Household and similar electric appliances - Methods for measuring the performance of tumble dryers intended for commercial use

This European standard is applicable to tumble dryers intended to be used by trained users e.g. in hotels, hospitals, factories, in light industry and on farms. It covers tumble dryers declared for commercial use in public areas and operated by lay persons e.g. in launderettes, apartment houses and communal laundry rooms. This European standard covers tumble dryers which use electricity, gas or steam as a heating source.
The object is to state and define the principal performance characteristics of tumble dryers for non-household use of interest to users and to describe standard methods for measuring these characteristics.
NOTE   It does not apply to transfer tumble dryers or tumble dryers with automatic loading and unloading.

Elektrische Geräte für den Hausgebrauch und ähnliche Zwecke – Verfahren zur Messung der Gebrauchseigenschaften für Wäschetrockner für den gewerblichen Gebrauch

Appareils électrodomestiques et analogues - Méthodes de mesure de l'aptitude à la fonction pour les sèche-linge à tambour à usage commercial

La présente Norme européenne est applicable aux sèche-linge à tambour destinés à être employés par des utilisateurs formés, par exemple, dans des hôtels, hôpitaux, usines, dans l'industrie légère et dans des exploitations agricoles. Elle couvre les sèche-linge à tambour déclarés pour un usage commercial dans des zones publiques et manipulés par des personnes non expertes, par exemple, dans des laveries automatiques, immeubles collectifs d'habitation et buanderies communales. La présente Norme européenne couvre les sèche-linge à tambour qui utilisent l'électricité, le gaz ou la vapeur comme source de chauffage. L'objet de la présente norme est d'énumérer et de définir les principales caractéristiques d'aptitude à la fonction des sèche-linge à tambour à usage commercial intéressant les consommateurs et de décrire des méthodes normalisées pour mesurer ces caractéristiques. NOTE La norme ne s'applique ni aux sèche-linge à tambour de transfert ni aux sèche-linge à tambour permettant uniquement le fonctionnement avec chargement et déchargement automatiques.

Gospodinjski stroji in podobne električne naprave - Metode za merjenje lastnosti sušilnih strojev za komercialno uporabo

Ta evropski standard se uporablja za sušilne stroje, ki so namenjeni usposobljenim uporabnikom, npr. v hotelih, bolnišnicah, tovarnah, lahki industriji in na kmetijah. Obravnava sušilne stroje za komercialno uporabo na javnih mestih, ki jih upravljajo nestrokovne osebe, npr. v samopostrežnih pralnicah, stanovanjskih hišah in skupnih javnih pralnicah. Ta evropski standard obravnava sušilne stroje, ki kot vir segrevanja uporabljajo električno energijo, plin ali paro.
Namen tega standarda je navesti in opredeliti glavne lastnosti delovanja sušilnih strojev za negospodinjsko uporabo ter opisati standardne metode za merjenje teh lastnosti.
OPOMBA: Ta standard se ne uporablja za prenosne sušilne stroje ali sušilne stroje s samodejnim polnjenjem in praznjenjem.

General Information

Status
Published
Public Enquiry End Date
30-Mar-2017
Publication Date
11-Sep-2018
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
29-Aug-2018
Due Date
03-Nov-2018
Completion Date
12-Sep-2018

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SLOVENSKI STANDARD
SIST EN 50594:2018
01-oktober-2018
1DGRPHãþD
SIST-TS CLC/TS 50594:2015
*RVSRGLQMVNLVWURMLLQSRGREQHHOHNWULþQHQDSUDYH0HWRGH]DPHUMHQMHODVWQRVWL
VXãLOQLKVWURMHY]DNRPHUFLDOQRXSRUDER

Household and similar electric appliances - Methods for measuring the performance of

tumble dryers intended for commercial use
Elektrische Geräte für den Hausgebrauch und ähnliche Zwecke – Verfahren zur
Messung der Gebrauchseigenschaften für Wäschetrockner für den gewerblichen
Gebrauch
Ta slovenski standard je istoveten z: EN 50594:2018
ICS:
97.060 Aparati za nego perila Laundry appliances
SIST EN 50594:2018 en,fr

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50594:2018
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SIST EN 50594:2018
EUROPEAN STANDARD EN 50594
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2018
ICS 97.060 Supersedes CLC/TS 50594:2015
English Version
Household and similar electric appliances - Methods for
measuring the performance of tumble dryers intended for
commercial use

Appareils électrodomestiques et analogues - Méthodes de Elektrische Geräte für den Hausgebrauch und ähnliche

mesure de l'aptitude à la fonction pour les sèche-linge à Zwecke - Verfahren zur Messung der

tambour à usage commercial Gebrauchseigenschaften für Wäschetrockner für den
gewerblichen Gebrauch

This European Standard was approved by CENELEC on 2018-04-23. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions 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 CENELEC member.

This European Standard exists in three official versions (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 committees 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, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50594:2018 E
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SIST EN 50594:2018
EN 50594:2018 (E)
Contents Page

European foreword ........................................................................................................................... 5

1 Scope.................................................................................................................................. 6

2 Normative references ....................................................................................................... 6

3 Terms, definitions and symbols ...................................................................................... 6

3.1 Terms and definitions .......................................................................................................... 6

3.2 List of symbols .................................................................................................................... 8

4 Requirements .................................................................................................................. 10

4.1 General.............................................................................................................................. 10

4.2 Rated capacity .................................................................................................................. 11

4.3 Dimensions ....................................................................................................................... 11

5 Test conditions, materials, equipment and instrumentation...................................... 12

5.1 General.............................................................................................................................. 12

5.2 Ambient conditions ............................................................................................................ 12

5.2.1 Electricity supply ............................................................................................................... 12

5.2.2 Water supply ..................................................................................................................... 12

5.2.3 Ambient temperature and humidity ................................................................................... 13

5.3 Test materials .................................................................................................................... 13

5.3.1 General.............................................................................................................................. 13

5.3.2 Test load ........................................................................................................................... 13

5.3.3 Detergent .......................................................................................................................... 13

5.4 Equipment ......................................................................................................................... 13

5.4.1 Equipment for normalization ............................................................................................. 13

5.4.2 Equipment for conditioning the test load ........................................................................... 14

5.4.3 Equipment for wetting the test load prior to a test ............................................................ 14

5.4.4 Equipment for measurement ............................................................................................. 14

5.5 Instrumentation and accuracy ........................................................................................... 15

6 Preparation for testing.................................................................................................... 15

6.1 General.............................................................................................................................. 15

6.2 Test specifications from manufacturers ............................................................................ 15

6.3 Installation of the tumble dryer .......................................................................................... 16

6.4 Preparation of the tumble dryer for a test series ............................................................... 16

6.5 Preparation of the tumble dryer for a test run ................................................................... 16

6.5.1 General.............................................................................................................................. 16

6.5.2 Preparation requirements for all heating alternatives except for heat pump equipped

tumble dryers .................................................................................................................... 16

6.5.3 Preparation requirements for heat pump equipped tumble dryers ................................... 16

6.6 Preparation of test loads ................................................................................................... 17

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SIST EN 50594:2018
EN 50594:2018 (E)

6.6.1 General.............................................................................................................................. 17

6.6.2 Pre-treatment of new test load items prior to use ............................................................. 17

6.6.3 Requirements regarding the age of test load items .......................................................... 17

6.6.4 Normalization of test load items ........................................................................................ 17

6.6.5 Conditioning of test load items .......................................................................................... 18

6.6.6 Test load composition ....................................................................................................... 18

6.6.7 Wetting .............................................................................................................................. 21

7 Performance measurements – General requirements ................................................ 21

8 Tests for performance .................................................................................................... 22

8.1 General.............................................................................................................................. 22

8.2 Test procedure for performance tests ............................................................................... 22

8.2.1 Test conditions, materials and preparation for testing ...................................................... 22

8.2.2 Test programme ................................................................................................................ 22

8.2.3 Test load ........................................................................................................................... 23

8.2.4 Test procedure .................................................................................................................. 23

8.2.5 Validity of a test run ........................................................................................................... 23

8.2.6 Validity of a test series ...................................................................................................... 23

8.3 Measurements to determine water and energy consumption and cycle time ................... 24

8.3.1 General.............................................................................................................................. 24

8.3.2 Procedure .......................................................................................................................... 24

8.4 Measurements to determine condensation efficiency ....................................................... 24

8.4.1 General.............................................................................................................................. 24

8.4.2 Procedure .......................................................................................................................... 24

8.5 Measurements to determine exhaust air volume .............................................................. 25

8.6 Performance measurement at maximum exhaust duct pressure ..................................... 25

8.7 Measurement of the textile drying temperature ................................................................ 25

9 Assessment of performance .......................................................................................... 25

9.1 General.............................................................................................................................. 25

9.2 Final moisture content of the load ..................................................................................... 25

9.3 Total energy ...................................................................................................................... 26

9.4 Corrected energy .............................................................................................................. 26

9.5 Corrected water consumption ........................................................................................... 27

9.6 Corrected cycle time ......................................................................................................... 27

9.7 Condensation efficiency .................................................................................................... 28

9.8 Evaporation capacity ......................................................................................................... 28

9.9 Exhaust air volume ............................................................................................................ 29

10 Data to be reported ......................................................................................................... 29

Annex A (normative) Reference list ............................................................................................. 30

Annex B (normative) Exhaust ducts for tumble dryer testing .................................................. 31

Annex C (informative) Flow diagrams ......................................................................................... 35

Annex D (normative) Test report – Data to be reported ............................................................ 36

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SIST EN 50594:2018
EN 50594:2018 (E)

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

declared ........................................................................................................................................... 40

Annex F (normative) Flexible initial moisture content method ................................................ 41

Annex G (normative) Performance testing of steam heated tumble dryers ............................ 43

Annex H (normative) Performance testing of gas heated tumble dryers ................................ 50

Annex I (informative) Measurement of exhaust air volume ...................................................... 53

Annex J (informative) Measurement of the textile drying temperature ................................... 54

Annex K (normative) Test procedure for a performance test of a cotton dry programme

with full load at standard rating conditions ................................................................................. 56

Annex L (normative) Reporting of key parameters .................................................................... 64

Bibliography .................................................................................................................................... 65

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SIST EN 50594:2018
EN 50594:2018 (E)
European foreword

This document (EN 50594:2018) 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 has (dop) 2019-04-23
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-04-23
standards conflicting with this document
have to be withdrawn
This document supersedes CLC/TS 50594:2015.
This document is based on portions of EN 61121:2013.

The procedures described in this European Standard are modified substantially compared to the procedures

described in EN 61121. Therefore, results of tests according to this European Standard cannot and are

bound not to be compared to results of similar procedures of EN 61121.
Significant technical differences from EN 61121 are:
a) test procedures for tumble dryers of any size on the market;

b) test procedure for measuring power consumption also for steam heated and gas heated tumble dryers;

c) the introduction of a new type of test load;
d) the introduction of a new initial moisture content level.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CENELEC 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.
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SIST EN 50594:2018
EN 50594:2018 (E)
1 Scope

This European Standard is applicable to tumble dryers intended to be used by trained users e.g. in hotels,

hospitals, factories, in light industry and on farms. It covers tumble dryers declared for commercial use in

public areas and operated by lay persons e.g. in launderettes, apartment houses and communal laundry

rooms. This European Standard covers tumble dryers which use electricity, gas or steam as a heating

source.

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 tumble dryers only possible to operate 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 437:2003+A1:2009, Test gases — Test pressures — Appliance categories

CEN/TR 1749:2014, European scheme for the classification of gas appliances according to the method of

evacuation of the combustion products (types)

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 for

commercial electric tumble dryers

EN 50640:2018, Clothes washing machines for commercial use — Methods for measuring the performance

EN 60456:2016, Clothes washing machines for household use — Methods for measuring the performance

(IEC 60456:2010, modified)

EN 60734, Household electrical appliances — Performance — Water for testing (IEC 60734)

EN 62053-21, Electricity metering equipment (a.c.) — Particular requirements — Part 21: Static meters for

active energy (classes 1 and 2) (IEC 62053-21)
ISO 80000-1:2009, Quantities and units — Part 1: General
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
tumble dryer

appliance in which textiles are dried by tumbling in a rotating drum, through which air is passed

3.1.2
air vented tumble dryer

tumble dryer that draws in fresh air which is passed over the textiles and where the resulting moist air is

exhausted into the room or vented outside
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SIST EN 50594:2018
EN 50594:2018 (E)
3.1.3
condenser tumble dryer

tumble dryer which includes a device for removing moisture from the air used for the drying process

3.1.4
automatic tumble dryer

tumble dryer which switches off the drying process when a certain moisture content of the load is reached

Note 1 to entry: This may include systems that use conductivity or temperature sensing.

3.1.5
non-automatic tumble dryer

tumble dryer which does not switch off the drying process when a certain moisture content of the load is

reached, usually controlled by a timer, but may also be controlled manually
3.1.6
transfer tumble dryer

tumble dryer with automatic loading and unloading via conveyors or by other means

Note 1 to entry: The loading and unloading conveyers are often located on opposite sides of the drying basket.

3.1.7
test load
textile load used for testing
3.1.8
pre-treatment

processing of a new test load prior to its first use to avoid rapid changes of characteristics during the tests

3.1.9
conditioning

bringing the test load into thermodynamic equilibrium with the defined ambient air conditions of temperature

and humidity

Note 1 to entry: The process of conditioning is not the same as ‘wetting’ which is described in 6.6.7.

3.1.10
test run
single performance assessment
3.1.11
test series

group of test runs on a tumble dryer which, collectively, are used to assess the performance of that tumble

dryer
3.1.12
operation

performance of a function that occurs during the tumble dryer drying process such as heating up, drying,

cooling, anti-creasing
3.1.13
programme

series of operations which are pre-defined within the tumble dryer and which are declared by the

manufacturer as suitable for drying certain types of textiles
3.1.14
end of cycle
when the load is accessible to the user and next programme can be started
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SIST EN 50594:2018
EN 50594:2018 (E)
3.1.15
cycle

complete drying process until the load is accessible to the user, as defined by the selected programme,

consisting of a series of operations
3.1.16
cycle time

time from the initiation of the programme (excluding any user programmed delay) until the end of the cycle

3.1.17
normalization

processing of a test load after a pre-determined number of cycles to bring the test load to a normal state

prior to testing
3.1.18
rated capacity

maximum mass in kilograms of dry textiles of a particular defined type, which the manufacturer declares can

be treated in a specific programme
3.1.19
test load mass
actual mass of the test load
3.1.20
conditioned test load mass

mass of the test load when conditioned to correct humidity and temperature defined in 5.2.3.2

3.1.21
nominal test load mass

mass of dry textiles of a particular type for which the performance of the tumble dryer will be tested (rated

capacity or part load)

Note 1 to entry: Target value toward which the conditioned test load mass will be adjusted.

3.1.22
moisture content

ratio of the difference between test load mass and the conditioned test load mass to the conditioned

test load mass expressed in percent
3.1.23
initial moisture content
moisture content of a test load prior to a test run
3.1.24
final moisture content
moisture content of a test load at the end of a test run
3.1.25
rated voltage
voltage assigned to the appliance by the manufacturer
3.2 List of symbols
The symbols are listed in Table 1.
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SIST EN 50594:2018
EN 50594:2018 (E)
Table 1 — List of symbols
Symbol Unit Definition
a - constant part of the regression line
b - slope part of the regression line
C % arithmetical average of the condensation efficiency of all valid test runs
% condensation efficiency for test run j
d Kg/l density of water

E kWh arithmetical average of the corrected energy consumption of all valid test runs

kg/min evaporation capacity
HS,n heating value referred to standard conditions
kWh/m
V 3
measured gas volume
m M
W kWh average corrected energy consumption
kWh corrected consumption for test run j
kWh measured consumption for test run j
kWh corrected electric energy consumption for test run j
kWh corrected steam energy consumption for test run j
kWh corrected gas energy consumption for test run j
kWh measured electric energy for test run j
mej
kWh measured steam energy for test run j
msj
kWh measured gas energy for test run j
mgj
Wcs kWh energy of the recovered condensate
kWh total gas energy consumption
kWh/kg specific corrected energy consumption
F 3
volumetric flow rate
v m /min
- Gas factor according to H.6.1
j test run number

L l arithmetical average of the corrected water consumption of all valid test runs

l corrected water consumption for test run j
l measured water consumption for test run j
l/kg Specific water consumption
kg mass of supplied steam to the tumble dryer during a test run
dst
n - number of test runs
p Pa static pressure
S - standard deviation of measured results

- standard deviation of the measured final moisture content for all valid test runs

T min arithmetical average of the corrected cycle time of all valid test runs
min/kg specific corrected cycle time
min corrected cycle time for test run j
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SIST EN 50594:2018
EN 50594:2018 (E)
Symbol Unit Definition
min measured cycle time for test run j
°C the condensate temperature
°C the temperature recorded by the steam temperature sensor
°C maximum drying temperature
max
°C maximum ambient temperature during a test run
amax
°C minimum ambient temperature during a test run
amin
°C average ambient temperature during a test run
amean
l clothes container volume
V exhaust air volume
M g rated capacity for the type of load tested
g mass of the conditioned test load
g mass of the test load after drying
mass of the test load after drying for test run j
g mass of the test load after wetting
M kg mass of the test load used after wetting but before drying
g mass of water collected
g mass of water collected during test run j
kg mass of the small sheet in a test load
kg mass of the large sheet in a test load
kg desired mass of the test load
i-th term of parameter x
- mean of all terms of parameter x
- number of small sheets in a test load
- number of large sheets in a test load
Y - performance parameter (energy consumption or cycle time)
μ % average measured final moisture content for a test series
% target final moisture content
% measured final moisture content after test run j
% measured initial moisture content for test run j
% nominal initial moisture content
4 Requirements
4.1 General

This European Standard does not specify minimum performance requirements for tumble dryers. This

European Standard does however set methods for the measurement of following performance parameters:

• electric energy consumption;
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SIST EN 50594:2018
EN 50594:2018 (E)
• steam energy consumption;
• gas energy consumption;
• water consumption;
• cycle time;
• condensation efficiency;
• drying temperature of the textiles;
• volumetric flow rate of exhaust air.

Any claims of performance referring to this European Standard for these parameters shall be measured in

accordance with the requirements of this European Standard. Any claims of performance referring to this

document at other than rated capacity shall be qualified with load type and capacity used for the test (refer

to Clause 7 for details).
4.2 Rated capacity

The manufacturer or supplier shall declare the rated capacity at 0,5 kg intervals

The rated capacity for any textile type shall not exceed the maximum mass of dry laundry, to be used in the

appliance in accordance with EN 50570:2013, 3.1.9.

If the rated capacity is not declared by the manufacturer, the rated capacity shall be deduced from the

clothes container volume (see 4.3) as described in Annex E.

Where the manufacturer gives a range of values for the rated capacity for a particular textile type, the

maximum value shall be used.
For different textiles the rated capacity of an appliance may be different.
4.3 Dimensions

Where a manufacturer declares dimensions, these shall be in accordance with the following requirements,

as applicable. The dimensions shall be given in mm and shall be rounded up to the nearest higher mm.

• Height = vertical dimension measured from the lower edge (on the floor) to the upper edge of the top,

with the door/lid closed: if adjustable levelling feet are provided, they shall be moved to determine

maximum possible height.

• Max height = maximum vertical dimension measured from the lower edge (on the floor) to a horizontal

plane at the maximum height of the tumble dryer with the door/lid open: if adjustable levelling feet are

provided, they shall be moved up and down to determine minimum and maximum possible heights.

• Width = horizontal dimension, between the sides, as measured between two parallel vertical planes

against the sides of the tumble dryer, including all projections.

• Depth = horizontal dimension as measured from a vertical rear plane against the tumble dryer and the

most prominent part of the front, knobs and handles not being taken into account, with the door/lid

closed, including all projections.

• Max depth = horizontal dimension as measured from a vertical rear plane against the tumble dryer

and the most prominent part of the front knobs and handles not being taken into account, with the

door/lid open (generally when at right angles to the machine front), including all projections.

• Clothes container volume = the volume of the container in which textiles are placed, where required,

shall be determined in accordance with Annex E.
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SIST EN 50594:2018
EN 50594:2018 (E)
5 Test conditions, materials, equipment and instrumentation
5.1 General

The tolerances specified for parameters within this European Standard, using the symbol ‘ ± ’, indicate the

allowable limits of variation from the specified parameter outside which the test or results shall be invalid.

...

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