(A) a Tidal Turbine Has an Efficiency of 40

question 20

Essay

(a) A tidal turbine has an efficiency of 40%. In a tidal stream with a velocity of 7 m/s, what is the diameter of a turbine that is required to produce 1 MWe?
(b) A wind turbine has an efficiency of 40%. In a wind with a velocity of 7 m/s, what is the diameter of a turbine that is required to produce 1 MWe?
(c) From the answers to parts (a) and (b), calculate the relative mass of water to air passing through the rotor per second.

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