Carnot heat pump is to be used to heat a house and maintain it at 25°C in winter. On a day when the average outdoor temperature remains at about 4°C, the house is estimated to lose heat at a rate of 110,000 kJ/h. The heat pump consumes 4.75 kW of power while operating. Determine; a. How long the heat pump ran on that day, in h. b. The total heating costs, assuming an average price of TLO.75/kWh for electricity. c. The heating cost for the same day if resistance heating is used instead of a heat pump.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Thermodynamics

1. Carnot heat pump is to be used to heat a house and maintain it at
25°C in winter. On a day when the average outdoor temperature
110,000 Ih
remains at about 4°C, the house is estimated to lose heat at a rate
of 110,000 kJ/h. The heat pump consumes 4.75 kW of power while
operating. Determine;
a. How long the heat pump ran on that day, in h.
b. The total heating costs, assuming an average price of
TLO.75/kWh for electricity.
c. The heating cost for the same day if resistance heating is used
instead of a heat pump.
25°C
HP
14.35kW
Ouidoors
4'C
Transcribed Image Text:1. Carnot heat pump is to be used to heat a house and maintain it at 25°C in winter. On a day when the average outdoor temperature 110,000 Ih remains at about 4°C, the house is estimated to lose heat at a rate of 110,000 kJ/h. The heat pump consumes 4.75 kW of power while operating. Determine; a. How long the heat pump ran on that day, in h. b. The total heating costs, assuming an average price of TLO.75/kWh for electricity. c. The heating cost for the same day if resistance heating is used instead of a heat pump. 25°C HP 14.35kW Ouidoors 4'C
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