Steam turbines, maximum amount of work done?

AI Thread Summary
The discussion revolves around calculating the maximum work output of a steam turbine with an input temperature of 800°C and an exhaust temperature of 150°C. Participants suggest using the Carnot engine concept to derive the maximum work done, represented by the formula W = 0.6Q, where Q is the heat input. Clarification is provided that "for a given heat input Q" means to leave Q as a variable in the final answer rather than substituting a specific value. The conversation highlights the importance of understanding thermodynamic principles in relation to steam turbines. Overall, the focus is on determining the conditions under which maximum work is achieved.
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Steam turbines, maximum amount of work done?

Hi, having a little trouble with this problem, not entierly sure what formula to use, or what value to use for Q.

A steam turbine is operated ith an input temp of 800C and exhaust temp of 150C. What is the maximum amount of work the turbine can do for a given heat input Q? Under what conditions is the maximum achieved?

Thanks in advance
 
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have you tried thinking of the thing as a carnot engine?
 
yeh i have but that would just give me an answer with two undefined variables.

0.6Q=W

in the question it says 'for a given heat input Q' what does that mean exactly, could it mean pick a random value.

Thanks for your reply
 
it means just leave Q in your answer. you've already got it
 

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