Homework 4 Mastering Physics: Principles of Physics Spring 2017 Homework 4 Probl

Question

Homework 4 Mastering Physics: Principles of Physics Spring 2017 Homework 4 Problem 19.37 me Problem 19.37 There has long been an interest in using the vast quantities of thermal energy in the oceans to run heat engines. A heat engine needs a temperature pi difference, a hot side and a cold side. Conveniently, the ocean surface waters are warmer than the deep ocean waters. Suppose you build a floating power plant in the tropics where the surface water temperature is 30 C. This would be the hot reservoir of the engine. For the cold reservoir, water would be pumped up from the ocean bottom where it is always 5 C. Par

Explanation / Answer

Source temperatute=T1= 30 degree celsius= 303K

Sink temperature = T2= 5 degree celsius= 278K

Efficiency of heat engine = ( T1-T2)/T1 x 100

=(303-278)/ 303 x 100

=2500/303

=8.25% efficiency.

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