Forward army bases in off-grid locations with high temperatures require power and cooling capacity. Each gallon of fuel providing electrical power passes through a complex network, introducing issues of safety and reliability if this network is interrupted. Instead of using an engine and an electrically powered cooling system, a more efficient combined heat and power (CHP) configuration with a smaller engine and LiBr/Water absorption system (AS) powered by waste heat could be used. These two configurations were simulated in both steady state and transient conditions, in ambient temperatures up to 52°C, providing up to 3 kW of non-cooling electricity, and 5.3 kW of cooling. Unlike conventional AS's which crystallize at high temperatures and use bulky cooling towers, the proposed AS's avoid crystallization and have air-cooled HXs for portability. For the hottest transient week, the results showed fuel savings of 34–37%, weight reduction of 11–19%, and a volumetric footprint 3–10% smaller.
|Commitee:||Jackson, Gregory, Yang, Bao|
|School:||University of Maryland, College Park|
|School Location:||United States -- Maryland|
|Source:||MAI 51/04M(E), Masters Abstracts International|
|Subjects:||Mechanical engineering, Energy|
|Keywords:||Absorption system, Chp, Energy efficiency, Fuel savings, Libr/h2o, Off-grid|
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