Quantitative assessment of the proposed wave energy demonstration farm off the coast of Portland, Victoria

The attached report is another that I wrote as part of my studies and which I thought may be of interest.

It is an assessment of the viability of a wave energy farm off the coast of my home town Portland, Victoria, Australia.

The proposed wave energy farm is being developed using buoys which rise and fall with the passing waves. The heaving of the buoy, which consists of a stationary lower section under the water and an upper section moving up and down, in turn drives a mechanical generator.

One of the problems with the viability of wave energy technology is that the current devices tend to have optimum wave height and frequency ranges; the further away conditions are from ideal, the greater the drop in the efficiency of energy production. Ocean conditions are highly variable and difficult to predict.

Fortunately, immediately prior to researching the project Sustainability Victoria had just finished compiling 2 years worth of wave height and frequency data at a location not far from where the project is planned to be installed. The plethora of wave data in the area of the project allowed a reasonably detailed analysis of average wave height and frequency and standard deviations on either side of the average. January and June were selected as months providing an indication of wave conditions in summer and winter conditions and data from those months were analysed to get an idea of the range of conditions that the buoys would encounter.

My conclusion raised concerns about the particular buoys to be used combined with the variability of conditions being able to efficiently convert the energy stored in the passing waves into electrical energy.

Qualitative assessment of wave energy demonstration farm off Portland, Victoria

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