Development of dryer for agricultural and pharmaceutical products
2000
Chanakan Asasutjarit | Prasit Tapananont | Boonchu Leelakajohnjit | Yongyuth Imratana | Sidthinarong Sudthisa-ard | Thanarat Intasarn | Porapol Pinthong | Somwang Songhong | Chatuphon Uthaisri | Vinai Jatanakul | Vichian Grajang | Chainarong Suwannawong | Booncherd Praseartphong | Lilit Ditsorn | Pramruth Chalermpak | Chumporn Tharworn | Boonsiri Srisaracam
Objective of this research was to study the technical feasibility of agricultural and pharmacy dryer to dry banana. The design, construction and performance test of dryer were conducted prior to technical and economic analyses. The air mass flow rate through the dryer can be controlled by using 760 W of blower and 13.8 kW heater. The size of a cabinet was 0.65 m*4.5 m*1.2 m and was able to contain 7 trolleys with the dimension of 0.64 m*0.64 m*1 m each. Each trolley could contain 9 trays with the dimension of 0.63 m*0.63 m*0.025 m. The operating parameters affecting product quality were temperature and air mass flow rate. The optimum condition for drying 200 kg bananas at initial moisture content of 76.53 and 75.11 percent wb was at air mass flow rate of 0.2 kg/s, average temperature in the cabinet at 54.42, 59.57 degree celsius, with drying time of 34 hr and 38 hr. The final product contained 17.77 and 17.60 percent wb moisture content. The efficiency and energy consumption of the system were 15.68 percent and 12.51, 15.31 MJ/kgH2O evap. respectively. Investment cost to evaporate 1 kg water from bananas using the dryer was 32.83 baht/kgH2O evap. at the life cycle of 10-year operation.
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