IEC TS 62862-3-3:2020
(Main)Solar thermal electric plants - Part 3-3: Systems and components - General requirements and test methods for solar receivers
Solar thermal electric plants - Part 3-3: Systems and components - General requirements and test methods for solar receivers
IEC TS 62862-3-3:2020 specifies the technical requirements, tests, durability and technical performance parameters of solar thermal receivers for absorbing concentrated solar radiation and transferring the heat to a fluid used in concentrated solar thermal power plants with linear-focus solar collectors. The receivers addressed consist of an absorber tube and an insulating glass envelope tube.
This document includes the definitions of technical properties and characterization of geometry and performance parameters as well as the test methods for optical characterization, heat loss, and durability. For the sake of clarity, it is stated here that the thermal loss tests described in this document do not deliver the thermal loss of the receiver tubes when they are installed in commercial solar fields.
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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
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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
...
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