Utilization Heat Energy from Geothermal Hot Spring Water for Agriculture Drying Process in Bakan Village, North Sulawesi

Abstract

Traditionally drying proccess for agriculture products in Bakan Village, Bolaang Mongondow, North Sulawesi often constrained in rainy days. The devices of heat exchanger Fin and Tube type was installed in the field. It is used to extract heat from geothermal hot spring water for drying process of agricultural product. Heat energy contained in the hot water geothermal manifestation in the Bakan Village, subdistrict Modayag, Bolaang Mongondow, North Sulawesi can be utilized directly for drying agriculture products such as cacao, coconut etc. Heat energy of 176.94 kJ/s which is released by hot spring with 2,1585 kg/s discharge and temperature of 80oC which is passed into heat exchanger can raise the temperature of the drying chamber from 32oC to 50 oC. The results of measurements and observation in the field shows that the average efficiency of this device is about 76%. Drying by using this device can reduces wet weight of the material of about 30% in average.