What would be the maximum work you could extract from the pr

What would be the maximum work you could extract from the process stream if you replaced the heat exchanger and cooling stream with another steady state device. The stream is water. See properties for water below. The surroundings are a heat reservoir at T = 25 degree Celsius and heat exchange from the system occurs at this temperature.

Solution

The workdone in a process is the change in the Enthalpy.

In the given problem, the inlet conditions are P=50MPa & Temp =300C and the Outlet conditions are P=50 MPa and Temp= 140C.

From the given Table, Inlet Enthalpy is h₁=1323KJ/Kg K. and outlet Enthalpy is h₂=622.35 KJ/KgK.

The workdone is h₂-h₁ = 1323-622.35=700.65KJ/KgK