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  4. Advanced performance of an open desiccant cycle with internal evaporative cooling
 
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2014
Journal Article
Title

Advanced performance of an open desiccant cycle with internal evaporative cooling

Abstract
An enhanced evaporatively cooled open sorption cycle which can be driven by solar thermal heat is presented as an environmentally benign alternative to conventional air conditioning cycles. Experimental data of the core component - the desiccant coated heat exchanger - cooled by water evaporation are given. This evaporation of water in the heat exchanger leads to an increase in adsorbed water mass by 46% and an enhancement of the cooling capacity by factor 4.1 when compared to a solely air cooled process. By simulation analysis, the recently designed heat exchanger is then compared to data of an air cooled open sorption process published in earlier research. Measurement data of this earlier research are analysed with a dynamic model. It is demonstrated that only a fraction of the dry desiccant mass was actively cycled in the earlier prototype. Simulation of the evaporatively cooled current prototype underlines the enhanced performance that can be achieved with the new concept and prototype design.
Author(s)
Bongs, Constanze  
Morgenstern, Alexander  
Lukito, Y.
Henning, Hans-Martin  
Journal
Solar energy  
DOI
10.1016/j.solener.2013.07.022
Language
English
Fraunhofer-Institut für Solare Energiesysteme ISE  
Keyword(s)
  • Thermische Anlagen und Gebäudetechnik

  • Solarthermie

  • Solare Kälteerzeugung

  • adsorption

  • desiccant

  • sorption

  • coated heat exchanger

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