提出一套内燃机-有机朗肯循环系统方案，该方案的有机朗肯循环（ORC）子系统蒸发器布置在内燃机（ICE）排烟系统采集热量，其输m动力通过齿轮传动机构与ICE同轴输出．该系统可利用原有动力传输子系统启动ORC子系统，ORC子系统稳定运行后又可向其输出动力．以CAT3516CDITAICE为例，进行ICE-ORC系统技术经济性能分析，结果表明，标定负荷条件下，该系统总热效率较现有ICE系统可提高7．8％，而ORC子系统的投资回收期仅为9．3kh．分析表明，ORC子系统蒸发器平均温差降低或者燃料价格提高，均有利于改善ORC子系统技术经济性能；当ICE负荷高于90％或ORC子系统透平等熵效率高于65％，该系统具有技术经济性能优势．%An engine-organic Rankine cycle （ORC） compounded power scheme was proposed in this study. Evaporator of the ORC sub-system was arranged on the internal combustion engine （ICE） exhaust gas system. Power output of the ORC sub-system was transferred to engine main shaft through gear wheel drive construction. Main shaft of engine can be used to start the ORC sub-system, and vice versa, the ORC sub-system can transfer power to main shaft after started. Based on CAT3516CDITA engine, technological and economic performance of engine-ORC compounded power system was analyzed. Re- sults showed that the overall thermal efficiency could be increased by 7.8%, and payback period of the ORC sub-system is only 9.3 kh. The key parameters analysis showed that, under the condition of gas nocondensing at the evaporator outlet, the ORC sub-system technological and economic performance advantage became obviously with evaporator LMTD decreasing and/or fuel price rising. The configuration sizes of evaporator and condenser are confined by the limited space room and weight demand in operation. When load percent is over 90%, or organic turbine isentropic efficiency is over 0.65, the ORC compounded power scheme has technological and economic advantages.
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