0
Research Papers: Alternative Energy Sources

Power Absorption Modeling and Optimization of a Point Absorbing Wave Energy Converter Using Numerical Method

[+] Author and Article Information
Jeremiah Pastor

Department of Mechanical Engineering,
University of Louisiana at Lafayette,
Lafayette, LA 70504
e-mail: jeremiah@louisiana.edu

Yucheng Liu

Department of Mechanical Engineering,
University of Louisiana at Lafayette,
Lafayette, LA 70504
e-mail: yucheng.liu@louisiana.edu

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received November 14, 2013; final manuscript received March 19, 2014; published online April 28, 2014. Assoc. Editor: Kau-Fui Wong.

J. Energy Resour. Technol 136(2), 021207 (Apr 28, 2014) (8 pages) Paper No: JERT-13-1324; doi: 10.1115/1.4027409 History: Received November 14, 2013; Revised March 19, 2014

This paper presents, assesses, and optimizes a point absorber wave energy converter (WEC) through numerical modeling, simulation, and analysis. Wave energy conversion is a technology uniquely suited for assisting in power generation in the offshore oil and gas platforms. A linear frequency domain model is created to predict the behavior of the heaving point absorber WEC system. The hydrodynamic parameters are obtained with AQWA, a software package based on boundary element methods. A linear external damping coefficient is applied to enable power absorption and an external spring force is introduced to tune the point absorber to the incoming wave conditions. The external damping coefficient and external spring forces are the control parameters, which need to be optimized to maximize the power absorption. Two buoy shapes are tested and a variety of diameters and drafts are compared. Optimal shape, draft, and diameter of the model are then determined to maximize its power absorption capacity.

FIGURES IN THIS ARTICLE
<>
Copyright © 2014 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Flowchart of the design optimization process

Grahic Jump Location
Fig. 2

Schematic representation of a heaving point absorber with applied spring control force

Grahic Jump Location
Fig. 3

AQWA program suite and flow

Grahic Jump Location
Fig. 4

The two buoy shapes considered in this study: Hemispherical and conical shape

Grahic Jump Location
Fig. 5

Buoy draft and diameter descriptions

Grahic Jump Location
Fig. 6

Jonswap wave spectrum for eight sea states

Grahic Jump Location
Fig. 7

Added mass of the conical and hemispherical buoy with a diameter of 3.5 m and a draft of 2 m

Grahic Jump Location
Fig. 8

Radiation damping of the conical and hemispherical buoy with a diameter of 3.5 m and a draft of 2 m

Grahic Jump Location
Fig. 9

Heave excitation force of the conical and hemispherical buoy with a diameter of 3.5 m and a draft of 2 m

Grahic Jump Location
Fig. 10

Phase angle of the conical and hemispherical buoy with a diameter of 3.5 m and a draft of 2 m

Grahic Jump Location
Fig. 11

Buoy shape analysis of conical and hemispherical buoy

Grahic Jump Location
Fig. 12

Power absorption of the conical buoy with drafts of 2, 2.5, and 3.5 m

Grahic Jump Location
Fig. 13

Power absorption of the conical buoy with a draft of 2 m and diameters ranging from 1.5 to 6.5 m

Grahic Jump Location
Fig. 14

Efficiency of the conical buoy with a draft of 2 m and diameters ranging from 1.5 to 6.5 m

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In