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Entropy 2016, 18(3), 82; doi:10.3390/e18030082

Hierarchical Decomposition Thermodynamic Approach for the Study of Solar Absorption Refrigerator Performance

1
GEPEA-UMR CNRS 6144 Laboratory, École des Mines de Nantes, Energetic Systems and Environment Department, 4 Alfred Kastler Street BP 20722, 44307 Nantes, France
2
Applied Thermodynamics Research Unit (99/UR/11-21), National Engineering School of Gabès, Omar Ibn Elkhattab Street, 6029 Gabès, Tunisia
3
LAMIH CNRS UMR 8201, Department of Mechanics, Valenciennes University, Campus Mont Houy, F-59313 Valenciennes Cedex 9, France
4
LEMTA, CNRS UMR 7563, ENSEM-INPL, Université de Lorraine, 2 Avenue de la Forêt of Haye BP 160, 54504 Vandoeuvre-lès-Nancy, France
*
Author to whom correspondence should be addressed.
Academic Editor: Kevin H. Knuth
Received: 29 October 2015 / Revised: 16 February 2016 / Accepted: 16 February 2016 / Published: 4 March 2016
(This article belongs to the Special Issue Entropy Generation in Thermal Systems and Processes 2015)
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Abstract

A thermodynamic approach based on the hierarchical decomposition which is usually used in mechanical structure engineering is proposed. The methodology is applied to an absorption refrigeration cycle. Thus, a thermodynamic analysis of the performances on solar absorption refrigerators is presented. Under the hypothesis of an endoreversible model, the effects of the generator, the solar concentrator and the solar converter temperatures, on the coefficient of performance (COP), are presented and discussed. In fact, the coefficient of performance variations, according to the ratio of the heat transfer areas of the high temperature part (the thermal engine 2) Ah and the heat transfer areas of the low temperature part (the thermal receptor) Ar variations, are studied in this paper. For low values of the heat-transfer areas of the high temperature part and relatively important values of heat-transfer areas of the low temperature part as for example Ah equal to 30% of Ar, the coefficient of performance is relatively important (approximately equal to 65%). For an equal-area distribution corresponding to an area ratio Ah/Ar of 50%, the COP is approximately equal to 35%. The originality of this deduction is that it allows a conceptual study of the solar absorption cycle. View Full-Text
Keywords: solar absorption refrigerators; endoreversible model; hierarchical decomposition; coefficient of performance solar absorption refrigerators; endoreversible model; hierarchical decomposition; coefficient of performance
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Berrich Betouche, E.; Fellah, A.; Ben Brahim, A.; Aloui, F.; Feidt, M. Hierarchical Decomposition Thermodynamic Approach for the Study of Solar Absorption Refrigerator Performance. Entropy 2016, 18, 82.

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