an average size home refrigerator unit has a 1/3 horsepowerfan motor for blowing
ID: 1741400 • Letter: A
Question
an average size home refrigerator unit has a 1/3 horsepowerfan motor for blowing air over the inside cooling coils, a 1/3horsepower fan motor for blowing air over the outside condensercoils, and a 3.70 horsepower compressor motor. a) all three motors use electric energy at what rate b) if electricity cost $0.0/kwh, what is the cost to operatethe unit per hour. an average size home refrigerator unit has a 1/3 horsepowerfan motor for blowing air over the inside cooling coils, a 1/3horsepower fan motor for blowing air over the outside condensercoils, and a 3.70 horsepower compressor motor. a) all three motors use electric energy at what rate b) if electricity cost $0.0/kwh, what is the cost to operatethe unit per hour.Explanation / Answer
a. totalpower P = P1 + P2 + P3 = (1/3)+ (1/3) +3.70 = 4.37 hp 1horsepower = 746 W => P = 4.37*746 = 3260 W Energy consumed persecond = P = 3260 W b. Energy consumed perhour E = P *3600 = 3260 *3600 = 1.174 *107 W-s but 1kWh = 3.6 *106 W-s => E = 1.174* 107 / 3.6 *106 = 3.26 kWh Cost = E* rate Multiplywith proper value of rate of electricity.Related Questions
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