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Lecture 18 PES Su 2011 annotated

Lecture 18 PES Su 2011 annotated - ME 200 Thermodynamics I...

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ME 200: Thermodynamics I Lecture 18: More 1 st Law Open System Analyses Prof. Sojka Summer 2011
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5 July 2011 ME 200 2 In this Lecture … We will perform more 1 st Law open system device analyses
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3 Rotating Machinery Rotating machinery: turbines , compressors , and pumps . Turbines Compressors and pumps ME 200 5 July 2011
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ME 200 4 Rotating Machinery A turbine is a steady- flow device used to produce mechanical work ( W ) from the fluid (flow work). The fluid drives rotating blades while the υ increases from inlet to exit as the working fluid expands (or the p drops). 5 July 2011
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ME 200 5 Turbines 5 July 2011
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ME 200 6 Turbines Fluid expanding as it passes the blades imparts a force on the blades, which in turn produces a torque on the shaft causing rotation. 5 July 2011
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ME 200 7 Rotating Machinery A compressor is a steady-flow device that consumes shaft work from rotating blades and in turn compress the fluid. υ decreases from inlet to exit as the working fluid is compressed and the pressure rises .
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