Lecture33_Heat transfer and work for internally-handout

Lecture33_Heat transfer and work for internally-handout - 1...

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Unformatted text preview: 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 33 : Heat transfer and work for internally reversible process 2 Outline Heat transfer for internally reversible process Work for internally reversible process Examples 3 Heat transfer - Let’s look at Q and W in the absence of internal irreversiblities - Let’s assume one-inlet one outlet control volume at steady state - Definition : comparison between idealized efficiency and actual efficiency - Identify the source or lower efficiency (irreversibilites) to maximize the actual efficiency. 4 Heat transfer ? ? = (¡ 1 −¡ 2 ) ⇒ T s - int. rev remind us that it is applicable for Reversible systems 5 Work In Lecture 5, we learned for closed system work ? = ? ¡¢? 2 1 Assuming qausi-equilibrium process If we assume no friction = internally reversible process P V isothermal For a unit pressure change (ΔP) which phase requires more work? Gas or liquid? 6...
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This note was uploaded on 12/11/2011 for the course ME 200 taught by Professor Gal during the Fall '08 term at Purdue.

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Lecture33_Heat transfer and work for internally-handout - 1...

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