Le28-29 - ME 200: Thermodynamics I Lecture 28: Internally...

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ME 200: Thermodynamics I Lecture 28: Internally reversible processes, Closed system entropy balance Reading: Sections 6.6, 6.7; SP28, 6.21, 6.44, 6.66 Lecture 29: Entropy increase principle, Open system entropy balance Reading: Section 6.8-6.10.1; SP29, 6.82, 6.88 11/3/2010 1 ME200 Therm I Lectures 28-29, Prof. Mongia Professor Hukam Mongia Office Hours: MWF 9:30 to 10:30 AM in ME 83 Other times email for appointment; Phone: 765-494-5640 Course Website: https://engineering.purdue.edu/ME200/ Course Secretaries: Diana Akers (ME 84) and Marilyn Morrison (ME 100) Grader: Abhro Pal , abhro.pal@gmail.com
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Entropy Change in Internally Reversible Processes of Closed Systems d Q Entropy transfer accompanies heat transfer. Entropy : increases when Q into the system Decreases when Q from the system =0 in a thermally isolated internally reversible system isentropic process; Adiabatic for systems other than internally reversible system. 2 11/3/2010 ME200 Therm I Lectures 28-29, Prof. Mongia
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= Area under the curve For simple compressible system in quasi-static equilibrium conditions: = Area under the curve 3 11/3/2010 ME200 Therm I Lectures 28-29, Prof. Mongia Q S T
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Carnot Power Cycle 4 internally reversible processes Adiabatic Compression (W<0) Q=0 Isothermal Compression (W<0) D T=0 Isothermal Expansion W>0 D T=0 Adiabatic Expansion (W>0) Q=0 Isentropic W cycle = Q H -Q C 4 11/3/2010
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Entropy for Closed System
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This note was uploaded on 01/13/2011 for the course ME 200 taught by Professor Gal during the Fall '08 term at Purdue University-West Lafayette.

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Le28-29 - ME 200: Thermodynamics I Lecture 28: Internally...

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