Prof. Modyn proposes a multi-step, steady-state approach to cooling low-pressure steam before it's exhausted to the ambient.\ The steam enters a compressor at

1.50k(g)/(s),0.100MPa

, and

285\\\\deg C

where it is adiabatically compressed to

1.20MPa

requiring\

2250kW

. The water is then feed to a well-insulated counter-current heat exchanger where it is isobarically cooled with air\ flowing at

1.14kmo(l)/(s)

. The air enters the exchanger at

25.0\\\\deg C

and leaves at

185\\\\deg C

. Lastly, the water is fed to a well-insulated\ throttle valve where it is reduced back to

0.100MPa

forming a 2-phase product. Neglect changes in kinetic and potential\ energy.\ Assume air is an ideal gas with

hat(C)p[k(J)/(k)mol*K]=27.9+4.78\\\\times 10^(-3)T

with

T

in

K

.

Prof. Modyn proposes a multi-step, steady-state approach to cooling low-pressure steam before it's exhausted to the ambient. The steam enters a compressor at 1.50kg/s,0.100MPa, and 285C where it is adiabatically compressed to 1.20MPa requiring 2250kW. The water is then feed to a well-insulated counter-current heat exchanger where it is isobarically cooled with air flowing at 1.14kmol/s. The air enters the exchanger at 25.0C and leaves at 185C. Lastly, the water is fed to a well-insulated throttle valve where it is reduced back to 0.100MPa forming a 2-phase product. Neglect changes in kinetic and potential energy. Assume air is an ideal gas with C^p[kJ/kmolK]=27.9+4.78103T with T in K