Question: A refrigeration system designed to operate at very cold conditions uses R-134a as the working fluid. The evaporator is at -90 o C, while the

A refrigeration system designed to operate at very cold conditions uses R-134a as the working fluid.

The evaporator is at -90 oC, while the condenser operates at 1 MPa.

The following enthalpies are know:

Outlet of the evaporator: 106.50 kJ/kg

Inlet of the condenser: 153.94 kJ/kg

Outlet of the condenser: 16.04 kJ/kg

How work is added to the compressor?

How much thermal energy is rejected in the condenser?

How much thermal energy is absorbed in the evaporator?

How much work occurs in the throttle? (Answer in kJ/kg)

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