Steam at 700 F, 600 psia enters a turbine operating atsteady state and exits at

Question

Steam at 700 F, 600 psia enters a turbine operating atsteady state and
exits at 0.6 psia with a quality of 0.90.   
The turbine develops 12000 hp and
heat transfer from the turbine to the surroundings occurs at a rateof 2,500,000 Btu/h.  

Determine the mass flow rate of the steam. Steam at 700 F, 600 psia enters a turbine operating atsteady state and
exits at 0.6 psia with a quality of 0.90.   
The turbine develops 12000 hp and
heat transfer from the turbine to the surroundings occurs at a rateof 2,500,000 Btu/h.  

Determine the mass flow rate of the steam.

Explanation / Answer

at T1=700F and p1=600psiafrom steam tables h1=1350.6Btu/lb at exit pressure p2=0.6psia fromsaturated steam tables h2=hf+x2hfg    =53.27+0.9*1045.4 h2=994.13Btu/lb turbine powerWT=12000hp                           =12000*2544.43Btu/h by using energy equation Q+mh1=W+mh2                      (since heat transfer takes place from systm tosurroundings it is negative) -2500000+m*1350.6=30533160+m*994.13 m=92667.433lb/h m=25.74097lb/s i hope this helps best of luck with rest ofyour course work

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