IEC TS 62862-3-3:2020

IEC TS 62862-3-3 ®
Edition 1.0 2020-02
TECHNICAL
SPECIFICATION
colour
inside
Solar thermal electric plants –
Part 3-3: Systems and components – General requirements and test methods
for solar receivers
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IEC TS 62862-3-3 ®
Edition 1.0 2020-02
TECHNICAL
SPECIFICATION
colour
inside
Solar thermal electric plants –

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

for solar receivers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-7784-3

– 2 – IEC TS 62862-3-3:2020 © IEC 2020
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions, symbols and units . 9
4 Performance test of the receiver . 9
4.1 General . 9
4.2 Identification and geometry . 9
4.3 Manufacturer's instructions . 9
4.4 Calibration of testing instrumentation . 9
4.5 Heat loss test . 9
4.5.1 General . 9
4.5.2 Objective . 10
4.5.3 Receiver tube setup and location . 10
4.5.4 Inspection . 11
4.5.5 Test methodology – Resistance heating method . 11
4.5.6 Test methodology – Joule effect method . 15
4.5.7 Thermal emittance (optional) . 21
4.5.8 Heat loss and emittance curve models . 22
4.5.9 Test report . 24
4.6 Optical characterization test . 24
4.6.1 General . 24
4.6.2 Objective . 24
4.6.3 Method of non-destructive optical characterization (optional) . 27
4.6.4 Optical efficiency test – A transient method (optional) . 28
4.6.5 Optical efficiency test (optional) . 31
4.7 Durability tests for the receiver . 34
4.7.1 General . 34
4.7.2 Antireflective glass envelope coating durability tests . 34
4.7.3 Impact resistance test (optional) . 37
4.7.4 External and/or internal thermal shock test . 40
4.7.5 Thermal stability test of absorber selective coatings for full receiver
tube . 40
4.7.6 Thermal stability of selective absorber coatings for coated stainless-
steel samples . 41
4.7.7 Thermal cycling test . 43
4.7.8 Bellows test . 44
Annex A (informative) Test report form . 48
A.1 Description of receiver tube (supplied by the manufacturer) . 48
A.1.1 General specifications . 48
A.1.2 Size and construction parameters of the receiver tube tested . 48
A.1.3 Optical and thermal parameters (nominal temperature) . 48
A.1.4 Operating parameters . 48
A.1.5 Interfaces . 49
A.2 Test results – Heat loss . 49
A.2.1 Details of test SETUP . 49
A.2.2 Heat loss test . 49

A.2.3 Linear fit of heat loss results to absorber temperature . 50
A.2.4 Linear fit of emittance data to absorber temperature . 50
A.3 Test results, optical characterization test . 50
A.4 Test results, optical efficiency test . 51
A.4.1 General . 51
A.4.2 Details of test SETUP . 51
A.4.3 Solar simulator test (if relevant, depending on test method) . 51
A.5 Test results – Stationary abrasion resistance test . 51
A.5.1 Test conditions . 51
A.5.2 Results . 51
A.6 Test results – Condensation test . 51
A.7 Test results – Impact resistance test: Method 1 – Ice balls . 52
A.7.1 Test conditions . 52
A.7.2 Procedure . 52
A.7.3 Test results. 52
A.8 Test results – Impact resistance test: Method 2 – Steel balls . 52
A.8.1 Test conditions . 52
A.8.2 Procedure . 52
A.8.3 Test results. 52
A.9 Test results – Thermal stability test of absorber selective coating for full
receiver tube . 52
A.9.1 Test conditions . 52
A.9.2 Test results. 52
A.10 Test results – Thermal stability test of absorber selective coated stainless-
steel samples . 53
A.10.1 Instrumentation . 53
A.10.2 Test conditions . 53
A.10.3 Test results. 53
A.11 Test results – Thermal cycling test . 53
A.11.1 Test conditions . 53
A.11.2 Test results. 53
A.12 Test results – Bellows test . 53
A.12.1 Test conditions . 53
A.12.2 Test results. 53
Annex B (informative) Application notes: Temperature measurement in heat-loss test

with cartridge heater – Temperature measurement offset correction . 54
Bibliography . 55

Figure 1 – Solar receiver schematic sketch . 7
Figure 2 – Resistance heating method schematic sketch . 16
Figure 3 – Test bench for heat loss measurements of solar receiver tubes . 18
Figure 4 – Position of thermocouples and sections of voltage measurement . 19
Figure 5 – Example heat loss curve . 23
Figure 6 – Measurement principle . 27
Figure 7 – Test bench for optical efficiency – Transient method . 29
Figure 8 – Schematic of abrasion equipment . 35
Figure 9 – Drawing of receiver rotation in abrasion equipment for a tube or piece . 35
Figure 10 – Example of a test bench for testing bellows fatigue . 45

– 4 – IEC TS 62862-3-3:2020 © IEC 2020

Table 1 – Evaluation periods . 12
Table 2 – Stability requirements . 12
Table 3 – Evaluation periods . 19
Table
...