Comparison of heaving buoy and oscillating flap wave energy converters

Mohd Aftar Abu Bakar, David A. Green, Andrew V. Metcalfe, G. Najafian

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Waves offer an attractive source of renewable energy, with relatively low environmental impact, for communities reasonably close to the sea. Two types of simple wave energy converters (WEC), the heaving buoy WEC and the oscillating flap WEC, are studied. Both WECs are considered as simple energy converters because they can be modelled, to a first approximation, as single degree of freedom linear dynamic systems. In this study, we estimate the response of both WECs to typical wave inputs; wave height for the buoy and corresponding wave surge for the flap, using spectral methods. A nonlinear model of the oscillating flap WEC that includes the drag force, modelled by the Morison equation is also considered. The response to a surge input is estimated by discrete time simulation (DTS), using central difference approximations to derivatives. This is compared with the response of the linear model obtained by DTS and also validated using the spectral method. Bendat's nonlinear system identification (BNLSI) technique was used to analyze the nonlinear dynamic system since the spectral analysis was only suitable for linear dynamic system. The effects of including the nonlinear term are quantified.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages86-101
Number of pages16
Volume1522
DOIs
Publication statusPublished - 2013
Event20th National Symposium on Mathematical Sciences - Research in Mathematical Sciences: A Catalyst for Creativity and Innovation, SKSM 2012 - Putrajaya
Duration: 18 Dec 201220 Dec 2012

Other

Other20th National Symposium on Mathematical Sciences - Research in Mathematical Sciences: A Catalyst for Creativity and Innovation, SKSM 2012
CityPutrajaya
Period18/12/1220/12/12

Fingerprint

heaving
direct power generators
spectral methods
renewable energy
system identification
nonlinear systems
approximation
drag
spectrum analysis
simulation
degrees of freedom

Keywords

  • Dynamic systems
  • Spectral method
  • Wave energy converters

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Abu Bakar, M. A., Green, D. A., Metcalfe, A. V., & Najafian, G. (2013). Comparison of heaving buoy and oscillating flap wave energy converters. In AIP Conference Proceedings (Vol. 1522, pp. 86-101) https://doi.org/10.1063/1.4801109

Comparison of heaving buoy and oscillating flap wave energy converters. / Abu Bakar, Mohd Aftar; Green, David A.; Metcalfe, Andrew V.; Najafian, G.

AIP Conference Proceedings. Vol. 1522 2013. p. 86-101.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abu Bakar, MA, Green, DA, Metcalfe, AV & Najafian, G 2013, Comparison of heaving buoy and oscillating flap wave energy converters. in AIP Conference Proceedings. vol. 1522, pp. 86-101, 20th National Symposium on Mathematical Sciences - Research in Mathematical Sciences: A Catalyst for Creativity and Innovation, SKSM 2012, Putrajaya, 18/12/12. https://doi.org/10.1063/1.4801109
Abu Bakar MA, Green DA, Metcalfe AV, Najafian G. Comparison of heaving buoy and oscillating flap wave energy converters. In AIP Conference Proceedings. Vol. 1522. 2013. p. 86-101 https://doi.org/10.1063/1.4801109
Abu Bakar, Mohd Aftar ; Green, David A. ; Metcalfe, Andrew V. ; Najafian, G. / Comparison of heaving buoy and oscillating flap wave energy converters. AIP Conference Proceedings. Vol. 1522 2013. pp. 86-101
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