Title: Thermodynamic analysis and multi-parametric optimisation of double effect absorption chiller

Authors: N. Ben Ezzine, Kh. Mejbri, M. Barhoumi, A. Bellagi

Addresses: Unite de Recherche Thermique et Thermodynamique des Procedes, URTThP, Ecole Nationale d'Ingenieurs de Monastir, E.N.I.M., Avenue Ibn ElJazzar, 5019 Monastir, Tunisia. ' Unite de Recherche Thermique et Thermodynamique des Procedes, URTThP, Ecole Nationale d'Ingenieurs de Monastir, E.N.I.M., Avenue Ibn ElJazzar, 5019 Monastir, Tunisia. ' Unite de Recherche Thermique et Thermodynamique des Procedes, URTThP, Ecole Nationale d'Ingenieurs de Monastir, E.N.I.M., Avenue Ibn ElJazzar, 5019 Monastir, Tunisia. ' Unite de Recherche Thermique et Thermodynamique des Procedes, URTThP, Ecole Nationale d'Ingenieurs de Monastir, E.N.I.M., Avenue Ibn ElJazzar, 5019 Monastir, Tunisia

Abstract: A mathematical simulation model based on the mass and the energy balances as well as the second law, a thermodynamic analysis and a multi-parametric optimisation of an ammonia-water double effect absorption chiller are performed. Exergy analysis is performed to show how the double effect technique allows the reduction of the total exergy loss in the single effect machine and enhances its performances. The search of the optimal operating conditions corresponding to the global maximum of the COP is performed by a numerical simulation of two multi-parametric techniques: the experimental designs and the simplex methods. The two methods converge towards the same maximum.

Keywords: thermodynamic analysis; simulation; double effect absorption chillers; exergy analysis; experimental design; multi-parametric optimisation; absorption heat pumps; ammonia; water.

DOI: 10.1504/IJEX.2006.008326

International Journal of Exergy, 2006 Vol.3 No.1, pp.68 - 86

Published online: 04 Dec 2005 *

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