Refrigerant-134a enters a adiabatic compressor at 100 kPa and –24°C with a flow rate of 1.35 m3/min and leaves at 800 kPa and 60°C. Determine the mass flow rate of R-134a and the power input to the compressor. Use data from the steam tables. Heat transfer with the surroundings is negligible. Neglect kinetic and potential energy changes.

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.