Abstract
In the present investigation, a natural convection dryer has been designed for the grain drying process. The designed dryer consist of a conical biomass burner, rectangular chamber, PCM tray, drying chamber, and an exhaust pipe. This dryer is developed mainly for small-scale farmers in the village area of the under-developed countries, where electricity is not available. In the present study, the performance analysis of the dryer has been investigated for the paddy drying process. During the study, the variations of temperature and exergy in the rectangular chamber, PCM tray, and drying chamber with time have been analyzed. The variations in the moisture content of paddy have also been plotted in the study. During the study, 10 kg of paddy of moisture content 33% was dried to the final moisture content of 14.6%. In this investigation, 7.5 kg of biomass (wood) is burnt in three hours and after 1 h of the initiation of biomass burning, paddy was loaded on the tray.
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