Energy Yield

Figure 8.5: Annual wave distribution of test site

Controlling the AWS as described in Section 8.1 for the sea state of Figure 8.5 [96] results in the device characteristics shown in Figure 8.6.

Figure 8.6: Characteristics of unrestricted AWS

Waves with longer periods and higher amplitudes have the theoretical possibility of generating huge amounts of power. The demands on the AWS and generator, however, become unrealistic. Figure 8.6 shows power extraction rates of 60 MW at some sea states, corresponding to a floater amplitude of almost 150 m and peak velocity of 60 ms-1. An AWS of such a large stroke is unrealistic, and a generator that could extract reasonable power at the 1-2 ms-1 of a 'typical' stroke would generate enormous voltages at speeds an order of magnitude greater than this. The behaviour of the device is limited by the physical structure, generator and power converter ratings. The present linear generator has a maximum reactive force of 1.8 MN, a maximum surface speed of 2.2 ms-1 and a maximum amplitude of 3.5 m. The corresponding power characteristics are given in Figure 8.7, showing a peak power of 4 MW.

Figure 8.7: AWS force characteristics with limited amplitude and velocity
Renewable Energy Eco Friendly

Renewable Energy Eco Friendly

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

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