Current Attempt in Progress

Refrigerant $134$a is compressed from $3$ bar, saturated vapor, to $\frac{10}{b}ar,90C$ in a compressor operating at steady state. The mass flow

rate of refrigerant entering the compressor is $7k\frac{g}{m}in,$ and the power input is $10\mathrm{.}85$ kW $.$ Kinetic and potential energy effects can be

neglected.

$($a$)$ Determine the rate of heat transfer for the compressor, in kW $.$ Note that heat transfer is positive going into the compressor.

$($b$)$ If the heat transfer occurs at an average surface temperature of $50C,$ determine the rate of entropy production, in $k\frac{W}{K}.$

$($c$)$ Determine the rate of entropy production, in $K\frac{W}{K},$ for an enlarged control volume that includes the compressor and its immediate

surroundings such that the heat transfer occurs at $300$ K $.$

Part A

Determine the rate of heat transfer for the compressor, in kW$.$

$Q_{cv}^{}=$

kW