Tank test related instrumentation and best practice
| Type | Technical document (specification, manual) | ||||||||
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| Date | 2014 | ||||||||
| Language | English | ||||||||
| Ref. | Deliverable 4.01EC | ||||||||
| Other localization | http://www.fp7-marinet.eu/public/docs/D4.01%20Tank%20test%20related%20instumentation%20and%20best%20practice.pdf | ||||||||
| Author(s) | Ohana Jeremy 1, Bourdier Sylvain2 |
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| Affiliation(s) | 1 : IFREMER, France 2 : ECN, France |
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| Version | Final | ||||||||
| Note | WP4: Research to Innovate and Improve Infrastructures, Technologies and Techniques | ||||||||
| Abstract | Marine energy devices are still at development stage and many models are being tested in the different hydrodynamics facilities. Improving the measurements quality of these tests by exchanging between the technical staff of the Marinet partners is one of the Work Package 4 objectives. This report is an experience feedback from Marinet tests. It was written mostly from Ifremer experience and aim to present the instrumentation techniques needed to carry out quality tank testing. The first part reviews the typical physical parameters to be measured, gives a short description of the sensors working principle and examples of implementations. The flow measurement section starts with wind measurement and a comparison of advantages and drawbacks of different kinds of anemometers. About wave measurements, the description of the Ifremer wave gauge completes the Marinet deliverable 2.1 database. Then capacitive gauges for measuring water elevation inside the model are introduced. Afterwards the use of load cell to measure tensions in mooring lines is explained and illustrated by different Marinet project setups. Finally the motion measurements by video motion tracking are described and associated recommendations are suggested. The second part deals with the acquisition system to record the signals from the sensors. Different configurations including adding an embedded acquisition system in the model are detailed. Synchronization issues come up with the use of several acquisitions system and are discussed here. The third part covers the measurement uncertainty assessment. The measurement errors are calculated from the static calibration procedure. Next, the necessity of dynamic calibrations is exposed with the associated procedure and analysis.The last chapter shows examples of generating techniques energy resources at model scale. The Ifremer wind generator with variable wind speed capabilities and some results of its characterization campaign are presented. |
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