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.

the answer is b, have negligible mass

c) up is the direction the magnetic force is acting on the charge.