Performance Analysis of Combined Humidification Dehumidification (HDH) System Coupled with Air Conditioning System /

Abstract

Humidification Dehumidification (HDH) systems are being used for small scale freshwater production using low grade heat source. For air conditioning applications vapor compression system is a widely used system. Analysis of Combined System humidification dehumidification (HDH) system coupled with vapor compression system through an enthalpy exchanger has been performed for different climate regions and several performance parameters has been studied for optimizing the performance of HDH system and to provide conditioned space at lower power consumption. Along with energy analysis exergy analysis has been performed for the components in vapor compression system. Results shows that combined system shows promising power savings for hotter regions where average summer temperature is greater than 35℃. For hotter regions combined system shows up to 20% reduction in input power. Along with reduced input power combined system shows 30% increased productivity for freshwater production. Results indicate that an average of 10l/h of freshwater production can be obtained from combined system. Exergy analysis shows that combined system shows average less exergy destruction in hot regions with a small increase in irreversibility ratio for enthalpy exchanger. Thus, combined system can be used effectively for hot regions for providing conditioned space and fresh water a product.