An office building requires a heat transfer rate of 30 kW to maintain the inside temperature at 21°C when the outside te

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An office building requires a heat transfer rate
of 30 kW to maintain the inside temperature at 21°C when
the outside temperature is 0°C. A vapor-compression heat pump with
Refrigerant 134a as the working fluid is to be used to provide the
necessary heating. The compressor operates adiabatically with an
isentropic efficiency of 82%.

Determine appropriate evaporator and condenser pressures of a cycle
for this purpose assuming ΔTcond=ΔTevap= 4°C, as shown in
the T-s diagram. The refrigerant exits the evaporator as saturated
vapor and exits the condenser as saturated liquid at the respective
pressures.

An Office Building Requires A Heat Transfer Rate Of 30 Kw To Maintain The Inside Temperature At 21 C When The Outside Te 1 (30.35 KiB) Viewed 54 times

a.) Determine the mass flow rate of refrigerant, in
kg/s.
b.) Determine the compressor power, in kW.
c.) Determine the coefficient of performance.
AT cond 2s Outside air 21°C 0°C Inside air Teva Condenser Evaporator Expansion valve Compressor 3