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Question (2) a) What are different methods to harness power from water available in seas? b) What is OTEC? On what

principle does it work. c) Find the power that could be extracted from a sea wave front that is 2 km long having a high peak (amplitude) of 5 meters and frequency of 0.1 Hz. d) Determine the minimum speed of the tide approaching the tidal turbine that produces a power of 1 MW. The blade hub and tip diameters are 0.5 m and 16.5 m respectively. Its power coefficient is 0.35 and density of sea water is 1030 kg/m'. Find its blade tip speed ratio if its design rotational speed is 14 rpm. Oution E

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