Aeration simulation of stored paddy by integrating desiccant tray unit into grain ventilation system

Abstract

This research work suggested a method of reducing grain bulk temperature and avoiding moisture transfer in a storage bin during aeration of stored grain by using a desiccant tray unit. Air humidity was adsorbed by the desiccant unit and then reduced subsequently before entering the grain silo. The simulation program was developed based on the AERO program and the model of desiccant tray which assist users in the prediction of grain temperature and moisture content. According to the ambient air condition, the number of trays would be suitably calculated for storage conditions in humid tropical regions. The simulated result showed that 2 desiccant trays (3.5 kg of silica gel per tray) were appropriate for controlling air temperature and humidity of 18 tons of grain stored in a cylindrical silo at lower than 28 oC and 80% RH.

Keywords

• simulation
• aeration
• silica gel
• paddy
• silo