A heat pump consists of the hardware shown, with refrigerant 134a as the working fluid. The valve and compressor are well insulated and may be treated as adiabatic. Measurements during operation are as follows:? T₁ = 265 K, P₁ = P₄ = 0.2 MPa,? T₂ = 350 K, P₂ = P₃ = 1.5 MPa,? Compressor power input W?_comp?= 10 kW,? Saturated liquid at state 3.

Applying basic principles and suitable idealizations, determine the evaporator heat transfer rate Q?_evap?(kW) and the compressor isentropic efficiency.

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3 4 valve Qcond to warm out doors IMH condenser compressor evaporator 2 1 Qevap from cool house W.com comp