2300_les23 - VII Power and Refrigeration Cycles C The...

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1 Lesson 23, Geof Silcox, Chemical Engineering, University of Utah VII. Power and Refrigeration Cycles C. The Carnot Power Cycle for an Ideal Gas 1. Description •1-2 reversible, isothermal expansion •2-3 reversible, adiabatic expansion •3-4 reversible, isothermal compression •4-1 reversible, adiabatic compression T H = constant T L = constant Q H Q L 1 2 3 4 W net,out Q 41 =0 Q 23 =0 P v T s T H T L 1 2 3 4 Q H Q L s 2 = s 3 s 4 = s 1 Lesson 23, Geof Silcox, Chemical Engineering, University of Utah VII. Power and Refrigeration Cycles 2. Analysis •1-2 rev., isothermal expansion •2-3 rev., adiabatic expansion •3-4 rev., isothermal compression •4-1 rev., adiabatic compression 1 2 H 2 1 H v v ln mRT W Q = = 4 3 L 4 3 L v v ln mRT W Q = = 0 Q 3 2 = 0 Q 1 4 = 1 2 H 4 3 L rev , th H L H out , net rev , th v v ln mRT v v ln mRT 1 Q Q 1 Q W = = = η η T H = constant T L = constant Q H Q L 1 2 3 4 W net,out Q 41 =0 Q 23 =0 P v
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