A Tutorial on Thermodynamics - University of Illinois at Urbana ...

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Why not use more air cooling? Efficiency suffers: 0.1% per degree C. Air temperature is not always as cold asavailable water. Worse in hot/climates wheremore air-conditioning is needed. Additional thermal resistance because heattransfer is not as effective: basic property ofeffusivity (square root of the product ofthermal conductivity and heat capacity perunit volume) is smaller by a factor of 100. Trade-off: do you want to reduce use ofH 2 O or CO 2 emission?Mark A. Shannon http://watercampws.uiuc.edu8
Why not use more air cooling? Combined cycle (natural gas powered)saves water and reduces CO 2 relative tocoal.cogenertion.netMark A. Shannon http://watercampws.uiuc.edu9
Page 3 and 4: Second Law of ThermodynamicsSourceT
Page 5 and 6: Cooling requirements inpower genera
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Page 11 and 12: Thermodynamics of water purificatio
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Page 15 and 16: Thermodynamic limits for a distilla
Page 17: But maybe sometimes heat is free, i

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