A thermodynamic performance analysis was performed on a novel cooling and power cycle that combines a semiclosed gas turbine called the high-pressure regenerative turbine engine (HPRTE) with an absorption refrigeration unit. Waste heat from the recirculated combustion gas of the HPRTE is used to power the absorption refrigeration cycle, which cools the high-pressure compressor inlet of the HPRTE to below ambient conditions and also produces excess refrigeration depending on ambient conditions. Two cases were considered: a small engine with a nominal power output of and a large engine with a nominal power output of . The cycle was modeled using traditional one-dimensional steady-state thermodynamics, with state-of-the-art polytropic efficiencies and pressure drops for the turbomachinery and heat exchangers, and curve fits for properties of the LiBr-water mixture and the combustion products. The small engine was shown to operate with a thermal efficiency approaching 43% while producing 50% as much refrigeration as its nominal power output (roughly ) at ambient conditions. The large engine was shown to operate with a thermal efficiency approaching 62% while producing 25% as much refrigeration as its nominal power output (roughly ) at ambient conditions. Thermal efficiency stayed relatively constant with respect to ambient temperature for both the large and small engines. It decreased by only 3–4% as the ambient temperature was increased from in each case. The amount of external refrigeration produced by the engine sharply decreased in both engines at around , eventually reaching zero at roughly in each case for refrigeration. However, the evaporator temperature could be raised to (or higher) to produce external refrigeration in ambient temperatures as high as .
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June 2008
Research Papers
Performance of a Novel Semiclosed Gas-Turbine Refrigeration Combined Cycle
Joseph J. Boza,
Joseph J. Boza
Naval Warfare Center
, 110 Vernon Avenue, Panama City, FL 32407
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William E. Lear, Ph.D.,
William E. Lear, Ph.D.
Department of Mechanical and Aerospace Engineering,
University of Florida
, P.O. Box 116300, 232 MAE Building B, Gainesville, FL 32611-6300
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S. A. Sherif, Ph.D.
S. A. Sherif, Ph.D.
Fellow ASME
Department of Mechanical and Aerospace Engineering,
e-mail: sasherif@ufl.edu
University of Florida
, P.O. Box 116300, 232 MAE Building B, Gainesville, FL 32611-6300
Search for other works by this author on:
Joseph J. Boza
Naval Warfare Center
, 110 Vernon Avenue, Panama City, FL 32407
William E. Lear, Ph.D.
Department of Mechanical and Aerospace Engineering,
University of Florida
, P.O. Box 116300, 232 MAE Building B, Gainesville, FL 32611-6300
S. A. Sherif, Ph.D.
Fellow ASME
Department of Mechanical and Aerospace Engineering,
University of Florida
, P.O. Box 116300, 232 MAE Building B, Gainesville, FL 32611-6300e-mail: sasherif@ufl.edu
J. Energy Resour. Technol. Jun 2008, 130(2): 022401 (11 pages)
Published Online: May 16, 2008
Article history
Received:
January 13, 2004
Revised:
October 22, 2007
Published:
May 16, 2008
Citation
Boza, J. J., Lear, W. E., and Sherif, S. A. (May 16, 2008). "Performance of a Novel Semiclosed Gas-Turbine Refrigeration Combined Cycle." ASME. J. Energy Resour. Technol. June 2008; 130(2): 022401. https://doi.org/10.1115/1.2906034
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