How can I improve the design of my steam power plant for optimal efficiency?

AI Thread Summary
The discussion focuses on designing a steam power plant with a load of 74,000 KW, emphasizing the need to calculate pressures, temperatures, and enthalpies at various stages. The first step involves assuming specific pressures and ensuring that enthalpy values do not exceed saturation limits. The second step requires calculating extraction percentages, aiming for less than 25%. The user is encountering issues with the third checking phase, reporting negative losses and low output percentages. The thread is currently open for reference to an attached Excel file, but homework questions should be directed to the appropriate forum.
haikara
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Hi professionals, I am a student from philippines and
im about to design a steam power plant with 74000 KW load.
Our professor gave us a 3 steps at first chapter

the first is that we assume the pressures needed from P2 to P8 where P2 = 8 MPa
assume T2 at centigrade, and get the enthalpies up to P8
T2 must be greater than t5, and h5 = h4' + 150
h7' must not go beyond saturation line
h8' must not go above saturation line

look at my MS excel for more infos.

second is we must get the percent extraction of <25% by getting h9 to h15

look at my MS excel for more infos.

3rd checking (look at my MS excel for more infos.)

my problem now is the 3rd checking. I am getting negative losses, low % output, I am exceeding 30% at Qbd,Qref,Qfluegas.
 

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Homework thread locked.

Please post homework questions in the homework forums of Physics Forums.

I am leaving this viewable for the time being, since it contains an attachment relevant to the problem. Once a new thread is created in the homework forum, feel free to link to this thread for access to the Excel file. If this happens, I can then merge this thread with the one in the Homework section.
 

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