Analysis
Process detail
Process
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Process name
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Equipment
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Q,W constant property
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1-2
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Isentropic expansion
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Turbine
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+wT , q=0,
s = constant : s1=s2
|
2-3
|
Heat rejection
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Condenser
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-q, w = 0,
P = constant :
|
3-4
|
Isentropic compression
|
Pump
|
-wp , q=0,
s = constant
|
4-1
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Heat Addition
|
Boiler
|
+q, w = 0,
P = constant
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Assumption SSSF, neglect ΔKE, ΔPE
Work and efficiency in Cycle
Isentropic efficiency = wa(actual) / wisentropic (isentropic efficiency)
wT = h1-h2 (isentropic work)
wa (actual) = 0.92 (h1-h2) (92% isentropic efficiency)
wnet = wa(actual) - wp = qH - qL
Thermal effciency = wnet / qH (Thermal efficiency)
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