 4) I n order to prom ote intern ational u niform ity, I EC National Com m ittees und ertake to apply I EC Publications transparentl y to the m axim u m extent possible i n th eir national an d regi onal publications Any divergence between an y I EC Pu blication and the correspondi ng national or regi on al publicati on sh all be clearl y in dicated in the latter 5) I EC itself d oes not provi de an y attestation of conform ity I n depend ent certificati on bodies provide conform ity assessm ent services and, in som e areas, access to I EC m arks of conform ity I EC is not responsi ble for an y services carri ed out by ind ependent certification bodi es 6) All users shou ld ensure that th ey have the l atest editi on of thi s publicati on 7) No liability shall attach to I EC or its directors, em ployees, servants or ag ents inclu din g in divi dual experts an d m em bers of its technical com m ittees and I EC N ation al Com m ittees for any person al i nju ry, property d am age or other dam age of any natu re whatsoever, wheth er d irect or indirect, or for costs (includ i ng leg al fees) and expenses arisi ng out of the publ ication, use of, or relian ce upon, this I EC Publication or any oth er I EC Publications 8) Attention is drawn to th e N orm ative references cited in this publication Use of the referenced publ ications is indispensable for the correct applicati on of this publication 9) Attention is drawn to the possibility that som e of the elem ents of this I EC Publication m ay be th e subject of patent rig hts I EC shall not be held responsibl e for identifyi ng any or all such patent ri ghts A PAS is an interm ediate specification not fulfillin g the requirements for a standard, but m ade available to the public I EC PAS 631 24 has been processed by subcom mittee 59D: Performance of household and similar electrical laundry appliances, of I EC technical committee 59: Perform ance of household and similar electrical appliances The text of this PAS is based on the following docum ent: D ft P AS 59D/447/DPAS This PAS was approved for publ ication by th e P-m em bers of the comm ittee concerned as ind icated in the foll owi ng d ocum ent R e p o rt o n vo ti n g 59D/451 /RVDPAS Following publication of this PAS, which is a pre-standard publication, the technical comm ittee or subcomm ittee concerned may transform it into an I nternational Standard I EC PAS 631 24:201 © I EC 201 –7– This document is based on CLC/TS 50594:201 This PAS shall rem ain valid for an initial maxim um period of years starting from the publication date The validity may be extended for a single period up to a maximum of years, at the end of which it shall be published as another type of normative document, or shall be withdrawn I M P O R T AN T th a t it – Th e ' co l ou r i n s i d e' tai n s u n d e rs t a n d i n g c o l o u r p ri n t e r of c o l o u rs i ts wh i ch c o n te n ts logo a re U s e rs on th e co ve r p ag e o f th i s c o n s i d e re d sh ou l d to t h e re fo re be p ri n t p u b l i c ati o n u s e fu l th i s fo r i n d i c a te s th e d o cu m en t c o rre c t u sin g a –8– I EC PAS 631 24: 201 © I EC 201 T U M B L E D RYE RS F O R C O M M E RC I AL U S E – M E T H O D S F O R M E AS U RI N G T H E P E RF O R M AN C E S cop e This PAS is applicable to for comm ercial use of the and type, incorporating an electric or steam heating device I t also includes which use gas as a heating source with a reference to appropriate EN gas standards tu m b l e d ry e rs a u to m ati c au to m at i c n on - tu m b l e d ry e rs The object is to state and define the principal performance characteristics of for commercial use of interest to users and to describe standard methods for m easuring these characteristics tu m b l e NOTE I t does not appl y to t n s fe r t u m b l e d r ye r s d ry e rs or dryers with autom atic loadi ng and u nl oadi ng N o rm a t i ve re fe re n c e s The following docum ents are referred to in the text in such a way that some or all of their content constitutes requirem ents of this docum ent For dated references, onl y the edition cited applies For undated references, the latest edition of the referenced docum ent (including an y am endm ents) applies EN 2953-1 0, Shell boilers – Part 10: Requirements for feedwater and boiler water quality EN 50570: 201 3, Household and similar electrical appliances – Safety – Particular requirements for commercial electric tumble dryers CLC/TS 50640:201 5, Clothes washing machines for commercial use – Methods for measuring the performance EN 60456: 201 , Clothes washing machines for household use – Methods for measuring the performance (I EC 60456: 201 0, modified) EN 60734, Household electrical appliances – Performance – Water for testing (I EC 60734) EN 62053-21 , Electricity metering equipment (a.c ) – Particular requirements – Part 21: Static meters for active energy (classes and 2) (I EC 62053-21 ) ISO 80000-1 : 2009, Quantities and units – Part 1: General T e rm s , d e fi n i t i o n s a n d s ym b o l s T e rm s a n d d e fi n i t i o n s For the purposes of this docum ent, the following terms and definitions apply t u m b l e d ry e r appliance in which textiles are dried by tumbling in a rotating drum, through which air is passed – 50 – I EC PAS 631 24:201 © I EC 201 The steam flow entering the m easurement instrum ents shall be as undisturbed as possible and therefore the steam measurement equipm ent (1 ) shall be placed together and with a straight part of the steam suppl y pipe prior and after the instruments according to the instrument suppliers instruction Also the tube diam eter shall be according to the instructions and shall not change in diam eter from where the straight suppl y steam tube starts and ends The steam trap (4) shall be placed so condensed water can be drained from the suppl y steam tube The shut off valve (2) and the steam measurement equipment (1 ) shall be placed as close as possible to the dryer under test The steam suppl y pipe from the steam measurement equipm ent (1 ) to the dryer under test shall not be longer than , m After the steam battery (6) a tem perature sensor (8) shall be installed and close to the sensor a steam trap (7) shall be placed IEC Key suppl y steam m easurem ent equipm ent consistin g of steam flow m eter, tem perature sen sor an d pressure transd ucer shut off val ve indi rect steam heated tum ble d ryer steam trap drain val ve steam battery steam trap tem peratu re sensor Figure G.1 – Schematic installation of the measurement equipment for steam heated tumble dryers (Alternative ) I EC PAS 631 24:201 © I EC 201 G I n s ta l l ati o n d ry e rs – 51 – o f t h e m e a s u re m e n t e q u i p m e n t fo r i n d i re c t s t e a m h e a t e d t u m b l e ( Al t e rn a t i v e ) Figure G shows an alternative schem atic installation of the m easurement equipm ent for indirect steam heated tumble dryers This installation will give a possibility to com pare the amount of steam supplied to the dryer with the am ount of condensate water recovered in the tank The steam flow entering the measurement instruments shall be as undisturbed as possible and therefore the steam measurement equipment (1 ) shall be placed together and with a straight part of the steam supply pipe prior and after the instrum ents according to the instrument suppliers instruction Also the tube diam eter shall be according to the instructions and shall not change in diam eter from where the straight suppl y steam tube starts and ends The steam trap (4) shall be placed so condensed water can be drained from the suppl y steam tube The shut off valve (2) and the steam measurement equipment (1 ) shall be placed as close as possible to the dryer under test The steam suppl y pipe from the steam measurem ent equipm ent (1 ) to the dryer under test shall not be longer th an , m After the steam battery (6) a tem perature sensor (8) shall be installed and close to the sensor a steam trap (7) shall be placed The condensate is recovered in a water tank (1 2) placed on a scale (1 0) The condensate water hose from the steam trap to the tank is equipped with a drain valve (9) and a shut off valve (1 ) The hose shall not have an y ph ysical connection with the tank in order not to disturb the m ass m easurement of the condensate water – 52 – I EC PAS 631 24:201 © I EC 201 11 12 10 IEC Ke y suppl y steam m easurem ent equipm ent consisting of steam flow m eter, tem perature sen sor and pressure transd ucer shut off val ve indi rect steam heated tum ble d ryer steam trap drain val ve steam battery steam trap tem peratu re sensor drain val ve 10 scale 11 shut off val ve 12 water tank F i g u re G – S c h e m a t i c i n s t a l l a t i o n fo r s t e a m G.6 G.6.1 h eated o f t h e m e a s u re m e n t e q u i p m e n t t u m b l e d ry e rs ( Al t e rn a t i v e ) P re p a t i o n fo r t e s t i n g G e n e l The ambient conditions shall follow the specifications given in The tum ble dryer shall be installed according to the m anufacturer’s instructions The dim ension of the steam hoses shall be in accordance with the installation instructions G.6.2 I n d i re c t h e a t e d t u m b l e d ry e r i n s t a l l e d a c c o rd i n g t o Al t e rn a t i v e The tum ble dryer shall be prepared for testing according to Clause with following additions: Before the start of a test series the tumble dryer under test shall be run once with a full test load according to Table After this initial run of the tumble dryer under test a test series shall start within d of the initial run but not sooner than d after the cleaning run An y remaining I EC PAS 631 24:201 © I EC 201 – 53 – condensate within the test tum ble dryer itself shall not be rem oved between the initial run and the start of a test series G.6 I n d i re c t h e a t e d t u m b l e d ry e r i n s t a l l e d a c c o rd i n g t o a l t e rn a t i v e The tum ble dryer shall be prepared for testing according to Clause with following additions: Before the start of a test series the tum ble dryer under test shall be run once with a full test load according to Table After this initial run of the tum ble dryer under test a test series shall start within d of the initial run but not sooner than d after the cleaning run After this initial run the drain valve (9) shall be opened in order to drain the condensate collected in the condensate hose The am ount of water (see G.7 3) in the tank (1 2) shall be reset to the start level An y other rem aining condensate within the test dryer itself may not be rem oved between the initial run and the start of a test series G.7 G.7.1 T e s t s fo r p e rfo rm a n c e G e n e l This subclause contains inform ation about the test procedure for perform ance m easurem ents on steam heated tum ble dryers and the additional requirements needed G.7.2 P e rfo rm a n c e t e s t i n g o f i n d i re c t s t e a m h e a t e d t u m b l e d ry e r i n s t a l l e d a c c o rd i n g t o a l t e rn a t i v e All performance tests shall be according to Clause and according to following additional requirem ents: The tests shall be performed with the steam pressure and flow rate recommended by the manufacturer Before each test run the steam hoses outside the dryer under test shall be flushed with steam ensuring that the steam is as dry as possible wh en entering into the dryer under test Close the shut off valve (2) and open the drain valve (5) and flush the steam until no condensate is visible in the valve outlet The flushing shall occur immediate before the start of the test run Close drain valve (5) and open the shut off valve (2) and start the test run The measured values from the steam m easurement equipment (steam pressure, steam flow rate and steam temperature shall be recorded by the steam energ y calculator and required output data shall be calculated and reported according to G.8 The mass of steam (kg) calculated by the Steam energy calculator shall be recorded and reported according to G The average tem perature of the condensate shall be recorded via the temperature sensor (8) G.7.3 P e rfo rm a n c e t e s t i n g o f i n d i re c t h e a t e d t u m b l e d ry e rs i n s t a l l e d a c c o rd i n g t o Al t e rn a t i v e G.7.3 G e n e l All performance tests shall be according to Clause and according to following additional requirem ents: The tests shall be performed with the steam pressure and flow rate recommended by the manufacturer – 54 – I EC PAS 631 24:201 © I EC 201 The tank (1 2) shall be filled with water The am ount of water shall be approximately tim es the expected am ount of condensate and the vertical water distance between the steam outlet in the tank and the water surface shall be so high that all steam not yet condensed will condensate before breaking the water surface The mass of the tank (1 2) with water shall be recorded Before each test run the steam hoses outside the dryer under test shall be flushed with steam ensuring that the steam is as dry as possible wh en entering into the dryer under test Close the shut off valve (2) and open the drain valve (5) and flush the steam until no condensate is visible in the valve outlet The flushing shall occur immediate before the start of the test run Close drain valve (5) and open the shut off valve (2) and start the test run The m easured values from the steam m easurement equipm ent (steam pressure, steam flow rate and steam tem perature shall be recorded by the steam energ y calculator and required output data shall be calculated and reported according to G.8 The average temperature of the condensate shall be recorded via the temperature sensor (9) After each test run shut off valve (1 ) shall be closed and valve (9) shall be opened The water in the condensate water hose shall be collected and poured into the tank (1 2) When the condensate water hose is em pty the shut off valve (1 ) shall be opened again so an y rem aining water in the condensate water hose can flow into the tank (1 2) The total mass of the tank (1 2) shall now be recorded G.7.3.2 Control of accuracy The m ass of the steam supplied to the tumble dryer as calculated by the steam energ y calculator can be com pared with the m ass of the condensate calculated as the difference of the m ass of the tank after and before the test run I f the mass values differ more than % the run shall be regarded as not valid G.8 Assessment of performance G.8.1 General This subclause sets out the evaluation methods for the assessm ent of the energ y perform ance of steam heated tum ble dryers G.8.2 G.8.2.1 Evaluation of performance of indirect heated tumble dryer installed according to alternative General This subclause sets out the evaluation of supplied steam energ y, energy recovered in the condensate and the total steam energ y supplied to indirect heated tumbler dryers installed according to Alternative G.8.2.2 Evalu ation of supplied steam energy The steam energ y supplied to an indirect heated tum bler dryer Eist is the energ y measured by the steam energy calculator G.8.2.3 Evalu ation of the energy to be recovered through the condensate The recovered energ y of condensate water Ecs is calculated as: Ecs = Mdst x Tc /860 I EC PAS 631 24:201 © I EC 201 – 55 – Tc = Tcs if Tcs is < 00°C Tc = 00°C if Tcs where Mdst Tc Tcs Wcs /860 G.8.3 is is is is is the the the the the is ≥ 00°C mass of steam supplied to the tum ble dryer during a test run condensate temperature tem perature recorded by the tem perature sensor (8) energy of the recovered condensate energy equivalent Evalu ation of performance of indirect heated tumbler dryers installed according to alternative G.8.3.1 General This section sets out the evaluation of supplied steam energ y, energ y recovered in the condensate and the total steam energy supplied to indirect heated tum ble dryer installed according to Alternative G.8.3.2 Evaluation of supplied steam energy The steam energ y supplied to an indirect heated tumble dryer Eist is the energy m easured by the steam energ y calculator G.8.3.3 Evaluation of the energy to be recovered through the condensate The recovered energy of condensate water is calculated as: Mcw = MT1 – MT2 Tc = Tcs if Tcs is < 00°C Tc = 00°C if Tcs is ≥ 00°C Ecs = Mcw x Tc /860 where Mcw MT1 MT2 Tc Tcs Wcs /860 G.8.4 is is is is is is is the the the the the the the recovered amount of condensate water; mass of the tank (1 2) at the end of the procedures described in G 3; mass of the tank (1 2) at the start of the test run ; condensate temperature; tem perature recorded by the temperature sensor (8); energ y of the recovered condensate; energ y equivalent Evaluation of total energy su pplied to the tumbler dryer by steam The total steam energy Est for an indirect steam heated tum ble dryer is equal to: Est = Eist - Ecs – 56 – G.9 I EC PAS 631 24:201 © I EC 201 Data to be reported The value of the total steam energy Est and the m ass of the supplied steam Mdst shall be reported in Table D I EC PAS 631 24: 201 © I EC 201 – 57 – An n e x H (informative) P e rfo rm a n c e te s ti n g o f g a s h e a te d t u m b l e d rye rs H.1 G e n e l This annex gives references to CEN standards related to the safety and measurem ent of gas fired t u m b l e d ry e rs H.2 I n s ta l l a ti o n , t e s t i n g p ro c e d u re a n d c a l c u l a t i o n o f s u p p l i e d g a s e n e rg y The dryer shall be installed according to reference given in a future standard, EN ZZZZZ NOTE At the tim e of introd ucing this PAS, the concerned docum ent was not ready for pu blication, nor gi ven an EN num ber All safety issues required shall be followed Specification for the gas energy measurement is given in Table The testing procedure shall follow the procedure given in Clauses 6, and Formulae for calculating the supplied gas energy can be found in EN 458-2 – 58 – I EC PAS 631 24:201 © I EC 201 An n e x I (informative) M e a s u re m e n t o f e x h a u s t a i r vo l u m e I.1 P ro c e d u re The volumetric flow rate of exhaust air shall be measured while the is operating without a load and with the heater switched off The shall be attached to the standard exhaust described in Annex B and the m easurem ent shall be m ade using the equipm ent described in EN I SO 51 67-1 t u m b l e d ry e r tu m b l e d ry e r The pressure at the outlet of the standard exhaust and in the vicinity of the dryer relative to the environment shall be maintained at Pa at the operating flow rate The air temperature, humidity and pressure shall be maintained at 23 °C, 55 % RH and ,01 × Pa respectivel y NOTE A form al procedu re for this test is under devel opm ent I.2 E xh a u s t a i r vo l u m e Exhaust air volum e V is calculated from the volum etric flow rate and the duration of the and expressed in cubic metres: ru n V = F×t where F t is the volum etric flow rate m easured according to EN I SO 51 67-1 ; and is the average p ro g m m e t i m e te s t I EC PAS 631 24:201 © I EC 201 – 59 – Annex J (normative) Measurement of the textile drying temperature J.1 General The textile drying tem perature shall be m easured by temperature loggers placed am ong the test load in the drying basket and following the load during the drying procedure J.2 Specification of the loggers The specification of the tem perature logger is given in Table J Table J.1 – Specification of temperature logger suitable for temperatu re measurement for both washing and drying Tem peratu re range °C – 50 °C Accuracy ≤ 0, °C over full ran ge Resol ution ≤ 0, °C Response tim e TC (1 – 90 %) a water ≤ m in Response tim e TC (1 – 90 %) a m oving r(2 m /sec) ≤ m in Sam pling rate ≤ 10 s Max m ass 70 g a J.3 TC (1 %–90 %) is the tim e it takes for the sensor to traverse between % and 90 % of its final valu e Response tim e can also be expressed as a TC 63 % val ue The 63 % fi gu re is the ti m e for the sensor to reach 63 % of its final val ue TC %–90 % an d the TC 63 % value are of approxi m ately the sam e m agnitude for a given sensor Preparation of the loggers before measurement The tem perature logger shall be placed in a textile pocket made of the sam e fabric as the test load The size of the pocket shall not be excessivel y larger than the logger By doing this the logger will be protected from extensive shocks when hitting the basket walls and also an y damage to the test load will be minim ized The pocket shall be closed by cl ips or by an y other means I n order to make the logger follow the motion pattern of the test load as close as possible the pocket shall be attached to one of the m edium -sized test sheets J.4 Number of loggers Following number of tem perature loggers shall be placed in the tu mble dryer depending on the size of the dryer The num ber of tem perature loggers to be placed in the dryer is dependent on the size of the dryer as described in Table J – 60 – I EC PAS 631 24:201 © I EC 201 Table J.2 – Nu mber of temperatu re loggers to be used during a textile drying temperature measurement J.5 Size of drying basket Number of temperature loggers to use < 200 l 200 l – 000 l > 000 l Measuring the temperature The loggers shall be placed in the middle of the load before the d rying sequence is started I f more than one logger is used they shall be placed evenl y within the drum The loggers shall follow the drying textiles throughout the drying process until the end of the programme Directl y after the programme end the loggers shall be removed and the logged data loaded to a computer J.6 Presenting the result The tem perature data obtained by the logger shall preferabl y be presented as a curve showing the temperature during the whole drying process The result can be presented as individual tem perature profiles for each logger or as a m ean value of the loggers for each time point I f m ax drying tem perature shall be reported max drying tem perature shall be defined as the highest tem perature measured during the drying cycle by an y logg er I EC PAS 631 24:201 © I EC 201 – 61 – Bibliography [1 ] EN 458-2, Domestic direct gas-fired tumble dryers of types B22D and B23D, of [2] EN 60704-1 : 201 0, Household and similar electrical appliances – Test code for the determination of airborne noise – Part 1: General requirements (IEC 60704-1:2010) [3] EN I SO 51 67-1 , Measurement of fluid flow by means of pressure differential devices [4] nominal heat input not exceeding kW – Part 2: Rational use of energy inserted in circular cross-section conduits running full – Part 1: General principles and requirements (ISO 5167-1) I EC Guide 09: 2003, Environmental aspects – Inclusion in 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