Determine the work input and entropy generation during the compression of steam from 100 kPa to 1 MPa in an adiabatic compressor if the inlet state is saturated vapor and the isentropic efficiency is 85 percent.

The value of work input to the compressor = 1505.7

The value of entropy generation inside the compressor

Explanation:

Initial pressure = 100 k pa

Final pressure = 1 M pa = 1000 k pa

At initial pressure = 100 k pa the steam is saturated vapour. From the steam tables the value of volume at this state is = 1.673

Thus the work input to the compressor =

⇒ =  ( - )

⇒ = 1.673 ( 1000 - 100 )

⇒ = 1505.7

The isentropic efficiency is  = 85 %

So the work input to the compressor =

⇒ =  1771.42

This is the value of work input to the compressor.

This is the value of entropy generation inside the compressor.

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