Heat exchanger - efficiency of the cycle

[EastWindBreaks]

Homework Statement

Homework Equations

The Attempt at a Solution

Since we want the fluid to be in liquid state before entering a boiler, and super-heated water can only reach 374°C before entering super-critical state, suppose after the expansion, the temperature at point 3 is still higher than 374°C, does that mean the condenser must still reject enough heat to ensure the working fluid is in liquid form, since Q_out is large, the efficiency of the cycle won't be as good?

 

[Chestermiller]

Let's see what your concept of the process looks like if the temperature at point 3 is above the critical temperature. Please show us the TS diagram, also showing, for reference, the vapor-liquid equilibrium region.

Is this really a homework problem?

 

[EastWindBreaks]

Let's see what your concept of the process looks like if the temperature at point 3 is above the critical temperature. Please show us the TS diagram, also showing, for reference, the vapor-liquid equilibrium region.

Is this really a homework problem?

its not a homework problem, I was just curious while reading about the textbook chapter on power cycles, since it is desirable to have high temperature input, I was thinking maybe that temperature can be so high that the temperature of the fluid coming out of the turbine might able to reach above 374 Celsius ?

 

[Chestermiller]

its not a homework problem, I was just curious while reading about the textbook chapter on power cycles, since it is desirable to have high temperature input, I was thinking maybe that temperature can be so high that the temperature of the fluid coming out of the turbine might able to reach above 374 Celsius ?

OK. So let's see your TS diagram of the cycle. I'm particularly interested in the part of the path through the condenser (or cold sink).