Abstract
A mathematical model for predicting the performance of a desiccant wheel with purge sector has been used and heat and mass transfer for both moist air and the desiccant material have been considered. The model shows a good agreement with experimental results. Several studies have been done on using of purge sector in desiccant wheel. This paper also analyses the effect of purge sector by utilizing the output of purge air in regeneration and conduct a comparative performance analysis in both the directions of rotation (clockwise and anticlockwise) of desiccant wheel. It was found that for all the cases considered in this study like rotation of wheel, regeneration temperature, velocity and ambient moisture, the performance parameter results better in anticlockwise direction as compared to clockwise direction of rotation of the desiccant wheel. Mainly at low rph and low regeneration temperature effect of direction on the performance is more but at low ambient moisture and low velocity effect is less.
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