技术中心

摘 要： 在燃气驱动热泵系统中，燃料发动机在部分负荷工况下运行时，输出负荷随用户需求负荷而变化，通常偏离标定工况和最佳运行工况。为了克服发动机热效率偏低、排放量较大的缺陷，首先在建立发动机通用数学模型基础上，通过构建发动机经济运行区，优化发动机运行工况，从而提高发动机热效率并降低发动机尾气排放量；最后基于发动机经济运行区，对某改装后的燃气发动机进行了性能优化。 关键词 ：燃气热泵；发动机；动力系统；优化 Performance optimization of engine due to the gas engine-driven heat pump system Li Yinglin, Xue Qianbao, Zhang Qi, Huang Hu School of power engineering of Nanjing Normal University, Nanjing, China, 210042 Abstract: During the working of the gas engine-driven heat pump system, the output load of the gas engine varied with the demand load of users, it resulted in the engine lower thermal efficiency and worse emissions due to frequently deviating from nominal operation. To overcome the drawbacks above, firstly, the universal mathematical model of engine was established. And then the economical operating zone of engine was presented and described. Lastly, by applying this special economical operating zone to a certain refitted engine, this given engines performance was optimized. Keywords: engine-driven heat pump; engine; power system; optimization