Design of A 100 GWh Wave Energy Plant

V. Jayashankar
IIT Madras, Chennai, India

K. Mala
IIT Madras, Chennai, India

S. Kedarnath
IIT Madras, Chennai, India

J. Jayaraj
IIT Madras, Chennai, India

U. Omezhilan
Kings College of Engg., Pudukottai, India

V. Krishna
Kings College of Engg., Pudukottai, India

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp110572167

Ingår i: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden

Linköping Electronic Conference Proceedings 57:4, s. 2167-2174

Visa mer +

Publicerad: 2011-11-03

ISBN: 978-91-7393-070-3

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


The near shore Oscillating Water Column (OWC) based wave energy plant shows enormous promise for the commercialization of wave energy. The design details of such a plant; with an average incident energy of 24 kW/m and capable of producing 100 GWh over a two year period are described. The caisson; which could be a part of a breakwater; is constructed in a modular fashion in widths of 20 m. The power module is built around a 4.5 m diameter twin unidirectional impulse turbine with a rating of 900 kW. A key feature of the design is to combine the output from several OWCs into a single power module. Simulations show that the efficiency of the turbine can exceed 60 % from 10 to 100 % of the rated power. It is shown that a breakwater length of about 660 m with 11 such turbine generators is sufficient to meet the design requirement; with an overall wave to wire efficiency of about 36 %. The power electronics interface to the grid could be implemented with doubly fed induction generators or variable speed synchronous generators directly obtainable from the wind power industry. Laboratory experiments on a model turbine are used to validate the main claims.


OWC; twin unidirectional turbine topology; doubly fed induction machine


[1] Ohno H.; Funakoshi T.; Saito K.; Oikawa K.; and Takahashi S.; Interim report on the Second Stage of Field Experiments on a Wave Power Extracting Caisson In Sakata Port; ODEC; 1993; pp. 173-182.

[2] Ravindran M.; Jayashankar V.; Jalihal P. and Pathak A.G.; The Indian Wave Energy Program – an overview; Teri Information Digest on Energy 7(3); 1997; pp.173-188.

[3] Heath; T.; Whittaker; T.J.T and Boake; C.B.; The design; construction and operation of the LIMPET wave energy converter; Proceedings of the 4th European Wave Energy Conference; 2000; pp. 49-55.

[4] Le Crom; Brito-Melo A.;Neumann F.; Sarmento A.J.N.A.; Portuguese grid connected OWC power plant: Monitoring Report; Proceedings of the 20th International Offshore and Polar Engineering Conference; 2010.

[5] Marine Energy Challenge: Oscillating Water Column wave energy converter evaluation report; © The Carbon Trust; 2005.

[6] The Saltire prize challenge. Available online: http://www.scotland.gov.uk/Topics/Business-Industry/Energy/Action/leading/saltire-prize; April 1; 2003 [accessed13.09.09].

[7] Takao M.; Setoguchi T.; Kaneko K.; Kim TH; Maeda H. and Inoue M.; Impulse turbine for Wave power conversion with Air flow rectification system; International Journal of Offshore and Polar Engineering 12(2); 2002; pp.142 – 146.

[8] Jayashankar V.; Anand S.; Geetha T et al.; A twin unidirectional topology for OWC based wave energy plants; Renewable Energy 34; 2009; pp. 692-698. doi: 10.1016/j.renene.2008.05.028.

[9] Mala K.; Jayaraj J.; Jayashankar V. et al.; A twin unidirectional impulse turbine topology for OWC based wave energy plants - Experimental validation and scaling; Renewable Energy 36; 2011; pp. 307-314. doi: 10.1016/j.renene.2010.06.043.

[10] Anand S; Jayashankar V; Nagata S; Toyota K; Takao M; Setoguchi T.; Performance estimation of bi-directional turbines for wave energy plants; International Journal of Thermal Science 15(4); 2007; pp.346 -52.

[11] Michalke G.; “Benefits for the development of wave and tidal energy conversion from the lessons learned in wind energy”; 3rd International Conference on Ocean Energy; 2010.

[12] Ion Boldea; Variable speed generators; CRC press; 2006; pp.1-16.

Citeringar i Crossref