冷却液温度对天然气发动机性能影响试验

Coolant Temperature Effect on LNG Engine

在一台液化天然气(LNG)发动机上进行60、70、80、90℃4个不同冷却液温度水平的发动机全工况性能试验,结果表明冷却液温度影响LNG发动机的性能;冷却液温度升高,燃料经济性增加,但同时NOx排放量也普遍增加;冷却液温度对HC和CO排放量有不同程度的影响。根据试验结果进行优化设计,得到该型LNG发动机的最佳冷却液温度MAP。

Performance of the LNG（liquefied natural gas） engine was tested on overall conditions at four different coolant temperatures,the temperatures were set at 60℃,70℃,80℃ and 90℃ in the tests.The testing results showed that coolant temperature influenced on performance of the LNG engine,the higher coolant temperature was,the better fuel economy would be,but NOx emission would be more.The coolant temperature also influenced on HC and CO emissions,but the influence was not obvious.By doing the tests,the optimum coolant temperature MAP of the engine was obtained.