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1st Law Work in a Turbine |
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| Jun12-12, 07:49 AM | #1 |
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1st Law Work in a Turbine
So I'm just a little confused with turbine work.
Generally I've been solving it with first law -W = H2 - H1, so W = H1 - H2 = Cp(T1 - T2) But what about Q - W = U2 - U1? Can't that make it W = U1 - U2 = Cv(T1 - T2) giving a different answer. I have a feeling my understanding of something is amiss. |
| Jun12-12, 07:53 AM | #2 |
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Something in my head clicked and I'm guessing the Q - W = dU is only for closed systems?
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| Jun13-12, 09:42 AM | #3 |
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Does this explanation from the point of view of a polytropic process helps you?
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