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Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis
Absorption cooling 2/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis
Absorption cooling Mechanical Engineering ME462/562 Sustainable - - PowerPoint PPT Presentation
Absorption cooling Mechanical Engineering ME462/562 Sustainable - - PowerPoint PPT Presentation
ME 562: Sustainable Energy an Exergy Analysis Spring 2014 Absorption cooling Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis the Einstein-Szilard refrigerator Mechanical Engineering ME462/562 Sustainable
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Absorption cooling 3/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis
How it works – single effect
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Absorption cooling 4/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis
How it works – double effect
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Absorption cooling 5/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis
Process schematic
Cooling water from cooling tower / swimming pool Cooling water from cooling tower / swimming pool Chilled water serving cooling load Hot water/glycol from solar or waste heat source dilute LiBr solution concentrated LiBr solution water hot water vapor cold water vapor
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Absorption cooling 6/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis
Schematic – with temperatures
Cooling water from cooling tower / swimming pool Cooling water from cooling tower / swimming pool Chilled water serving cooling load Hot water/glycol from solar or waste heat source dilute LiBr solution concentrated LiBr solution water hot water vapor cold water vapor 27.0 oC 30.8 oC 10.0 oC 16.0 oC 34.8 oC 27.0 oC 100.0 oC 100.0 oC 91.5 oC 80.0 oC 7.0 oC 40.0 oC 7.0 oC 40.0 oC 52.0 oC 80.0 oC 67.6 oC
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Absorption cooling 7/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis
Thermodynamic states
?
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Absorption cooling 8/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis
Exergy fmows
Cooling water from cooling tower / swimming pool Cooling water from cooling tower / swimming pool Chilled water serving cooling load Hot water/glycol from solar or waste heat source dilute LiBr solution concentrated LiBr solution water hot water vapor cold water vapor 0.0209 kW 0.1745 kW 0.7345 kW 0.2608 kW 23.695 kW 18.928 kW 0.4953 kW
- 0.8080 kW
0.113 kW 0.113 kW 6.475 kW 10.652 kW 14.716 kW 11.045 kW 0.0209 kW 0.4941 kW
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Absorption cooling 9/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis
Exergy destruction
Cooling water from cooling tower / swimming pool Cooling water from cooling tower / swimming pool Chilled water serving cooling load Hot water/glycol from solar or waste heat source dilute LiBr solution concentrated LiBr solution water hot water vapor cold water vapor 0.0209 kW 0.1745 kW 0.7345 kW 0.2608 kW 23.695 kW 18.928 kW 0.4953 kW
- 0.8080 kW
0.113 kW 0.113 kW 6.475 kW 10.652 kW 14.716 kW 11.045 kW 0.0209 kW 0.4941 kW
Condenser 0.2287 kW Generator 0.6617 kW Evaporator 0.4473 kW Absorber 2.895 kW HX
- 0.507 kW
???
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Absorption cooling 10/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis
A comparable electric chiller
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Absorption cooling 11/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis
Performance vs. heat source T
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Absorption cooling 12/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis
Performance vs. CHW T
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Absorption cooling 13/12 Mechanical Engineering ME462/562 Sustainable Energy: an Exergy Analysis