Traditional technologies such as thermoelectric power generation (TEG) and organic Rankine cycle (ORC) are difficult to consider the multiple characteristics of various vessel waste heat, and the utilization rate is low. This paper presents a combination of TEG–ORC bottom cycles sources and studies the influence of the ORC evaporation pressure on the system output power, thermal efficiency, multi-stage waste heat utilization, and power generation cost. According to the utilization of flue gas waste heat by the two different cycles, the parameter of TEG–ORC cycle ratio is defined. The results show that the TEG–ORC combined bottom cycle system can make better use of the waste heat of various vessels as well as that cooling and heat dissipation of TEG cycle, improves the overall performance of waste heat utilization and output power. When the ORC evaporation pressure reaches the maximum examined value of 0.9 MPa, the waste heat utilization rate of the main engine flue gas is 62.15%, the waste heat recovery power was 1919.68 W, the total output power of the experimental system is 139.22 W, the thermal efficiency is 7.25%, and the power generation cost is 0.429 $/kWh.

热电发电（TEG）、有机朗肯循环（ORC）等传统技术难以兼顾各种船舶余热的多重特性，利用率低。本文提出了 TEG-ORC 底部循环源的组合，并研究了 ORC 蒸发压力对系统输出功率、热效率、多级余热利用和发电成本的影响。根据两种不同循环对烟气余热的利用情况，定义了TEG-ORC循环比参数。结果表明，TEG-ORC组合底循环系统可以更好地利用各种容器的余热以及TEG循环的冷却和散热，提高了余热利用和输出功率的综合性能。