- #1
davidchen9568
- 21
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Homework Statement
Four thermodynamic processes A,B,C,D are shown in the picture. A and C are adiabatic processes. Pressure is held constant during B, and volume is constant during D. An engine run from A->B->C->D->... What is the efficiency of this engine (in terms of V1/V2)?
Homework Equations
[tex]p{ V }^{ \gamma }=const.\\ W=\int { PdV } \\ efficiency=\frac { W }{ { Q }_{ in }^{ } } [/tex]
The Attempt at a Solution
This is a problem I encountered in an exam. I labeled all points with P1,P2,P3,V1,V2,V3. The work done is the area enclosed in the picture. Heat absorbed is (work done in B) + (internal energy gained in B). But I can't write the answer with only V1/V2. I am wondering whether there is an answer.