The compressor in a refrigerator compresses saturated R-134a vapor at 0°F to 200 psia. Calculate the work required by this compressor, in Btu/lbm, when the compression process is isentropic. Use the tables for R-134a.

Respuesta :

Answer:

The work required is W =  20.2 BTU per lbm

Explanation:

The value of entropy & enthalpy at initial conditions are

[tex]h_{1}[/tex] = 103.1

S = 0.225

Final enthalpy

[tex]h_{2}[/tex] = 123.3

Therefore work done

W = [tex]h_{1}[/tex] - [tex]h_{2}[/tex]

W = 103.1 - 123.3

W = - 20.2 BTU per lbm

Therefore the work required is W =  20.2 BTU per lbm