Question: the compressor of your refrigerator which uses refrigerant134a draws 600...
The compressor of your refrigerator, which uses
refrigerant-134a, draws 600 W of electric power to compress the
refrigerant-134a from 180 kPa and -10 °C to 800 kPa. The mass flow
rate of the refrigerant is 14.4 g/s. The compressor, which you can
assume to be adiabatic, is rather old and there is a considerable
amount of irreversibility due to friction in its internal
a) What is the rate of exergy destruction in the compressor?
b) How much electric power would you save if you replace the compressor with a new one that eliminates almost all the irreversibility while maintaining the exit pressure of 800 kPa (the inlet conditions are the same as the old compressor)?
c) What is the temperature at the exit of the new compressor?
d) Show the process across the old and new compressors on the same T-s diagram.