IEC TS 62600-202:2022

IEC TS 62600-202 ®
Edition 1.0 2022-04
TECHNICAL
SPECIFICATION
colour
inside
Marine energy – Wave, tidal and other water current converters –
Part 202: Early stage development of tidal energy converters – Best practices
and recommended procedures for the testing of pre-prototype scale devices
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IEC TS 62600-202 ®
Edition 1.0 2022-04
TECHNICAL
SPECIFICATION
colour
inside
Marine energy – Wave, tidal and other water current converters –

Part 202: Early stage development of tidal energy converters – Best practices

and recommended procedures for the testing of pre-prototype scale devices

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.140 ISBN 978-2-8322-1095-9

– 2 – IEC TS 62600-202:2022 © IEC 2022
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Symbols and abbreviated terms . 11
5 Staged development approach . 11
5.1 General . 11
5.2 Stage 1 . 14
5.2.1 Scope . 14
5.2.2 Stage gate . 14
5.3 Stage 2 . 15
5.3.1 Scope . 15
5.3.2 Stage gate . 15
5.4 Stage 3 . 16
5.4.1 Scope . 16
5.4.2 Stage gate . 16
6 Test planning . 17
6.1 TEC similitudes . 17
6.1.1 General . 17
6.1.2 Reynolds scaling . 18
6.1.3 Temperature and salinity effects on Reynolds number . 21
6.2 Power take off (PTO) similitude . 21
6.3 Design statement . 21
6.4 Facility selection and outline plan . 23
6.4.1 General . 23
6.4.2 Stage 1 and Stage 2 . 23
6.4.3 Stage 3 . 25
6.5 Physical model considerations . 26
6.5.1 General . 26
6.5.2 Stage 1 . 26
6.5.3 Stage 2 . 27
6.5.4 Stage 3 . 27
6.5.5 Methods for applying torque . 27
6.5.6 Methods for controlling angular velocity . 28
6.6 Additional test procedures. 28
6.6.1 Dry run . 28
6.6.2 Natural frequency . 28
6.7 Uncertainties and repeat tests . 28
7 Reporting requirements . 29
7.1 Overview. 29
7.2 General . 29
7.3 Test conditions and goals . 29
7.3.1 General . 29
7.3.2 Facility selection report . 29
7.3.3 Physical model report . 30

7.3.4 Measurement procedure report . 30
7.4 Presentation of results . 30
8 Data acquisition . 31
8.1 Signal conditioning . 31
8.2 Sample rate . 32
8.3 Analogue to digital conversion and DAQ system . 32
8.4 Frequency response . 32
8.5 Data synchronization . 32
8.6 Data recording . 33
8.7 Recording of supplementary test data . 33
8.8 Calibration factors/Physical units . 33
8.9 Instrument response functions . 33
8.10 Health monitoring and verification of signals . 33
8.11 Special data acquisition requirements for Stage 3 open ocean trials . 34
9 Testing environment characterization . 34
9.1 General . 34
9.2 Environmental measurements . 34
9.3 Inflow/ Onset velocity . 35
9.3.1 General . 35
9.3.2 Inferred inflow velocity . 36
9.3.3 Point measurement . 36
9.4 Velocity shear profile . 36
9.4.1 General . 36
9.4.2 Measuring a velocity shear profile. 36
9.4.3 Presenting velocity shear profile . 37
9.5 Wave climate . 37
9.5.1 General . 37
9.5.2 Measuring waves . 38
9.6 Turbulence . 38
9.6.1 General . 38
9.6.2 Turbulence intensity . 38
9.6.3 Integral length and time scales . 39
9.6.4 Other considerations . 39
9.7 Temperature, salinity, density and viscosity . 39
10 Turbine rotor performance characterization . 39
10.1 Testing goals . 39
10.2 Performance indicators . 40
10.2.1 General . 40
10.2.2 Power, torque and angular velocity . 40
10.2.3 Turbine rotor drag (thrust) . 40
10.3 Non-dimensional performance indicators . 40
10.3.1 General . 40
10.3.2 Torque performance characterization . 40
10.3.3 Power performance characterization . 40
10.3.4 Thrust performance characterization . 41
10.3.5 Presentation of non-dimensional results . 41
11 Motions and loads under operational conditions . 41
11.1 Testing goals
...