Studies On Multi Stage Evaporative Cooling For Thermal Comfort

Abstract

The present work is a modest attempt towards analyzing different aspects associated with newlinemulti stage evaporating cooling for providing thermal comfort in buildings. newlineThe importance of this research work is to focus the application of multistage evaporative newlinecooling system in Indian climate for thermal comfort in buildings leading to newlineenvironmental protection by reducing the CFC level and depletion of ozone layer. For the newlinebenefit of the society, the evaporative cooling may be suitable alternative of newlineconventionally used vapor compression cooling technique. newlineExperimental studies on evaporative cooling pads made of different materials are newlinepresented. Cooling pads of two different configurations called as Type-1 (25 gram fibers) newlineand Type-2 (50 gram fibers) using two new materials e.g. Palash and Coconut fibers and newlinetwo conventionally used materials e.g. Aspen and Khus fibers were prepared and tested. newlineSaturation effectiveness was calculated and compared for different pad materials. The newlinepresent study shows that the performance of coconut fibers pad is comparable with that of newlineaspen pad. Khus pad was found to be less effective than all other pads tested. Palash (new newlinematerial) showed highest saturation effectiveness. Heat and mass transfer coefficients for newlinefour different pad materials were also calculated and the correlations for saturation newlineeffectiveness of evaporative cooling pads were developed. A regenerative cooler was newlinedesigned, fabricated and tested in the laboratory. Effectiveness and COP of the newlineregenerative evaporative cooler were computed. newlinePerformance of indirect evaporative cooler (IEC) and combined indirect-direct newlineevaporative cooler (IDEC) has been assessed in different climatic zones of India. Effect newlinevi newlineof change of effectiveness of direct evaporative cooler and heat exchanger on the newlineperformance of indirect evaporative cooler has been carried out and compared. newlineAn analytical evaluation of the energy saving potential of an indirect evaporative cooler newline(IEC) and combination of indirect-direct evaporative cooler (IDEC) in