Tumble dryers for commercial use - Methods for measuring the performance

IEC PAS 63124:2017(E) is applicable to tumble dryers for commercial use of the automatic and non-automatic type, incorporating an electric or steam heating device. It also includes tumble dryers which use gas as a heating source with a reference to appropriate EN gas standards.
The object is to state and define the principal performance characteristics of tumble dryers for commercial use of interest to users and to describe standard methods for measuring these characteristics.
It does not apply to transfer tumble dryers or dryers with automatic loading and unloading.

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Publication Date
27-Feb-2022
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Completion Date
28-Feb-2022
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IEC PAS 63124:2017 - Tumble dryers for commercial use - Methods for measuring the performance
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IEC PAS 63124
Edition 1.0 2017-06
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
colour
inside
Tumble dryers for commercial use – Methods for measuring the performance
IEC PAS 63124:2017-06(en)
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IEC PAS 63124
Edition 1.0 2017-06
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
colour
inside
Tumble dryers for commercial use – Methods for measuring the performance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 97.060 ISBN 978-2-8322-4519-4

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – IEC PAS 63124:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 6

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 8

3 Terms, definitions and symbols........................................................................................ 8

3.1 Terms and definitions .............................................................................................. 8

3.2 List of symbols ...................................................................................................... 11

4 Requirements ................................................................................................................ 12

4.1 General ................................................................................................................. 12

4.2 Rated capacity ...................................................................................................... 13

4.3 Dimensions ........................................................................................................... 13

5 Test conditions, materials, equipment and instrumentation ............................................ 13

5.1 General ................................................................................................................. 13

5.2 Ambient conditions................................................................................................ 14

5.2.1 Electricity supply ........................................................................................... 14

5.2.2 Water supply ................................................................................................. 14

5.2.3 Ambient temperature and humidity ................................................................. 15

5.3 Test materials ....................................................................................................... 15

5.3.1 General ......................................................................................................... 15

5.3.2 Test load ....................................................................................................... 15

5.3.3 Detergent ...................................................................................................... 16

5.4 Equipment ............................................................................................................ 16

5.4.1 Equipment for normalization .......................................................................... 16

5.4.2 Equipment for conditioning the test load ........................................................ 16

5.4.3 Equipment for wetting the test load prior to a test .......................................... 16

5.4.4 Equipment for measurement .......................................................................... 16

5.5 Instrumentation and accuracy ............................................................................... 17

6 Preparation for testing ................................................................................................... 17

6.1 General ................................................................................................................. 17

6.2 Test specifications from manufacturers ................................................................. 18

6.3 Installation of the tumble dryer .............................................................................. 18

6.4 Preparation of the tumble dryer for a test series .................................................... 18

6.5 Preparation of the tumble dryer for a test run ........................................................ 18

6.6 Preparation of test loads ....................................................................................... 19

6.6.1 General ......................................................................................................... 19

6.6.2 Pre-treatment of new test load items prior to use ........................................... 19

6.6.3 Requirements regarding the age of test load items ........................................ 19

6.6.4 Normalization of test load items ..................................................................... 19

6.6.5 Conditioning of test load items ....................................................................... 20

6.6.6 Test load composition .................................................................................... 20

6.6.7 Wetting .......................................................................................................... 22

7 Performance measurements – General requirements ..................................................... 23

8 Tests for performance.................................................................................................... 24

8.1 General ................................................................................................................. 24

8.2 Test procedure for performance tests .................................................................... 24

8.2.1 Test conditions, materials and preparation for testing .................................... 24

8.2.2 Programme .................................................................................................... 24

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IEC PAS 63124:2017 © IEC 2017 – 3 –

8.2.3 Test load ....................................................................................................... 25

8.2.4 Test procedure .............................................................................................. 25

8.2.5 Validity of a test run ....................................................................................... 25

8.2.6 Validity of a test series .................................................................................. 25

8.3 Measurements to determine water and energy consumption and programme

time ...................................................................................................................... 26

8.3.1 General ......................................................................................................... 26

8.3.2 Procedure ...................................................................................................... 26

8.4 Measurements to determine condensation efficiency ............................................ 26

8.4.1 General ......................................................................................................... 26

8.4.2 Procedure ...................................................................................................... 27

8.5 Measurements to determine exhaust air volume .................................................... 27

8.6 Performance measurement at maximum exhaust duct pressure ............................ 27

8.7 Measurement of the textile drying temperature ...................................................... 27

9 Assessment of performance .......................................................................................... 27

9.1 General ................................................................................................................. 27

9.2 Final moisture content of the load ......................................................................... 28

9.3 Total energy .......................................................................................................... 28

9.4 Corrected energy .................................................................................................. 28

9.5 Corrected water consumption ................................................................................ 29

9.6 Corrected programme time .................................................................................... 29

9.7 Condensation efficiency ........................................................................................ 30

9.8 Evaporation capacity ............................................................................................. 31

9.9 Exhaust air volume ............................................................................................... 31

10 Data to be reported........................................................................................................ 31

Annex A (normative) Reference list ...................................................................................... 32

A.1 Reference detergent ............................................................................................. 32

A.2 Specification of test load ....................................................................................... 32

A.3 The bone dry method of conditioning .................................................................... 32

A.4 Uncertainty of measurement ................................................................................. 32

A.5 Environmental aspects of tumble dryer use ........................................................... 32

A.6 Source of materials and supplies .......................................................................... 32

A.7 Washing machine for normalization ....................................................................... 32

Annex B (normative) Exhaust ducts for tumble dryer testing ................................................ 33

B.1 General ................................................................................................................. 33

B.2 Specification of the exhaust duct type 1 ................................................................ 33

B.2.1 Duct material ................................................................................................. 33

B.2.2 The form of the duct ...................................................................................... 33

B.2.3 Instrumentation .............................................................................................. 34

B.3 Exhaust duct type 2 .............................................................................................. 34

B.3.1 General ......................................................................................................... 34

B.3.2 Specification of exhaust duct Type 2.............................................................. 34

B.3.3 Setting the correct exhaust duct pressure ...................................................... 34

Annex C (informative) Flow diagrams ................................................................................... 38

Annex D (normative) Test report – Data to be reported ........................................................ 41

Annex E (normative) Procedure to determine test load size where rated capacity is not

declared................................................................................................................................ 45

E.1 General ................................................................................................................. 45

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– 4 – IEC PAS 63124:2017 © IEC 2017

E.2 Determination of the volume of the clothes container ............................................ 45

E.3 Determination of the test load ............................................................................... 45

Annex F (normative) Flexible initial moisture content method ............................................... 46

F.1 General ................................................................................................................. 46

F.2 Procedure ............................................................................................................. 46

F.3 Evaluation ............................................................................................................. 46

Annex G (normative) Performance testing of steam heated tumble dryers ............................ 48

G.1 General ................................................................................................................. 48

G.2 Types of steam heating – Steam heated tumble dryers ......................................... 48

G.3 Specification of steam properties .......................................................................... 48

G.3.1 Type of steam ................................................................................................ 48

G.3.2 Steam generator ............................................................................................ 48

G.4 Equipment and instrumentation ............................................................................. 48

G.4.1 Test equipment for measuring the characteristics of steam ............................ 48

G.4.2 Instruments ................................................................................................... 49

G.5 Installation ............................................................................................................ 49

G.5.1 General ......................................................................................................... 49

G.5.2 Installation of the measurement equipment for indirect steam heated

tumbler dryers.(Alternative 1) ........................................................................ 49

G.5.3 Installation of the measurement equipment for indirect steam heated

tumble dryers. (Alternative 2) ......................................................................... 51

G.6 Preparation for testing .......................................................................................... 52

G.6.1 General ......................................................................................................... 52

G.6.2 Indirect heated tumble dryer installed according to Alternative 1 .................... 52

G.6.3 Indirect heated tumble dryer installed according to alternative 2 .................... 53

G.7 Tests for performance ........................................................................................... 53

G.7.1 General ......................................................................................................... 53

G.7.2 Performance testing of indirect steam heated tumble dryer installed

according to alternative 1 .............................................................................. 53

G.7.3 Performance testing of indirect heated tumble dryers installed according

to Alternative 2 .............................................................................................. 53

G.8 Assessment of performance .................................................................................. 54

G.8.1 General ......................................................................................................... 54

G.8.2 Evaluation of performance of indirect heated tumble dryer installed

according to alternative 1 .............................................................................. 54

G.8.3 Evaluation of performance of indirect heated tumbler dryers installed

according to alternative 2 .............................................................................. 55

G.8.4 Evaluation of total energy supplied to the tumbler dryer by steam .................. 55

G.9 Data to be reported ............................................................................................... 56

Annex H (informative) Performance testing of gas heated tumble dryers .............................. 57

H.1 General ................................................................................................................. 57

H.2 Installation, testing procedure and calculation of supplied gas energy ................... 57

Annex I (informative) Measurement of exhaust air volume ................................................... 58

I.1 Procedure ............................................................................................................. 58

I.2 Exhaust air volume ............................................................................................... 58

Annex J (normative) Measurement of the textile drying temperature .................................... 59

J.1 General ................................................................................................................. 59

J.2 Specification of the loggers ................................................................................... 59

J.3 Preparation of the loggers before measurement .................................................... 59

J.4 Number of loggers ................................................................................................ 59

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IEC PAS 63124:2017 © IEC 2017 – 5 –

J.5 Measuring the temperature ................................................................................... 60

J.6 Presenting the result ............................................................................................. 60

Bibliography .......................................................................................................................... 61

Figure B.1 – Exhaust duct bend ............................................................................................ 33

Figure B.2 – Exhaust duct Type 2 ......................................................................................... 35

Figure C.1 ............................................................................................................................. 39

Figure C.2 ............................................................................................................................. 40

Figure G.1 – Schematic installation of the measurement equipment for steam heated

tumble dryers (Alternative 1) ................................................................................................. 50

Figure G.2 – Schematic installation of the measurement equipment for steam heated

tumble dryers (Alternative 2) ................................................................................................. 52

Table 1 – List of symbols ...................................................................................................... 11

Table 2 – Specification of instruments................................................................................... 17

Table 3 – Number of items in the test load for various test load masses .............................. 21

Table 4 – Specifications for initial moisture content in the test load ...................................... 23

Table 5 – Specification for final moisture content of the test load after drying in a

cotton dry programme ........................................................................................................... 24

Table B.1 – Equivalent tube length of a 90° bend .................................................................. 33

Table B.2 – Pressure drop values for different diameters and flows for a 15 m long duct ..... 36

Table D.1 – Identification data .............................................................................................. 41

Table D.2 – Test measurements ........................................................................................... 42

Table D.3 – Test conditions and materials ............................................................................ 44

Table J.1 – Specification of temperature logger suitable for temperature measurement

for both washing and drying .................................................................................................. 59

Table J.2 – Number of temperature loggers to be used during a textile drying

temperature measurement .................................................................................................... 60

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– 6 – IEC PAS 63124:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TUMBLE DRYERS FOR COMMERCIAL USE –
METHODS FOR MEASURING THE PERFORMANCE
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

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with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

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interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

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other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

A PAS is an intermediate specification not fulfilling the requirements for a standard, but made

available to the public.

IEC PAS 63124 has been processed by subcommittee 59D: Performance of household and

similar electrical laundry appliances, of IEC technical committee 59: Performance of

household and similar electrical appliances.
The text of this PAS is based on the This PAS was approved for
following document: publication by the P-members of the
committee concerned as indicated in
the following document
Draft PAS Report on voting
59D/447/DPAS 59D/451/RVDPAS

Following publication of this PAS, which is a pre-standard publication, the technical committee

or subcommittee concerned may transform it into an International Standard.
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IEC PAS 63124:2017 © IEC 2017 – 7 –
This document is based on CLC/TS 50594:2015.

This PAS shall remain valid for an initial maximum period of 2 years starting from the

publication date. The validity may be extended for a single period up to a maximum of

2 years, at the end of which it shall be published as another type of normative document, or

shall be withdrawn.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
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– 8 – IEC PAS 63124:2017 © IEC 2017
TUMBLE DRYERS FOR COMMERCIAL USE –
METHODS FOR MEASURING THE PERFORMANCE
1 Scope

This PAS is applicable to tumble dryers for commercial use of the automatic and non-

automatic type, incorporating an electric or steam heating device. It also includes tumble

dryers which use gas as a heating source with a reference to appropriate EN gas standards.

The object is to state and define the principal performance characteristics of tumble dryers

for commercial use of interest to users and to describe standard methods for measuring these

characteristics.

NOTE It does not apply to transfer tumble dryers or dryers with automatic loading and unloading.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements of this document. For dated references, only the edition

cited applies. For undated references, the latest edition of the referenced document (including

any amendments) applies.

EN 12953-10, Shell boilers – Part 10: Requirements for feedwater and boiler water quality

EN 50570:2013, Household and similar electrical appliances – Safety – Particular
requirements
...

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