- #1
cheme2019
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Homework Statement
A Carnot engine with water as the working fluid operates with a water recirculation rate of 1 kg/s. For TH = 475 K and TC = 300 K, determine:
a. The pressure of each state
b. The quality of each state
c. The rate of heat addition
d. The rate of heat rejection
e. The mechanical power for each of the four steps
f. The thermal efficiency of the cycle
g. Is the cycle feasible? Why or why not?
Homework Equations
Steam Tables, TS diagram.
The Attempt at a Solution
I just need to get over the first hurdle, then I can finish the problem..
I assumed at the 1st point, the quality of the mixture is 0 (sat'D liquid). Using T= 202 deg C and the steam tables, I get
P = 1.55 MPa
V= .1159 m^3/kg
U = 851 kJ/kg
H = 853 kJ/kg
S = 2.34 kJ/kgK
I know at the 2nd state, the temperature is the same, and that the quality should be 1 (sat'D vapor), however this would imply that the pressure didn't change, which according to a PV diagram isn't the case. Can someone help guide me in the right direction? Thanks!