Cooling load and coefficient of performance optimizations for real air-refrigerators

Youming Tu, Lingen Chen, Fengrui Sun and Chih Wu

Applied Energy, 2006, vol. 83, issue 12, 1289-1306

Abstract: Based on a simple irreversible variable-temperature heat reservoir air (Brayton) refrigeration cycle model, a performance analysis and optimization of a real air refrigerator is carried out using finite-time thermodynamics. To maximize the cooling load and the coefficient of performance (COP) of the cycle, the allocation of a fixed total heat-exchanger inventory and thermal-capacity rate matching between the working fluid and heat reservoirs are optimized, respectively. The influences of pressure ratio, the total heat-exchanger inventory, the efficiencies of the compressor and expander, the thermal capacity rate of the working fluid and the ratio of the thermal-capacity rates of the heat reservoirs on the performance of the cycle are shown by numerical examples. The results obtained provide guidances for the design of practical air-refrigeration plants.

Keywords: Finite-time; thermodynamics; Irreversible; air-refrigeration; cycle; Cooling; load; COP; Generalized; thermodynamic; optimization (search for similar items in EconPapers)
Date: 2006
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Citations: View citations in EconPapers (2)

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