Wavepod a transmission for wave energy converters – set-up and testing

Authors

  • Dominic Dießel Institute for Fluid Power Drives and Controls (IFAS), RWTH Aachen University, Steinbachstraße 53, 52074 Aachen, Germany
  • Garth Bryans Aquamarine Power, Elder House, 24 Elder Street, Edinburgh EH1 3DX, UK
  • Louis Verdegem Bosch Rexroth, 15 Cromwell Rd., St. Neots, Cambridgeshire PE19 2ES, UK
  • Hubertus Murrenhoff Institute for Fluid Power Drives and Controls (IFAS), RWTH Aachen University, Steinbachstraße 53, 52074 Aachen, Germany

DOI:

https://doi.org/10.1080/14399776.2015.1055990

Keywords:

WavePOD, wave energy, power take off (PTO), hydraulic transmission, test-rig, wave energy converter (WEC), concept study

Abstract

Marine wave energy is expected to play a significant role in future energy production. A range of converter types has been proposed, some of which have been tested, but none have achieved economic feasibility yet. Partly this is due to transmissions, which are too expensive, not reliable enough or too poor in terms of efficiency. A new system has been developed by a consortium consisting of Bosch Rexroth, Aquamarine Power and the Institute for Fluid Power Drives and Controls (IFAS) of RWTH Aachen University. The consortium aims to solve these problems by developing an offthe- shelf standardised hydraulic transmission or power-take-off. It is called WavePOD. WavePOD provides improved flexibility for adjusting to different wave conditions without requiring customised components or fast control response times. An 8% scaled power test rig was built and commissioned for operation at IFAS in November 2014. In the first step multiple tests will be carried out to show proof of concept, efficiency and reliability until end of March 2015. In this paper basic criteria for the design of WavePOD will be explained, leading to an explanation of the system. The test rig will then be presented together with intended tests and first results.

Downloads

Download data is not yet available.

Author Biographies

Dominic Dießel, Institute for Fluid Power Drives and Controls (IFAS), RWTH Aachen University, Steinbachstraße 53, 52074 Aachen, Germany

Dominic Dießel has studied Mechanical Engineering at RWTH Aachen University. Since 2012 he is member of the scientific staff at the Institute for Fluid Power Drives and Controls (IFAS) at RWTH Aachen University.

Garth Bryans, Aquamarine Power, Elder House, 24 Elder Street, Edinburgh EH1 3DX, UK

Garth Bryans has over 10 years experience in the marine renewables sector and has held a number of senior technical roles. He holds a PhD from Queen’s University, Belfast and University College Dublin. He also holds an MSc in Applied Physical Oceanography and a BSc in Marine Biology and Oceanography, both from the University of Wales.

Louis Verdegem, Bosch Rexroth, 15 Cromwell Rd., St. Neots, Cambridgeshire PE19 2ES, UK

Louis Verdegem has over 36 years of Hydraulics Engineering experience. The last 10 years working to supply the Wave and Tidal industry in design and development of Power Take Off Systems globally. He has worked for the previous 16 years on Military Bridging Systems. He has a BSc.(hons) in Aeronautics and Astronautics from Southampton University and is a Fellow of the Institute of Mechanical Engineers.

Hubertus Murrenhoff, Institute for Fluid Power Drives and Controls (IFAS), RWTH Aachen University, Steinbachstraße 53, 52074 Aachen, Germany

Hubertus Murrenhoff is director of the Institute for Fluid Power Drives & Controls (IFAS) at RWTH Aachen University. Main research interests cover hydraulics and pneumatics including components, systems, controls, simulation programs and the applications of fluid power in mobile and stationary equipment.

References

Berndt, H., et al., 2007. TransmissionCode 2007 Netz- und

Systemregeln der deutschen Übertragungsnetzbetreiber

[Transmissioncode 2007 network and system rules of the

German transmission system operators]. Berlin: Verband

der Netzbetreiber VDN e.V. beim VDEW.

Dießel, D., et al., 2014. Analysis of characteristics for transmissions

in oscillating marine wave energy converters. 9th international

fluid power conference (9. IFK), Aachen, Germany.

Graw, K.-U., 1995. Wellenenergie – eine hydrodynamische

Analyse [Wave energy - a hydrodynamic analysis]. Habilitation

thesis. Bergische Universität Wuppertal, Germany.

Hansen, R., et al., 2013. Discrete displacement hydraulic power

take-off system for the wavestar wave energy converter.

th international fluid power conference (8. IFK), Dresden,

Germany.

Kamizuru, Y., 2014. Development of hydrostatic drive trains

for wave energy converters. Thesis (PhD). RWTH Aachen

University, Germany.

Murrenhoff, H., 2012. Grundlagen der Fluidtechnik [Fundamentals

of fluid power]. Aachen: Shaker Verlag GmbH.

Murrenhoff, H., et al., 2013. Hydraulic concepts for energy

saving and energy production. 8th international conference

on fluid power transmission and control (ICFP 2013),

Hangzhou, China.

O`Sullivan, D., et al., 2009. Challenges in the grid connection

of wave energy devices. 8th European wave and tidal

energy conference, Uppsala, Sweden.

Plummer, A., et al., 2012. Power transmission for wave energy

converters: a review. 8th international fluid power conference

(8. IFK), Dresden, Germany.

Schlemmer, K., et al., 2012. Hydraulic power take-off design

for an axi-symmetric heaving point absorber. 8th international

fluid power conference (8. IFK), Dresden, Germany.

D. Dießel et al.

Downloads

Published

2018-12-28

Issue

Section

Original Article

Most read articles by the same author(s)

1 2 > >>