Development of Biogas-Diesel Engine for Farm Use (Part 4)

Robustness of Optimized Biogas Supply Schedule

Abstract

To increase the efficiency of the biogas-diesel dual fuel engine by heat recovery from an engine coolant and an exhaust gas, a co-generation system (CGS) was developed. An gas heat exchanger of a double-tube and parallel flow type are adopted considering the easiness of manufacturing and system modeling. As a result of the experiment, the heat exchanger could collect more quantity of heat than that raised from the simulation. As an additional merit of the heat exchanger, the heat efficiency of the engine also increases because the flow resistance of exhaust gas were decreased by contraction of gas volume. The total energy efficiency of the developed CGS is equal to 65%.