Energy Enginering of Hybrid Dryer System based of Exhaust Gases and LPG Integarated with Rice Milling Unit

摘要

The purpose of this paper is to calculate an energy engineering of hybrid dryer based of exhaust gases and LPG, integrated with rice milling unit using a cogeneration system for utilization diesel engine exhaust gas temperature at the power plant of rice milling unit for paddy drying process and LPG burners. The method used is to measure the temperature and mass flow rate of the exhaust gas of a diesel engine and capacity of dryer for calculating heat exchanger design. Results of measurements at 120 kVA diesel engine exhaust gas temperature at 357 ??C and the mass flow rate 636 kg/h. From the calculation results, power that can be generated by the exhaust gases are 56 kW and heat required for drying are 24 kW/ton. The total grain can be dried is 2 tons. Selection of LPG burners adjusted to results of the calculation of the energy need for drying capacity of 1 to 2 tons is gas burners wich can operate in the power range 23 kW to 58 kW. The use of LPG burner only when the drying process is still underway and the rice milling process has stopped operating before drying target is reached. This study shows that the exhaust gas of a diesel engine can be applied to the dryer with a cogeneration system.