Thermoelectric technology plays a crucial role in harnessing waste heat from automobile exhaust, and developing low-resistance and high-efficiency thermoelectric generator is currently a focal point of research. The intermediate fluid thermoelectric generator (IFTEG) introduces a structural modification to conventional designs by utilizing boiling-condensation heat transfer of the intermediate fluid to enhance power generation performance. In this study, we constructed an experimental system to investigate the thermoelectric characteristics of IFTEG. The results demonstrate that the IFTEG outperforms traditional thermoelectric generators, exhibiting a remarkable increase in total output power ranging from 171% to 283%, a reduction in pressure drop ranging from 23% to 42%, and a significant improvement in voltage distribution uniformity across the modules. Increasing the exhaust temperature and flow rate significantly enhances the net output power while minimally affecting the voltage distribution uniformity. The net output power of 10.17 W and the net thermoelectric conversion efficiency of 1.39% are achieved at 200 °C and 30 m/h. Overall, this novel generator offers advantages such as low pressure loss, high efficiency, and high reliability. The findings of this study provide valuable guidance for the development of exhaust thermoelectric generators.

中文翻译：

---

中间流体温差发电器热电特性实验研究

热电技术在汽车尾气余热利用中发挥着至关重要的作用，开发低电阻、高效率的热电发电机是目前研究的热点。中间流体热电发电机（IFTEG）对传统设计进行了结构修改，利用中间流体的沸腾-冷凝传热来提高发电性能。在本研究中，我们构建了一个实验系统来研究 IFTEG 的热电特性。结果表明，IFTEG 的性能优于传统热电发电机，总输出功率显着提高了 171% 至 283%，压降降低了 23% 至 42%，并且整个区域的电压分布均匀性显着改善。模块。提高排气温度和流量可显着提高净输出功率，同时对电压分布均匀性的影响最小。在200℃和30m/h下实现了10.17W的净输出功率和1.39%的净热电转换效率。总体而言，这种新型发电机具有压力损失低、效率高、可靠性高等优点。这项研究的结果为废气热电发电机的开发提供了有价值的指导。