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Lecture22_Thermodynamic cycle and 2nd law-handout

Lecture22_Thermodynamic cycle and 2nd law-handout - ME200...

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1 Professor: Euiwon Bae Lecture Hours : MWF 1:30-2:20 in ME1130 Office Hours : MWF 2:30-3:30 in ME1091 Email : [email protected] Phone : 765-494-6849 Course website : http://engineering.purdue.edu/ME200 ME200 : Thermodynamics I Lecture 22 : Thermodynamic cycle and 2 nd law
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2 Outline 2 nd law of power cycles with Two reservoirs 2 nd law of Refrigeration and heat pump with Two reservoirs Examples
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3 2 nd Law of power cycles w/ Two reservoirs Using Kelvin-Planck statement : theoretical performance limitation From Lecture 8 η = ° ±²±³´ ? µ? = (? µ? −? ?¶· ) ? µ? = 1 − ? ?¶· /? µ? Q in and Q out are heat transfer from two thermal reservoirs W cycle = Q in - Q out T H (Hot) T c (Cold) W=Q in -Q out Qin Qout System
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4 2 nd Law of power cycles w/ Two reservoirs If Q out =0 (no heat transfer to the cold body) η = ° ±²±³´ µ ¶? = ¶? −µ ?·¸ ) µ ¶? = 1 ¹ ? º»¼ /? ½¾ = W cycle = Q in - Q out T H (Hot) T c (Cold) W=Q in -Q out Qin System Pump Boiler Turbine Condenser ? À
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5 2 nd Law of power cycles w/ Two reservoirs Can conclude two facts : Carnot corollaries 1.
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Lecture22_Thermodynamic cycle and 2nd law-handout - ME200...

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