The city pool loses 1.0 inch of water every week due to evaporation. If the pool is 25 yards long and 12 yards wide, what is the energy required to keep the pool at 15°C. If the cost of energy is $0.10 per kW.hr, would it be worth purchasing a $1600 pool cover that reduces evaporation to 15% of that for an uncovered pool over a 4-month season? Note: the conversion factor from kW to Btu/hr is 3,412 kW/Btu.hr

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Could you give me some explanation, the correct answer is at the bottom of the question.
a) The city pool loses 1.0 inch of water every week due to evaporation. If the pool is 25
yards long and 12 yards wide, what is the energy required to keep the pool at 15°C. If the
cost of energy is $0.10 per kW.hr, would it be worth purchasing a $1600 pool cover that
reduces evaporation to 15% of that for an uncovered pool over a 4-month season?
Note: the conversion factor from kW to Btu/hr is 3,412 kW/Btu.hr
Answer: 14.8 x 106 Btu per week
b) How long will it take to recover the purchase price?
Answer: 4.32 weeks
Transcribed Image Text:a) The city pool loses 1.0 inch of water every week due to evaporation. If the pool is 25 yards long and 12 yards wide, what is the energy required to keep the pool at 15°C. If the cost of energy is $0.10 per kW.hr, would it be worth purchasing a $1600 pool cover that reduces evaporation to 15% of that for an uncovered pool over a 4-month season? Note: the conversion factor from kW to Btu/hr is 3,412 kW/Btu.hr Answer: 14.8 x 106 Btu per week b) How long will it take to recover the purchase price? Answer: 4.32 weeks
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