IEC 62862-3-2:2018

IEC 62862-3-2 ®
Edition 1.0 2018-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Solar thermal electric plants –
Part 3-2: Systems and components – General requirements and test methods for
large-size parabolic-trough collectors

Centrales électriques solaires thermodynamiques –
Partie 3-2: Systèmes et composants – Exigences générales et méthodes d'essai
des capteurs cylindro-paraboliques de grande taille

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IEC 62862-3-2 ®
Edition 1.0 2018-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Solar thermal electric plants –

Part 3-2: Systems and components – General requirements and test methods for

large-size parabolic-trough collectors

Centrales électriques solaires thermodynamiques –

Partie 3-2: Systèmes et composants – Exigences générales et méthodes d'essai

des capteurs cylindro-paraboliques de grande taille

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-5790-6

– 2 – IEC 62862-3-2:2018 © IEC 2018
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and symbols. 6
3.1 Terms and definitions . 6
3.2 Symbols . 7
4 Test requirements . 7
5 Instrumentation . 7
5.1 Solar radiation measurement . 7
5.2 Flow rate measurement . 7
5.3 Temperature measurements . 7
5.4 Wind speed measurement . 7
5.5 Data acquisition . 8
5.6 Tracking accuracy measurement . 8
6 Test procedure . 8
6.1 Sample description . 8
6.2 Test equipment (installation/mounting/cleanliness) . 8
6.2.1 Performance test . 8
6.2.2 Tracking error test . 10
6.3 Measurement procedure . 10
6.3.1 Performance test . 10
6.3.2 Tracking error test . 10
6.4 Calculation and test results . 11
6.4.1 General . 11
6.4.2 Useful power . 11
6.4.3 Incidence angle modifier (IAM) . 12
6.4.4 Validation performance test . 12
6.4.5 Tracking error test . 13
6.4.6 Uncertainty estimation . 14
7 Reporting format . 14
Annex A (informative) Parabolic-trough collector description/requirements . 15
A.1 General description . 15
A.1.1 General . 15
A.1.2 Bearing structure . 16
A.1.3 Drive pylon . 16
A.1.4 Middle, end and shared pylon . 16
A.1.5 Reflectors . 16
A.1.6 Receiver tube . 16
A.1.7 Tracking system . 17
A.2 Operation modes . 17
Annex B (normative) Documentation to be supplied by the collector manufacturer . 18
Annex C (normative) Test report . 21
C.1 General . 21
C.2 Collector characteristics . 21

C.3 Parabolic-trough collector limitations. 22
C.4 Description of the experimental setup . 22
C.5 Results . 22
Bibliography . 24

Figure 1 – Test equipment installation. 9
Figure 2 – Structure sketch of one module of parabolic-trough collector – Gross
aperture area definition . 12
Figure A.1 – General view of a parabolic-trough collector . 15

Table C.1 – Alternate tracking accuracy reporting template . 22

– 4 – IEC 62862-3-2:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SOLAR THERMAL ELECTRIC PLANTS –

Part 3-2: Systems and components – General requirements and
test methods for large-size parabolic-trough collectors

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,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decis
...