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PD IEC TS 62600-202:2022 Marine energy. Wave, tidal and other water current converters - Early stage development of tidal energy converters. Best practices and recommended procedures for the testing of pre-prototype scale devices, 2022
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- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Symbols and abbreviated terms
- 5 Staged development approach [Go to Page]
- 5.1 General
- Tables [Go to Page]
- Table 1 – Staged development approach
- 5.2 Stage 1 [Go to Page]
- 5.2.1 Scope
- 5.2.2 Stage gate
- 5.3 Stage 2 [Go to Page]
- 5.3.1 Scope
- 5.3.2 Stage gate
- 5.4 Stage 3 [Go to Page]
- 5.4.1 Scope
- 5.4.2 Stage gate
- 6 Test planning [Go to Page]
- 6.1 TEC similitudes [Go to Page]
- 6.1.1 General
- 6.1.2 Reynolds scaling
- Table 2 – Scaling considerations
- Figures [Go to Page]
- Figure 1 – Power and drag (thrust) coefficients for the US Department of Energy’s Reference Model vertical-axis cross-flow turbine (RM2) tested in a towing tank (Bachant et al. 2016)
- Figure 2 – Effect of Reynolds number on performance – Power (left) and thrust (right) coefficient for reference model RM2 at λ = 3,1 plotted versus turbine diameter and approximate average turbine blade root chord Reynolds number (Bachant et al. 2016)
- Figure 3 – Effect of Reynolds number on performance – Power coefficient versus tip speed ratio (left) and power coefficient at λ = 1,9 plotted versus turbine diameter and approximate average turbine blade root chord Reynolds number (right), both for UNH-RVAT turbine (Bachant and Wosnik 2016) [Go to Page]
- 6.1.3 Temperature and salinity effects on Reynolds number
- 6.2 Power take off (PTO) similitude
- 6.3 Design statement
- 6.4 Facility selection and outline plan [Go to Page]
- 6.4.1 General
- 6.4.2 Stage 1 and Stage 2
- 6.4.3 Stage 3
- 6.5 Physical model considerations [Go to Page]
- 6.5.1 General
- 6.5.2 Stage 1
- 6.5.3 Stage 2
- 6.5.4 Stage 3
- 6.5.5 Methods for applying torque
- 6.5.6 Methods for controlling angular velocity
- 6.6 Additional test procedures [Go to Page]
- 6.6.1 Dry run
- 6.6.2 Natural frequency
- 6.7 Uncertainties and repeat tests
- 7 Reporting requirements [Go to Page]
- 7.1 Overview
- 7.2 General
- 7.3 Test conditions and goals [Go to Page]
- 7.3.1 General
- 7.3.2 Facility selection report
- 7.3.3 Physical model report
- 7.3.4 Measurement procedure report
- 7.4 Presentation of results
- 8 Data acquisition [Go to Page]
- 8.1 Signal conditioning
- Table 3 – Presentation of continuously measured indicators
- Table 4 – Presentation of discrete measured indicators
- 8.2 Sample rate
- 8.3 Analogue to digital conversion and DAQ system
- 8.4 Frequency response
- 8.5 Data synchronization
- 8.6 Data recording
- 8.7 Recording of supplementary test data
- 8.8 Calibration factors/Physical units
- 8.9 Instrument response functions
- 8.10 Health monitoring and verification of signals
- 8.11 Special data acquisition requirements for Stage 3 open ocean trials
- 9 Testing environment characterization [Go to Page]
- 9.1 General
- 9.2 Environmental measurements
- 9.3 Inflow/ Onset velocity [Go to Page]
- 9.3.1 General
- Table 5 – Environmental measurements [Go to Page]
- 9.3.2 Inferred inflow velocity
- 9.3.3 Point measurement
- 9.4 Velocity shear profile [Go to Page]
- 9.4.1 General
- 9.4.2 Measuring a velocity shear profile
- 9.4.3 Presenting velocity shear profile
- 9.5 Wave climate [Go to Page]
- 9.5.1 General
- Table 6 – Instruments suitability for velocity profiling [Go to Page]
- 9.5.2 Measuring waves
- 9.6 Turbulence [Go to Page]
- 9.6.1 General
- 9.6.2 Turbulence intensity
- Table 7 – Environmental performance indicators [Go to Page]
- 9.6.3 Integral length and time scales
- 9.6.4 Other considerations
- 9.7 Temperature, salinity, density and viscosity
- 10 Turbine rotor performance characterization [Go to Page]
- 10.1 Testing goals
- 10.2 Performance indicators [Go to Page]
- 10.2.1 General
- 10.2.2 Power, torque and angular velocity
- 10.2.3 Turbine rotor drag (thrust)
- 10.3 Non-dimensional performance indicators [Go to Page]
- 10.3.1 General
- 10.3.2 Torque performance characterization
- 10.3.3 Power performance characterization
- 10.3.4 Thrust performance characterization
- 10.3.5 Presentation of non-dimensional results
- 11 Motions and loads under operational conditions [Go to Page]
- 11.1 Testing goals
- 11.2 Testing similitude
- 11.3 Platform motions
- Table 8 – Geometric similitude requirements (operational environments)
- Table 9 – Structural similitude requirements (operational environments)
- 11.4 Local loads, cross-sectional loads and mooring or global loads
- Table 10 – Kinematic signal measurements (operational environments)
- 11.5 Test conditions [Go to Page]
- 11.5.1 Stage 1 and 2
- Table 11 – Dynamic signal measurements (operational environments) [Go to Page]
- 11.5.2 Stage 3
- 11.5.3 Fatigue measures
- 12 Motions and loads under survival conditions [Go to Page]
- 12.1 Testing goals
- Table 12 – Current parameters for kinematics and dynamics testing (operational conditions)
- 12.2 Testing similitude
- Table 13 – Geometric similitude requirements (survival environments)
- 12.3 Signal measurements
- 12.4 Environmental Input parameters [Go to Page]
- 12.4.1 General
- 12.4.2 Stage 1 and 2
- Table 14 – Structural similitude requirements (survival environments) [Go to Page]
- 12.4.3 Stage 3
- 12.5 Performance indicators
- 13 Testing of arrays
- Annex A (informative)Stage gates [Go to Page]
- A.1 General
- A.2 Design statements
- A.3 Stage gate criteria
- A.4 Uncertainty factors
- A.5 Third party review
- Annex B (informative)Device type [Go to Page]
- B.1 General
- B.2 Axial flow turbines
- B.3 Cross-flow turbines
- B.4 Hydrofoil devices
- B.5 Other [Go to Page]
- B.5.1 Ducted devices
- B.5.2 Oscillating devices
- B.5.3 Underwater kites
- Annex C (informative)Facilities selection [Go to Page]
- C.1 General
- C.2 Towing tank
- C.3 Re-circulating water channel/flume
- Table C.1 – Pros and cons of testing in towing tanks
- C.4 Open water push test
- C.5 Tidal test site
- Table C.2 – Pros and cons of testing in recirculating water channels/flumes
- Table C.3 – Pros and cons of open water push tests
- C.6 Cavitation tunnel
- C.7 Other facilities [Go to Page]
- C.7.1 General
- C.7.2 Other specialized basins and tanks
- C.7.3 Wind tunnel
- C.7.4 Rotating arm facility
- C.8 Facilities comparison
- Table C.4 – Pros and cons of testing at tidal test sites
- Table C.5 – Comparison of facilities
- Annex D (informative)Instruments [Go to Page]
- D.1 General
- D.2 Flow characteristics [Go to Page]
- D.2.1 General
- D.2.2 Acoustic techniques
- D.2.3 Optical techniques
- D.2.4 Other techniques
- D.3 Wave measurement
- D.4 Structural characteristics
- D.5 Measurement and control of turbine shaft angular velocity
- D.6 Measuring torque
- D.7 Measuring thrust
- D.8 Mooring force measurement
- D.9 Model motion [Go to Page]
- D.9.1 Optical multi camera six degree of freedom measurement system
- D.9.2 Gyroscope, accelerometer, compass, GPS
- Bibliography [Go to Page]
