Engineering, 26.02.2020 18:05 Tyrant4life
A heat pump (working in a thermodynamic cycle mode) is to be used to heat a house during the winter. The house is to be maintained at 294 K at all times. The house is estimated to be losing heat at a rate of 135,000 kJ/h when the outside temperature drops to 268 K. If the heat pump under these conditions has a coefficient of performance of 4, (a) Determine the power required to drive this heat pump (b) Determine the rate at which heat is absorbed from the cold outdoor air Repeat the questions assuming the heat pump works in a reversible mode. You need to calculate the coefficient of performance under these conditions.
Answers: 2
Engineering, 04.07.2019 18:10
The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false
Answers: 2
Engineering, 04.07.2019 18:10
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.
Answers: 1
Engineering, 04.07.2019 18:20
Have a greater impact on maintenance productivity than any other support group. (clo5) a)-the top management b)-inventory and purchasing c)-sub-contracting d)-cmms
Answers: 2
Engineering, 04.07.2019 18:20
Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency
Answers: 1
A heat pump (working in a thermodynamic cycle mode) is to be used to heat a house during the winter....
Social Studies, 17.07.2019 00:30
Mathematics, 17.07.2019 00:30
History, 17.07.2019 00:30
Mathematics, 17.07.2019 00:30
History, 17.07.2019 00:30
Mathematics, 17.07.2019 00:30
Mathematics, 17.07.2019 00:30
History, 17.07.2019 00:30
Mathematics, 17.07.2019 00:30
Mathematics, 17.07.2019 00:30