5.16a) From the isobutane thermodynamic properties figure in the problem, with the condenser operating at 320 K, P≈0.675 MPa. Also, ()kJˆH leaving condenser273kg∼b) Isobutane entering the turbine is at 100 MPa and 480 K. From the figure, kJkJˆˆH=775.6and S=2.259kgkg K⋅. Also, isobutane leaving the turbine is at P = 0.675 MPa and kJˆS=775.6kg K⋅, which corresponds to about 360 K and kJˆH=665kg. c) From the energy balance, the work produced in the turbine is ininoutindU-WkJˆˆ0MHHW so that 775.6665110.6dtkgM==−+=−=±±±Since 3 MW=3000 kW=3000 kJ/s the isobutane flow rate is
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This note was uploaded on 01/20/2012 for the course CHE 330 at USC.