Lect20ThrottDevHeatExchME200Div2&5SP2012

Lect20ThrottDevHeatExchME200Div2&5SP2012 - ME 200...

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ME 200: Thermodynamics I Lecture 20: Heat Exchangers, Mixing Chambers, and Throttling Valves
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Last Lecture Application of First Law of Thermodynamics » Turbines – specific volume increases; net work output » Compressors – specific volume decreases; net work input » Pumps » Heat transfer and PE almost always negligible for turbines and compressors; may need to consider KE
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This Lecture Applications of First Law of Thermodynamics » Heat Exchangers » Mixing Chambers » Throttling Valves
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Heat Exchangers A heat exchanger is a steady-flow engineering system used to transfer heat from one stream of fluid to another stream of fluid No work device - mechanical or other forms Heat transfer with surroundings is minimized by using insulation; this of course depends on how you draw your control volume PE and KE changes usually negligible
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Tube-Within-a-Tube Heat Exchangers Counterflow Parallel Flow 0 CV CV dE Q dt  CV W 2 2 i ii ee i i ie V mh m gz       2 2 e i V mg z 
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This note was uploaded on 02/22/2012 for the course ME 200 taught by Professor Gal during the Spring '08 term at Purdue.

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Lect20ThrottDevHeatExchME200Div2&5SP2012 - ME 200...

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