(example question from slides) A heat pump is to be used to heat a building during the winter. The building is to be maintained at 21 C at all times. The building is estimated to be losing heat at a rate of 135,00 kJ/h when the outside temperature drops to -5 C. a) Determine the maximum COP b) Determine the minimum power required for this heat pump

(example question from slides) A heat pump is to be used to heat a building during the winter. The building is to be maintained at 21 C at all times. The building is estimated to be losing heat at a rate of 135,00 kJ/h when the outside temperature drops to -5 C. a) Determine the maximum COP b) Determine the minimum power required for this heat pump

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter44: Geothermal Heat Pumps

Section: Chapter Questions

Problem 10RQ: A(n) ______well draws water from the top of thewater column, circulates it through the heat pump,...

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A(n) ______well draws water from the top of thewater column, circulates it through the heat pump, and then returns the water to the bottom of the water column.
If 14 gpm of water is flowing through an open-loop heat pump with a temperature difference of 7F, how much heat in Btu/h is being absorbed or rejected in the heat pump? Show all work and units.
A heat pump is used to heat a house. When the outside air temperature is 266K and the inside is maintained at 293K, the heat loss from the house is 195 kW. a. What is the minimum electric power (kW) required to operate the heat pump? b. What is the rate of heat transfer to the heat pump? C. What is the COP for an ideal heat pump operating between these temperatures?
1)with an aid of a drawing show how a Central cooling system that cool different machinery in the ship engine room. 2)
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150W of energy is used to run a household refrigerator and 400W of heat is dissipated into the environment. a) Calculate the heat absorbed by the refrigerator. b) Calculate the COP value of the refrigerator
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Name three other examples of heat energy transfer in the home
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A 750 MW power plant operates between 450 0C and 40 0C thermal reservoirs. If this plant has a cycle thermal efficiency of 48 %, a) calculate the needed energy input to the thermal engine, and the b) needed mass flow rate of cooling water needed at the condenser if its DT has to be 25 0 The cooling water has a density of 1000kg/m3 and a specific heat of 4.181 kJ/(kg-K).
Problem The operating temperatures of a single stage vapour absorption refrigeration system are: generator: 90°C; condenser and absorber: 40°C; evaporator: 0°C. The system has a refrigeration capacity of 100 kW and the heat input to the system is 160 kW. The solution pump work is negligible. a) Find the COP of the system and the total heat rejection rate from the system. b) An inventor claims that by improving the design of all the components of the system he could reduce the heat input to the system to 80 kW while keeping the refrigeration capacity and operating temperatures same as before. Examine the validity of the claim.
a. Explain the principle of operation of geothermal heat pump depicted in the Figure below. Geothermal Heat Pump (heating, cooling. domestic hot water) Ground loop - plastic pipe in drill hole b. Explain how the solar water heater (s@ picture a) and the solar oven (see picture b) operate. Cool Collector Hot Hot water Warm water storage Cool Cold water a) b)