Lecture19_Heat_exchangers_throttling_devices-handout[1]

Lecture19_Heat_exchangers_throttling_devices-handout[1] - 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 : ebae@purdue.edu Phone : 765-494-6849 Course website : http://engineering.purdue.edu/ME200 ME200 : Thermodynamics I Lecture 19 : Heat exchangers & throttling device 2 Outline Heat exchangers Throttling device Examples 3 Heat exchangers - Device for transferring heat from one fluid to another - Heating/cooling system, automotive (radiator) - CPU heat sink 4 Modeling -Typical assumption - - - - Q 5 Modeling Energy balance Mass balance ?? ? ? = ? ? = 0 Q 0 = + ? (? ? ) + ( 2 2 ) + ( ) 6 Throttling device - Throttle :To produce decrease in the pressure via introducing restriction to the flow. -> partially open valve or porous plug - Ex : in refrigeration system valve is introduced to - P1 and P2 are up and down stream Pressure P1 P2 P1>P2; Decrease in P 7 Modeling -Typical assumption - - - -...
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Lecture19_Heat_exchangers_throttling_devices-handout[1] - 1...

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