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Le08 - ME 200 Thermodynamics I Lecture 8 Energy analysis of...

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ME 200: Thermodynamics I Lecture 8: Energy analysis of cycles Reading: Sections 2.6; SP8, 2.75, 2.82 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 , [email protected] 9/10/2010 1 ME200 Therm I Lecture 08, Prof. Mongia
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2 http://www.whitedoglubes.com/images2/4strokecycle.jpg http://www.epamact.tennessee.edu/rice/images/Four_stroke_cycle_c ompression.jpg 4-stroke IC Engine Cylinder
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9/10/2010 ME200 Therm I Lecture 08, Prof. Mongia 3 http://www.rcvengines.com/images/pr/the-rotating-cylinder-valve4-stroke-engine-cycle.jpg
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9/10/2010 4
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1,2,3,1 (D KE + D PE + D U = Q-W) i-j =0 1,2,3,1 W i-j = 1,2,3,1 Q i-j W cycle = Q cycle Second law of thermo: W cycle < Q cycle 9/10/2010 5 ME200 Therm I Lecture 08, Prof. Mongia
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Power cycles: Net work Output Refrigeration & heat pump cycles: Net work input 9/10/2010 6 ME200 Therm I Lecture 08, Prof. Mongia
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Higher value heat source Lower value heat rejection
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