Abstract
This article presents the experimental studies on a natural convection solar drier integrated with a biomass back-up heater. Experiments have been conducted to test the drying performance of coconut under (1) a solar green house dryer integrated with a biomass back-up heater, (2) a biomass heater, (3) a solar green house dryer, and (4) open sun drying. It is found that to reduce the moisture content from 53.4 to 9.2% for drying coconut requires 26 h in a combined solar green house dryer coupled with a biomass back-up heater, 30 h in a biomass heater mode, 44 h in a solar green house dryer, and 88 h in open sun drying. Drying efficiency of the solar drier was estimated to be about 19%.
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