Uji Performansi Alat Pengering Efek Rumah Kaca Hybrid Tipe Rak Berputar untuk Bawang Merah (Allium Cepa L.)

Drying is the most important step of shallot processing before it is consumed. Generally, the farmer dried shallot by spreading it on the ground under the sun, however sun drying could not be implemented at rainy season, therefore the mechanical dryer is necessary. The research introduced the rotary tray hybrid green house effect (GHE) solar dryer for shallot drying. The objective of the study was to test the performance of the rotary rack of the GHE hybrid solar dryer for shallot drying. Three drying experiments has been done to got the performance of the Rotary rack type-hybrid GHE solar dryer. The dryer has drying efficiency of 20.8 % and the energy consumed of 12.1 MJ/kg vapor evaporated. Base on the cost analysis, it was obtained that the drying cost was Rp 1,013,- per kg fresh shallot. The shallot drying bussiness is feasible with payback period of 4 years. Volatile reducing substances (VRS) of dried shallot was 31.1 μg eq/g which has no significant decrease compared with fresh shallot. GHE solar dryer -hybrid of solar and biomass energy- utilization for shallot drying is still useful when the solar irradiation is unavailable for sun drying. It could reduce losses caused of decay of shallot