Question

Two streams of air are fed into a compressor in a steady-state process. The first inlet stream has known flowrate n*1 mol/s, known temperature T1 (K) and known pressure P1 (bar). The second inlet stream has known flowrate n*2 mol/s, known temperature T2 (K) and known pressure P2 (bar). The outlet stream has known temperature T3 (K) but unknown pressure P3 bar. The amount of work required to run the compressor and the temperature of the surroundings are known. Assume ideal gas behavior.

Required:
a. Show the equations that you would use to find Q. Clearly label knowns and unknowns and indicate where you would solve for which items.
b. Show the equations that you would use to find the range of outlet pressures associated with thermodynamically feasible operation. Clearly label knowns and unknowns and indicate where you would solve for which items.

Answer 1

A) Q + W = n1 Cp ( T3 - T1 ) + n2Cp ( T2 - T1 )

Step-by-step explanation:

A) The equation that would use to find Q

Q + W = n1 Cp ( T3 - T1 ) + n2Cp ( T2 - T1 )

Attached below is the remaining part of solution