6-125 A heat pump designer claims to have an air-source heat pump whose coefficient of performance is 1.8 when heating a building whose interior temperature is 300K and when the atmospheric air surrounding the building is at 260K. Is this claim valid?
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- The operating condition for the single compressor in a household refrigerator is the lowest box temperature, which is typically A. 0F B. -20F C. 20F D. 40FProvide complete solution and detailed diagram. The thermodynamic efficiency of a heat engine that rejects heat at a rate of 20 MW when heatis supplied to it at a rate of 60 MW is: A. 33.3% B. 50% C. 66.7% D. 75%Pls. Answer thank you! An air-conditioning system is used to maintain a house at 75°F when the temperature outside is 95°F. The house is gaining the heat through the walls and windows at a rate of 1250 Btu/min, and the heat generation rate within the house from people, lights, and appliances amounts to 350 Btu/min. Determine the minimum power input required for this air-conditioning system.
- A heat engine with a thermal efficency of 45% rejects 500kJ/kg of heat. How much heat does it recieve?A parameter used to characterize the heat pump cycle performance is called the thermal efficiency. True or False?QI (ii) Figure QI (ii) a residential heat pump plant has a coefficient of Performance 2.4. Calculate how much heating effect, in kJ/h, will result When 5 kW is supplied to this heat pump? Он Figure QI (ii) went HP TL QL
- b) An inventor designed a cooling device with an efficiency coefficient of 8.5 between -10°C indoor temperature and 25°C room temperature. He claims to be running his machine. Could this claim be true? Why?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 UPVOTEA 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 homeowner is trying to decide whether to heat with a furnace rated at 95% efficiency or by an electrically powered heat pump. She lives in a town where electricity is produced by a coal-fired power plant that claims to operate with 1st law efficiency that is 55% of the Carnot limit. The heat pump's CoP is advertised to be 40% of the Carnot limit. For what range of outside temperatures To would the 2nd law efficiency of the furnace be greater than that of the heat pump? Assume T+ = 400°C, T- = T= 40°C. %3DSince Lucas is an engineer familiar with thermodynamics. He decided to create his own heat engine at home to avoid paying for electricity. He created a small, makeshift heat engine for trial. The combustion of his fuel. diesel, reaches a temperature of 750°C, while waste heat is disposed to the atmosphere at 50°C. He, then connected a generator and a heat pump to the heat engine to check the amount of power being produced. Assume that the heat pump will be used to warm his room to 25°C, while the outside temperature is at 5°C. Lucas' rooms loses 85,000 kJ/hr of heat. And, 25% of the heat engine's power output goes to the heat pump. How much diesel (in kg) needs to be burned by the heat engine to maintain the temperature in Lucas' room? Assume carnot heat engine and heat pump. If the natural gas has a heating value of 22,000 BTU/lb.A heat pump absorbs 10 kW of heat from outside environ- ment at 250 K while absorbing 15 kW of work. It deliv- ers the heat to a room that must be kept warm at 300 K. The Coefficient of Performance (COP) of the heat pump is