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Optimization of a heat assisted air-conditioning system comprising membrane and desiccant technologies for applications in tropical climates

Safizadeh, M. Reza; Morgenstern, Alexander; Bongs, Constanze; Henning, Hans-Martin; Luther, Joachim


Separating dehumidification and cooling loads in air-conditioning systems has been proven to be a potential strategy to reduce electricity consumption if the dehumidification of air is mostly performed by heat-powered system components. Referring to experimental experiences in Singapore, this paper presents a novel electricity-efficient air-conditioning system consisting of a membrane unit, an evaporatively cooled sorptive dehumidification system (called ECOS system) and a high-efficient conventional cooling unit. The dehumidification of air is performed by a combination of the membrane unit and the ECOS system, and the sensible cooling of air is accommodated by a high-efficiency conventional chiller and in part by the membrane device. In order to find an optimized balance of the three air-conditioning components, an optimization-based simulation approach using a genetic algorithm is developed. The optimization is based on a simple objective function that comprises operating and investment costs. The optimization results reveal that an integration of a relatively large membrane unit, a small ECOS unit and a chiller operating at an elevated evaporation temperature is the most cost effective combination meeting comfort criteria. ... mehr

DOI: 10.1016/
Zitationen: 12
Web of Science
Zitationen: 12
Zitationen: 12
Zugehörige Institution(en) am KIT Fakultät für Maschinenbau – Fachgebiet Strömungsmaschinen (FSM)
Institut Entwerfen und Bautechnik (IEB)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 0360-5442, 1873-6785
KITopen-ID: 1000068932
Erschienen in Energy
Verlag Elsevier
Band 101
Seiten 52–64
Schlagwörter Air-conditioning systems, Tropical climates, Membrane dehumidification, Solid desiccant dehumidification, System optimization
Nachgewiesen in Scopus
Web of Science
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