합성가스/디젤 혼소압축착화 엔진의 합성가스 혼합비와 압축비에 따른 연소 및 배출가스 특성 = Syngas/Diesel Dual Fuel Combustion in a Compression Ignition Engine with Different Composition Ratios of Syngas and Compression Ratios

다국어 초록 (Multilingual Abstract)

Syngas is widely produced by incomplete combustion of coal, water vapor, and air (oxygen) in a high-temperature/highpressure gasifier through a coal-gasification process for power generation. In this study, a simulation syngas which was mainly composed of H2, CO, CO2, and N2 was fueled with diesel. A modified single cylinder compression ignition (CI) engine is equipped with intake port syngas supply system and mechanical diesel direct injection system for dual fuel combustion.
Combustion and emission characteristics of the engine were investigated by applying various syngas composition ratios and compression ratios. Diesel fuel injection timing was optimized to increase indicated thermal efficiency (ITE) at the engine speed 1,800 rpm and part load net indicated mean effective pressure (IMEPnet) 2 to 5 bar. ITE of the engine increased with the H2 concentration, compression ratio and engine load. With 45% of H2 concentration, compression ratio 17.1 and IMEPnet 5 bar, ITE of 41.5% was achieved, which is equivalent to that of only diesel fuel operation.

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