Dissertation/Thesis Abstract

Comparison of waste heat driven and electrically driven cooling systems for a high ambient temperature, off-grid application
by Horvath, Christopher P., M.S.M.E., University of Maryland, College Park, 2012, 106; 1533887
Abstract (Summary)

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.

Indexing (document details)
Advisor: Radermacher, Reinhard
Commitee: Jackson, Gregory, Yang, Bao
School: University of Maryland, College Park
Department: Mechanical Engineering
School Location: United States -- Maryland
Source: MAI 51/04M(E), Masters Abstracts International
Source Type: DISSERTATION
Subjects: Mechanical engineering, Energy
Keywords: Absorption system, Chp, Energy efficiency, Fuel savings, Libr/h2o, Off-grid
Publication Number: 1533887
ISBN: 9781267923295
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