Question: A paper mill has two steam generators, one at 4.5 MPa, 300C and one at 8 MPa, 500C. Each generator feeds a turbine, both of

A paper mill has two steam generators, one at 4.5 MPa, 300C and one at 8 MPa, 500C. Each generator feeds a turbine, both of which have an exhaust pressure of 1.2 MPa and isentropic efficiency of 87%, such that their combined power output is 20 MW. The two exhaust flows are mixed adiabatically to produce saturated vapor at 1.2 MPa. Find the two mass flow rates and the entropy produced in each turbine and in the mixing chamber.

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