Engineering, 26.11.2019 00:31 Svetakotok
Aheat pump is used to meet the heating requirements of a house and maintain it at 20oc. on a day when the outdoor air temperature drops to -2oc, the house is estimated to lose heat at a rate of 80,000 kj/h. if the heat pump under these conditions has a cop of 2.5, determine
(a) the power consumed by the heat pump and
(b) the rate at which heat is absorbed from the cold outdoor air.
Answers: 3
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Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.
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Engineering, 04.07.2019 18:10
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Engineering, 04.07.2019 19:10
For a process taking place in a closed system containing gas, the volume and pressure relationship is pvi-constant. -1.5 bar, the process starts with initial conditions, pi = =0.03 m3 and ends with final volume, v2-0.05 m3 determine the work done by the gas.
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Aheat pump is used to meet the heating requirements of a house and maintain it at 20oc. on a day whe...
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