A harmonic pressure differential wave energy converter. (September 2017)

• Record Type: Journal Article
• Authors: Schönborn, Alessandro
• Is Part Of: International journal of marine energy. Volume 19(2017)
• Page Start: 47
• Page End: 54
• Publication Date: 2017-09
• Subjects: Ocean wave energy converter -- Harmonic oscillator -- Differential pressure; Ocean energy resources -- Periodicals; Marine resources -- Periodicals; 333.9164
• DOI: 10.1016/j.ijome.2017.05.006
• Languages: English
• ISSNs: 2214-1669

Abstract

Highlights: Governing equations for differential pressure wave energy converter concept. Frequency response as a function of dimensions and mechanical properties. Conversion efficiency of around 27%. Numerical Euler method modelling of transient motion. Abstract: A pressure differential sea wave energy converter concept using the forced harmonic motion of a hydraulic water column and hydraulic piston is presented. The mechanical power from the hydraulic piston is converted to electrical power by a linear induction generator. The equation of motion, and electrical power generated are derived in terms of design dimensions and mechanical properties of the wave energy converter. The frequency response of the system is modelled numerically for a variety of wave frequencies, and its time response is modelled using a simple Euler method numerical model. It was found that the wave energy converter yields a maximum conversion efficiency of 27% and a prompt transient response to actuation with waves around its natural frequency. High survivability and reduced visual and water-surface impact are likely advantages of this design concept, since all mechanical components may be incorporated into the sea-floor and shoreline.