Question

An experimental power plant at the Natural Energy Laboratory of Hawaii generates electricity from the temperature gradient of the ocean. The surface and deep-water temperatures are 28 ∘C and 5 ∘C, respectively.

Part A

What is the maximum theoretical efficiency of this power plant?

Part B

If the power plant is to produce a power of 220 kW , at what rate must heat be extracted from the warm water? Assume the maximum theoretical efficiency.

Part C

At what rate must heat be absorbed by the cold water? Assume the maximum theoretical efficiency.

Part D

The cold water that enters the plant leaves it at a temperature of 12 ∘C. What must be the flow rate of cold water through the system? Give your answer in kg/s and L/s.

Part E

Express your answer using two significant figures.

dm/dt = ___________ L/s

Answer #1

n experimental power plant at the Natural Energy Laboratory of
Hawaii generates electricity from the temperature gradient of the
ocean. The surface and deep-water temperatures are 28°C and 6°C,
respectively.
(a) What is the maximum theoretical efficiency of this power
plant?
%
(b) If the power plant is to produce 200 kW of power, at what rate
must heat be extracted from the warm water? Assume the maximum
theoretical efficiency.
MW
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