a) The city pool loses 1.0 inch of water every week due to evaporation. If the pool is 25yards long and 12 yards wide, what is the energy required to keep the pool at 15ᵒC? Inother words, how much energy is needed to evaporate all of this water at 15ᵒC?Note: the conversion factor from kW to Btu/hr is 3,412 kW/Btu*hrAnswer: 14.9 x 106 Btu per weekb) If the cost of energy is $0.10 per kW*hr, would it be worth purchasing a $1600 pool coverthat reduces evaporation to 15% of that for an uncovered pool over a 4-month season?How long will it take to recover the purchase price or “pay itself off”? Yes, 4.32 weeks
a) The city pool loses 1.0 inch of water every week due to evaporation. If the pool is 25yards long and 12 yards wide, what is the energy required to keep the pool at 15ᵒC? Inother words, how much energy is needed to evaporate all of this water at 15ᵒC?Note: the conversion factor from kW to Btu/hr is 3,412 kW/Btu*hrAnswer: 14.9 x 106 Btu per weekb) If the cost of energy is $0.10 per kW*hr, would it be worth purchasing a $1600 pool coverthat reduces evaporation to 15% of that for an uncovered pool over a 4-month season?How long will it take to recover the purchase price or “pay itself off”? Yes, 4.32 weeks
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
Related questions
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 15ᵒC? In
other words, how much energy is needed to evaporate all of this water at 15ᵒC?
Note: the conversion factor from kW to Btu/hr is 3,412 kW/Btu*hr
Answer: 14.9 x 106 Btu per week
b) 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?
How long will it take to recover the purchase price or “pay itself off”?
Yes, 4.32 weeks
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