Unformatted text preview: SP 21 : Answer the following: a) Does a heat engine that has a thermal efficiency of 100 percent necessarily violate (i) the first law and (ii) the second law of thermodynamics? Explain. b) In the absence of any friction and other irreversibilities, can a heat engine have an efficiency of 100 percent? Explain. c) Are the efficiencies of all the work-producing devices, including the hydroelectric power plants, limited by the Kelvin–Planck statement of the second law? Explain. d) Solar energy stored in large bodies of water, called solar ponds, is being used to generate electricity. If such a solar power plant has an efficiency of 4 percent and a net power output of 350 kW, determine the average value of the required solar energy collection rate, in Btu/h. sink HE Solar pond Source 350 kW 4%...
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This note was uploaded on 04/23/2011 for the course ME 200 taught by Professor Gal during the Spring '08 term at Purdue.
- Spring '08