(b) How much heat in kilocalories would it pump into the warm environment if 3.60 x 107 J of work (10.0 kw · h) is put into it? 4.287e4 V kcal (c) Assume the cost of this work input is 10c/kw · h. Also assume that the cost of direct production of heat by burning natural gas is 81.0c per therm (a common unit of energy for natural gas), where equals 1.055 x 10° J. Compare the cost of producing the same amount of heat by each method. cost of heat pump cost of natural gas 0.692

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(a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature of 53.3°C and a cold reservoir temperature of -12.2°C?
4.982
(b) How much heat in kilocalories would it pump into the warm environment if 3.60 x 107 ) of work (10.0 kw · h) is put into it?
4.287e4
v kcal
(c) Assume the cost of this work input is 10c/kW · h. Also assume that the cost of direct production of heat by burning natural gas is 81.0c per therm (a common unit of energy for natural gas), where a therm
equals 1.055 x 10° J. Compare the cost of producing the same amount of heat by each method.
cost of heat pump
= 0,692
cost of natural gas
Check unit conversions and your calculations.
Transcribed Image Text:(a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature of 53.3°C and a cold reservoir temperature of -12.2°C? 4.982 (b) How much heat in kilocalories would it pump into the warm environment if 3.60 x 107 ) of work (10.0 kw · h) is put into it? 4.287e4 v kcal (c) Assume the cost of this work input is 10c/kW · h. Also assume that the cost of direct production of heat by burning natural gas is 81.0c per therm (a common unit of energy for natural gas), where a therm equals 1.055 x 10° J. Compare the cost of producing the same amount of heat by each method. cost of heat pump = 0,692 cost of natural gas Check unit conversions and your calculations.
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