[quote author=Fu-Kwun Hwang link=topic=570.msg1977#msg1977 date=1196819359]
Is it a real project(create real device) or is it a homework problem?

Theoretically, the efficiency for carnot cycle only depends on temperature T1, T2.
Do you know about [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=23.0]carnot cycle[/url]? You should be able to find it in standard thermodynamic text-book.

No no it's not real device , it is only calculation i will used EES program
but my dr. want the work net equal 400 MW and the temperture exist from boiler does not excess 620 k ( to can established in Kuwait )
iwant to attachment an EES file to see you what i do , but i do not know how i can attach it ???

thanks alot Mr. and SORRY i lost your time  :(