A Review Paper on Design, fabrication and experimental investigation of solar hybrid dryer with biomass burner for farmers

Abstract

Solar-biomass hybrid dryer systems is primarily set to use this burners which is a supporting source of heat
to raise the temperature of the air prior to charging it in the drying chamber. The flue gases are produced from biomass
combustion. They have a considerable amount of heat and are exhausted into the atmosphere. This paper presents a new
approach that uses the co-generation (Co-Gen) technique in utilizing the flue gas exhausts from the burner. This approach
enhances the circulation of warm air in the drying chamber and eliminates the need for an extraction fan. The exhaust gas
mixtures are fed inside the chimney at the upper side part to raise the natural stack effect caused by the increase in
temperature and decrease in pressure. This technique might not be theoretically proven but it was successfully performed
and proven experimentally; the dryer is tested with and without Co-Gen by drying red chili. it is observed that efficiency of
the biomass mode system with Co-Gen is raised by 5.7%.
Along with the increase in the efficiency, the most advantage of this approach is that it is eliminating the electricity, as long
as the Co-Gen technique replaces the electrical extractor. This benefit will make the hybrid solar drying applicable in rural
and remote areas.