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Unformatted text preview: isentropic: Steps to solve Vapor Power cycle (general):-Given: T1, P1 and either P3 or T3-Find: all h’s-Use T1, P1 to look up h1 and s1-Since P2=P3 then s2=s3, look up h2-x3=0 (saturated liquid assumed usually) and P3 is given, then look up h3 which =h3 2 P3. Then find v3=vf-Since P4=P1, h4-h3=v2(P4-P3) and solve for h4-next compute W T , W P , Q in-get η If Pump and Turbine are not isentropic: Otto Cycle: 1→2 : Q12=0, s1=s2 2→3: Qin, V2=V3 3→4: Wout, Q34=0, s4=s3 4→1: V4=V1 Power: Displacement Volume: Compression Ratio: Useful calculations/short-cuts: Work: Efficiency: Mean Effective Pressure: Diesel Cycle: Work: Cut-off ratio:...
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- Spring '11
- Thermodynamics, exergy rate balance, Isentropic Eqns