# Homework Help: Thermodynamic questions

1. Dec 9, 2007

### pearltt

1. The problem statement, all variables and given/known data
consider an ideal rankine cycle with 1 open feedwater heater, the operates at a condenser pressure of 1inch of mercury absolute pressure and a turbine inlet pressure of 950psig and 850 deg F. The cycle produces turbine output power of 30MW.
a)draw system diagram---done
b)first determine the amout of turbine extraction steam flow rate for a turbine inlet flow of 100 lb/h to heat the feedwater water to 325 deg F and state the gauge pressure of the extraction steam. ---- no idea how to set this up,
c)determine the actual amount of extraction stream(lb/h) to produce 30MW fo turbine power. ----im guessing this would be easily done once i figure out part b
d)cycle efficiency --- i see no problem in doing this part
e) t-s diagram-----done.

2. Relevant equations

3. The attempt at a solution
nothing noteworthy....i need most of the help on getting started and setting up, i am pretty sure everything else will follow pretty easily from there