Evaluation of solid-desiccant-based evaporative cooling cycles for typical hot and humid climates

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Date
1995
Authors
Jain, S
Dhar, P L
Kaushik, S C
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Abstract
This paper presents an evaluation of various solid desiccant cycles for air conditioning in hot and humid climates. Psychrometric evaluation of potential cycles for 16 typical Indian cities has been carried out with the objective of achieving standard comfort conditions in the room. Computer simulation is based on constant effectiveness of heat exchangers and evaporative coolers and actual performance data of a commercially available desiccant wheel dehumidifier. The influence of various outdoor conditions, the effectiveness of heat exchangers/evaporative coolers on the cooling coefficient of performance and volumetric air flowrate per unit cooling capacity have been investigated. It is found that amongst ventilation, recirculation and Dunkle cycles, the Dunkle cycle is better for a wide range of outdoor conditions. However, cycles using wet surface heat exchangers give even higher performance.
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Keywords
desiccant cooling cycles;, computer simulation;, evaporative cooling systems;, air conditioning, dehumidification;, adsorption
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