190型热裂解生物质气发动机性能研究

为了解不同运行参数和不同材料的热裂解生物质气对发动机功率和有害排放物的影响,该文利用热裂解低热值生物质气作为大缸径非增压火花点火发动机的燃料,研究了生物质气发动机的动力性、经济性和排放性。试验数据表明:发动机全工况范围内稳定运行;发动机的燃烧速度较慢,点火提前角为BTDC32℃A时发动机燃烧效果最好;发动机的排放性较好,NO排放随负荷的增大而升高,HC和CO排放随负荷的增大而降低,随裂解气热值的增加NO排放升高。因此,低热值热裂解生物质气作为大缸径发动机的燃料可以实现发动机的稳定运行,并具有较好的经济性和排放性。

Performances of 190 engine fueled with thermal cracking biogas

The performance of the power, economy and emission of biogas engine were studied by experiment of large bore non-pressurized spark-ignition biogas engine using thermal cracking low heat value biogas as fuel. The effects of different operation parameters and different thermal cracking biogas on the power and harmful emissions of the engine were measured. The experimental data showed that the engine run stably in whole operating range, the combustion speed was low and the combustion was the best at BTDC32°CA ignition advance angle. The emission performance of the engine was better. The NO emissions increased with load increase, while the emissions of HC and CO decreased with the load increase. The NO emissions increased with the increase of calorific value of the cracking gas. The results indicate that the stable running and better economy and emission performances can be realized by using thermal cracking low heat value biogas as fuel of large bore engines.