冷热电联供(combined cooling heating and power, CCHP)系统的运行特性直接关系着联供系统的应用价值。以10 kW内燃机冷热电联供试验台为例，研究系统中各主要设备的运行特性，并对整个系统的能流进行分析。实验结果表明：最佳工况下，内燃机发电效率为30.74%，联供系统一次能源利用率为79.08%；内燃机功率增加使油耗增加，排烟温度逐渐升高，但发电效率呈先升高后下降的趋势；余热回收装置运行性能良好，能有效回收大部分余热；制冷机运行性能受环境温度与出口水温影响较大；系统能流间存在一定的制约关系。此实验研究为进一步了解内燃机冷热电三联供系统的运行提供了重要参考。

The operating characteristics of the combined cooling heating and power (CCHP) system relates to the application value of the co-supply system. Taking 10 kW internal combustion engine CCHP triple system test bench as an example, this paper studies the operating characteristics of major equipment in the system and analyzes the energy flow of the entire system. The experimental results show that under the best operating conditions, the internal combustion engine power generation efficiency is 30.74%. At this time, the primary energy utilization rate of the co-fed system is 79.08%. With the increase of the internal combustion engine power increases, the fuel consumption and the exhaust gas temperature gradually increases, but the efficiency of power generation increased first and then decreased; The waste heat recovery device has good performance and can effectively recover most of the waste heat; The operating performance of the refrigerator is affected by the ambient temperature and outlet water temperature; There are certain restrictions on the flow of systems. This experimental study provides an important reference for further understanding of the operation of internal combustion engine CCHP system.