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Problem 3 Consider two actual power plants operating with solar energy. Energy is supplied to one plant from a solar pond at 80°C and to the other from concentrating collectors that raise the water temperature to 600°C. Which of these power plants will have a higher efficiency? Explain. Problem 4 An inventor claims to have devised a cyclical engine for use in space vehicles that operates with a nuclear- fuel-generated energy source whose temperature is 910 R and a sink at 480 R that radiates waste heat to deep space. He also claims that this engine produces 4.3 hp while rejecting heat at a rate of 14,500 Btu/h. Is this claim valid?

Problem 3 Consider two actual power plants operating with solar energy. Energy is supplied to one plant from a solar pond at 80°C and to the other from concentrating collectors that raise the water temperature to 600°C. Which of these power plants will have a higher efficiency? Explain. Problem 4 An inventor claims to have devised a cyclical engine for use in space vehicles that operates with a nuclear- fuel-generated energy source whose temperature is 910 R and a sink at 480 R that radiates waste heat to deep space. He also claims that this engine produces 4.3 hp while rejecting heat at a rate of 14,500 Btu/h. Is this claim valid?

Sustainable Energy
Sustainable Energy
2nd Edition
ISBN:9781337551663
Author:DUNLAP, Richard A.
Publisher:DUNLAP, Richard A.
Chapter8: Direct Use Of Solar Energy
Section: Chapter Questions
Problem 2P
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Problem 3 Consider two actual power plants operating with solar energy. Energy is supplied to one plant from a solar pond at 80°C and to the other from concentrating collectors that raise the water temperature to 600°C. Which of these power plants will have a higher efficiency? Explain. Problem 4 An inventor claims to have devised a cyclical engine for use in space vehicles that operates with a nuclear- fuel-generated energy source whose temperature is 910 R and a sink at 480 R that radiates waste heat to deep space. He also claims that this engine produces 4.3 hp while rejecting heat at a rate of 14,500 Btu/h. Is this claim valid?
Transcribed Image Text:Problem 3 Consider two actual power plants operating with solar energy. Energy is supplied to one plant from a solar pond at 80°C and to the other from concentrating collectors that raise the water temperature to 600°C. Which of these power plants will have a higher efficiency? Explain. Problem 4 An inventor claims to have devised a cyclical engine for use in space vehicles that operates with a nuclear- fuel-generated energy source whose temperature is 910 R and a sink at 480 R that radiates waste heat to deep space. He also claims that this engine produces 4.3 hp while rejecting heat at a rate of 14,500 Btu/h. Is this claim valid?
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