# Steam plant question.

Im attempting this question for an evening class im attending. hope im posting in the right place. I'm not sure where I have gone wrong think its where I rearranged my formula to find steam output.

Question attached below

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## Answers and Replies

The work is a bit unclear. I'll get back to you in a day or so.

anthonyk2013
Ok Thanks

I think I calculated the steam output wrong, I have the over all efficiently of the system 77%, what formula do I use the calculate steam output?

Q=M(h2-h1)

Yeah that's the one..!
For calculating the steam output, you can directly use the 77% efficiency without involving the economizer and super heater (if I'm not wrong).
So 77% of the heat obtained from the combustion of coal is used to convert water to steam.

Yeah that's the one..!
For calculating the steam output, you can directly use the 77% efficiency without involving the economizer and super heater (if I'm not wrong).
So 77% of the heat obtained from the combustion of coal is used to convert water to steam.

77% is the overall efficiency am I right ? So did I divide .77 by h2-h1 to get steam output?

77% is the overall efficiency am I right ? So did I divide .77 by h2-h1 to get steam output?
Yes! And equate it with the energy provided by the combustion of coal. Tell me if that gives the right answer.

6244.09 kg/h

I meant did you get the right answer?