Abstract:
The objectives of this research were to study the performance and emissions of Dimethyl Ether (DME)-Diesel as dual fuel on a four-stroke single cylinder diesel engine compared with using diesel. For this research, a four-stroke single cylinder diesel engine Yanmar TF90 DI-L was modified to the DME-Diesel dual fuel engine. For the engine testing, the dual fuel engine was connected to the "P-1.5 ANAKA STYLE DYNAMOMETER" engine dynamometer and the exhaust gas analyzer. The engine test was conducted through 2500 rpm to 1200 rpm at full load condition and the flow rate of DME was set at constant 5 liter/min at pressure of 1 bar for supplying into the dual fuel engine. The engine performance such as engine torque, engine power, break specific fuel consumption and thermal efficiency of the engine and the emissions of the engine such as Nitrogen Oxide (NOX), Carbon Monoxide (CO) and Hydrocarbon (HC) were investigated during the test. The result revealed that the DME-Diesel dual fuel engine had maximum engine power and thermal efficiency of the engine higher than diesel. However the maximum torque and break specific consumption were lower than diesel. For the emissions, the DME-Diesel dual fuel emitted Nitrogen Oxide (NOX), Carbon Monoxide (CO) and Hydrocarbon (HC) higher than diesel.