What is the cost of energy saved daily per ft2 by using, Mechanical Engineering

What is the cost of energy saved daily per ft2 by using

A homeowner in Harrisonburg has asked you for help on the economic feasibility of using solar power for hot water heating. Electric power costs $0.07/kW.hr and a single-pane flat plate solar collector system cost about $22 per ft2 of collector area. The daily mean insolation in Harrisonburg is 1250 Btu/ft2 .day.

a) What is the cost of electric power in $/106 Btu?

b) What is the cost of energy saved daily per ft2 by using solar power instead of electric power, if the average collector efficiency is 35%?

c) What is the payback period in years?

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Mechanical Engineering: What is the cost of energy saved daily per ft2 by using

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Mechanical Engineering: What is the cost of energy saved daily per ft2 by using

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