EN ISO 24194:2022

SLOVENSKI STANDARD
01-september-2022
Sončna energija - Polja sprejemnikov sončne energije - Preverjanje zmogljivosti
(ISO 24194:2022)
Solar energy - Collector fields - Check of performance (ISO 24194:2022)
Sonnenenergie - Kollektorfelder - Überprüfung der Leistungsfähigkeit (ISO 24194:2022)
Energie solaire - Champs de capteurs - Vérification de la performance (ISO 24194:2022)
Ta slovenski standard je istoveten z: EN ISO 24194:2022
ICS:
27.160 Sončna energija Solar energy engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 24194
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2022
EUROPÄISCHE NORM
ICS 27.160
English Version
Solar energy - Collector fields - Check of performance (ISO
24194:2022)
Energie solaire - Champs de capteurs - Vérification de Sonnenenergie - Kollektorfelder - Überprüfung der
la performance (ISO 24194:2022) Leistungsfähigkeit (ISO 24194:2022)
This European Standard was approved by CEN on 25 May 2022.

CEN 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 CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 24194:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 24194:2022) has been prepared by Technical Committee ISO/TC 180 "Solar
energy" in collaboration with Technical Committee CEN/TC 312 “Thermal solar systems and
components” the secretariat of which is held by NQIS/ELOT.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by December 2022, and conflicting national standards
shall be withdrawn at the latest by December 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 24194:2022 has been approved by CEN as EN ISO 24194:2022 without any modification.

INTERNATIONAL ISO
STANDARD 24194
First edition
2022-05
Solar energy — Collector fields —
Check of performance
Energie solaire — Champs de capteurs — Vérification de la
performance
Reference number
ISO 24194:2022(E)
ISO 24194:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
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Phone: +41 22 749 01 11
Email: copyright@iso.org
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Published in Switzerland
ii
ISO 24194:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 1
5 Procedure for checking the power performance of solar thermal collector fields .5
5.1 Stating an estimate for the thermal power output of a collector field . 5
5.2 Calculating power output. 5
5.2.1 General . 5
5.2.2 Non-concentrating collectors — Formula (1) . 6
5.2.3 Non- or low-focussing collectors — Formula (2) . 7
5.2.4 Focussing collectors with high concentration ratio — Formula (3) . 7
5.3 Stating a performance estimate . 7
5.4 Restrictions on operating conditions . 7
5.5 Shadows . 8
5.5.1 Shadows on fixed collectors in rows . 8
5.5.2 Shadows on one-axis tracking collectors in row . 9
5.6 Collector incidence angle . 11
5.7 Example of setting up an equation for calculating performance estimate. 11
5.8 Determination of potential valid periods .12
5.9 Checking collector field power performance .12
6 Procedure for checking the daily yield of solar thermal collector fields .14
6.1 Stating an estimate for the daily yield of a collector field . 14
6.2 Calculating daily energy yield . . 14
6.2.1 General . 14
6.2.2 Non-tracking and non-concentrating collectors — Formula (20) .15
6.3 Stating a performance estimate . 15
6.4 Restrictions on operating conditions . 16
6.5 Shadows . 16
6.6 Collector incidence angle . 16
6.7 Example of setting up an equation for calculating performance estimate. 16
6.8 Determination of potential valid periods . 17
6.9 Checking collector field daily yield performance . 18
7 Measurements needed.18
7.1 General . 18
7.2 Requirements on measurements and sensors . 20
7.2.1 Accuracy . 20
7.2.2 Time . 21
7.2.3 Solar radiation measurement . 22
7.2.4 Temperature measurements . 23
7.2.5 Flow rate measurement . 24
7.2.6 Power measurement/calculation . 24
7.2.7 Measurement of wind speed . 24
7.3 Valid data records . 24
Annex A (informative) Recommended reporting format — Power method .26
Annex B (informative) Recommended reporting format — Daily yield method.29
Bibliography .30
iii
ISO 24194:2022(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures use
...