Chapter 5, Problem 5.106EP

A heat pump with a COP of 3.2 is used to heat a perfectly sealed house (no air leaks). The entire mass within the house (air, furniture, etc.) is equivalent to 1200 kg of air. When running, the heat pump consumes electric power at a rate of 5 kW. The temperature of the house was 7°C when the heat pump was turned on. If heat transfer through the envelope of the house (walls, roof, etc.) is negligible, the length of time the heat pump must run to raise the temperature of the entire contents of the house to 22°C is (a) 13.5 min (b) 43.1 min (c) 138 min (d) 18.8 min (e) 808 min

A parameter used to characterize the heat pump cycle performance is called the thermal efficiency. True or False?

Describe the function and components of a heat engine?

Please solve the problem and show work

A heat pump has a coefficient of performance equal to 4.25 and requires a power of 1.61 kW to operate. (a) How much energy does the heat pump add to a home in one hour? (b) If the heat pump is reversed so that it acts as an air conditioner in the summer, what would be its coefficient of performance? Need Help? Read It

A heat pump is used to extract heat from the outside atmosphere to heat the inside of a building. On a day when the outside air temperature is Tc°C, the heat pump is operating to a COP of 3.7, maintaining the inside temperature of the building at Th°C. If the building is losing heat at the rate of 53,709 kJ/hour in these conditions, determine how much power (kW) must be supplied to a heat pump? Keep two decimal places

A heat pump operates on a Carnot heat pump cycle with a COP of 8.97. It keeps a space at 29.03 C by consuming 2.59 kW of power. Determine the heating load (kW) provided by the heat pump. (Use 2 decimal places for the final answer.)

4. A household refrigerator with a COP of 1.25 removes heat from the refrigerated space at a rate of OL Determine (a) the electric power consumed by the refrigerator and (b) the rate of heat transfer to the kitchen air. (20 Do Student number 1 210505269 2 200505527 QL (kJ/min) 90 89 Student 16/10 17

A heat pump is used to meet the heating requirements of a house and maintain it at 20°C. On a day when the outdoor air temperature drops to -2°C, the house is estimated to lose heat at a rate of 63,000 kJ/h. If the heat pump under these conditions has a COP of 1.8, determine the rate at which heat is absorbed from the cold outdoor air. Select one: a. 28,000 kJ/h b. 58,000 kJ/h c. 38,000 kJ/h d. 48,000 kJ/h  NEED ASAP. I WILL UPVOTE