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Exergy Analysis of Fluidized Desiccant Cooling System

Department of Thermodynamics, Theory of Machines and Thermal Systems, Wrocław University of Science and Technology, Wybrzeże Wyspianskiego 27, 50-370 Wrocław, Poland
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Entropy 2019, 21(8), 757; https://doi.org/10.3390/e21080757
Received: 6 June 2019 / Revised: 31 July 2019 / Accepted: 31 July 2019 / Published: 2 August 2019
(This article belongs to the Special Issue Thermodynamics of Heat Pump and Refrigeration Cycles)
One of the main challenges in the design and implementation of fluidized desiccant cooling (FDC) systems is increasing their low COP (coefficient of performance). Exergy analysis is one of the tools especially suitable for improvement and optimization of FDC systems. The improvement of performance is impossible as long as the main sources of exergy destruction are not identified and evaluated. In this paper, the exergy analysis was applied in order to identify these components and processes of the FDC system that are mainly responsible for exergy destruction. Moreover, the exergy efficiency of a simple fluidized desiccant cooler was determined. The results showed that fluidized beds and regenerative heat exchanger were the main exergy destruction sources with a 32% and 18% share of total exergy destruction, respectively. On the other hand, the direct evaporative cooler and air cooler placed after the desorbing fluidized bed were characterized by the lowest exergy efficiencies. This work contributes to better understanding of FDC operation principles and improvement of the performance of FDC technology. View Full-Text
Keywords: fluidized bed; desiccant cooling; adsorption; exergy destruction; exergy efficiency fluidized bed; desiccant cooling; adsorption; exergy destruction; exergy efficiency
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Rogala, Z.; Kolasiński, P. Exergy Analysis of Fluidized Desiccant Cooling System. Entropy 2019, 21, 757.

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