Fuel saving potential analysis of bifunctional vehicular waste heat recovery system using thermoelectric generator and organic Rankine cycle
Fuel saving potential analysis of bifunctional vehicular waste heat recovery system using thermoelectric generator and organic Rankine cycle
复制标题
利用热电发电机和有机朗肯循环的双功能车辆余热回收系统的节油潜力分析
DOI：
10.1016/j.energy.2022.125717
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发表时间：
2023
期刊：
影响因子：
9
通讯作者：
Lan S
中科院分区：
文献类型：
--
作者：
Lan S
有机朗肯循环(ORC)和热电发电机(TEG)都被认为是可靠的余热回收(WHR)技术，尽管它们在能量转换效率、体积大小和运行温度上有所不同。热电发电机和有机朗肯循环(TEG-ORC)的组合系统使TEG和ORC具有互补性。在这项研究中，提出了一种新型的TEG-ORC系统，用于轻型汽车的应用。考虑到车辆的空间限制，拟议的系统有效地利用了汽车中现有的部件，以减小整体尺寸。此外，TEG-ORC是一个双功能系统，它不仅可以回收废气能量，还可以作为发动机油快速预热的加热装置。TEG-ORC系统的燃料节约潜力与基准、独立TEG和独立ORC系统的对比进行了评估。结果表明，TEG-ORC系统有效地缩短了发动机油预热时间和WHR的系统滞后时间。当TEG和ORC组合时，燃料节约潜力显著增加，这是单独的TEG或单独的ORC无法实现的。这似乎是汽车应用中余热回收的一个突破，因为拟议的TEG-ORC系统结构紧凑，具有可接受的节油性能。
Organic Rankine cycle (ORC) and thermoelectric generator (TEG) have both been identified as reliable waste heat recovery (WHR) technologies, although they are different in energy conversion efficiency, volume size and operating temperatures. The combined thermoelectric generator and organic Rankine cycle (TEG-ORC) system enables TEG and ORC to be complementary. In this study, a novel TEG-ORC system is proposed in a light-duty vehicle application. Regarding the space limitations in vehicles, the proposed system effectively uses existing components in the car to reduce the overall size. In addition, the TEG-ORC is a bifunctional system, which not only works for exhaust energy recovery, but also acts as a heating device for fast engine oil warm-up. The fuel saving potential of the TEG-ORC system is assessed against that of the baseline, standalone TEG and standalone ORC systems. The results show that TEG-ORC system effectively reduces the engine oil warm-up time and system hysteresis time of WHR. A significant increase of fuel saving potential is obtained when TEG and ORC are combined, which is not achievable by a single TEG or a single ORC. This seems a breakthrough for waste heat recovery in vehicle applications since the proposed TEG-ORC system is compact and has an acceptable fuel saving performance.