汽车尾气温差发电系统车载兼容性多目标优化研究

doi:10.3969/j.issn.1004-132X.2022.16.014

中国机械工程 ›› 2022, Vol. 33 ›› Issue (16): 2000-2007，2015.DOI: 10.3969/j.issn.1004-132X.2022.16.014

汽车尾气温差发电系统车载兼容性多目标优化研究

全睿1,2;李涛1,2;乐有生1,2;常雨芳1,2;谭保华3

1.湖北工业大学太阳能高效利用及储能运行控制湖北省重点实验室，武汉，430068
2.湖北工业大学太阳能高效利用湖北省协同创新中心，武汉，430068
3.湖北工业大学理学院，武汉，430068

出版日期:2022-08-25 发布日期:2022-09-08
通讯作者: 谭保华（通信作者），男，1978年生，教授、博士研究生导师。研究方向为测控技术、信息交互技术、新能源技术等。E-mail:tan_bh@126.com。
作者简介:全睿，男，1984年生，副教授。研究方向为温差发电、燃料电池、故障诊断与容错控制技术等。E-mail:quan_rui@126.com。
基金资助:
国家自然科学基金（51977061，51407063）;太阳能高效利用及储能运行控制湖北省重点实验室开放基金（HBSEES202205）

Research on Multi-objective Optimization of Vehicle Compatibility of Automobile Exhaust Thermoelectric Generator Systems

QUAN Rui 1,2;LI Tao 1,2;YUE Yousheng 1,2;CHANG Yufang 1,2;TAN Baohua3

1.Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System,Hubei University of Technology,Wuhan,430068
2.Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy,Hubei University of Technology,Wuhan,430068
3.School of Science,Hubei University of Technology,Wuhan,430068

Online:2022-08-25 Published:2022-09-08

摘要/Abstract

摘要： 汽车尾气温差发电系统在接入发动机的排气管时会改变其气流，为了尽可能降低对发动机原有性能的影响，提高汽车尾气温差发电系统的发电性能，针对汽车尾气温差发电用六边形热交换器，以表面平均温度最高和压力损失最小为目标进行其车载兼容性优化。基于CFD软件搭建了热交换器的有限元仿真模型，研究热交换器的入口气体流速对其表面温度和压力损失的影响，以及入口气体温度对其表面温度的影响，以翅片长度、角度、宽度及翅片间的间距为设计变量，针对试验数据建立高斯过程回归代理模型，并采用灰狼算法在多目标优化函数空间中寻求最优解。结果表明，与经典的NSGA-Ⅱ算法相比，利用多目标灰狼算法进行优化时所得Pareto解集更为集中，设定的评价指标值也更高；与优化前的几种结构相比，优化后的热交换器表面平均温度有所降低，但压力损失下降显著；与空腔结构热交换器相比，其表面平均温度和压力损失均有提升，压力损失增加幅值在可接受范围内，证明优化后的热交换器能有效兼顾汽车尾气温差发电系统的功率及其车载兼容性。

关键词: 汽车尾气温差发电, 热交换器, 车载兼容性, 多目标灰狼优化算法

Abstract: When the automobile exhaust thermoelectric generator system was connected to the exhaust pipe of the engine, the airflow would be changed. In order to minimize the impacts on the original performance of the engines and improve the electrical power generation performance of the automobile exhaust thermoelectric generator systems, a hexagonal heat exchanger used for an automobile exhaust thermoelectric generator system was optimized for the on-board compatibility with the goal of the highest average surface temperature and the smallest pressure loss. A finite element simulation model of the heat exchanger was built based on CFD software to study the influences of the inlet gas speed of the heat exchanger on the surface temperature and pressure loss, as well as the influences of the inlet gas temperature on the surface temperature. The fins length, fins angle, fins width and fins spacing were taken as the design variables. The Gaussian process regression proxy model was established based on the test data, and the grey wolf algorithm was used to obtain the optimal solution in the multi-objective optimization function space. The results show that compared with the classical NSGA-Ⅱ algorithm, the Pareto solution set obtained by multi-objective grey wolf algorithm is more concentrated and the evaluation index is higher. The optimized heat exchanger with multi-objective grey wolf algorithm has a lower surface average temperature than that of several structures before optimization, but the pressure loss is significantly reduced. Compared with the cavity structure heat exchanger, the surface average temperature and pressure loss of optimized heat exchanger increase, and the pressure loss increasing amplitudes are within the acceptable ranges. The optimized heat exchanger may effectively take into account the power generation of the automobile exhaust thermoelectric generator systems and the on-board compatibility.

Key words: automobile exhaust thermoelectric generation, heat exchanger, vehicle compatibility, multi-target grey wolf optimization algorithm

中图分类号:

全睿, 李涛, 乐有生, 常雨芳, 谭保华. 汽车尾气温差发电系统车载兼容性多目标优化研究[J]. 中国机械工程, 2022, 33(16): 2000-2007，2015.

QUAN Rui , LI Tao , YUE Yousheng , CHANG Yufang , TAN Baohua. Research on Multi-objective Optimization of Vehicle Compatibility of Automobile Exhaust Thermoelectric Generator Systems[J]. China Mechanical Engineering, 2022, 33(16): 2000-2007，2015.

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http://www.cmemo.org.cn/CN/Y2022/V33/I16/2000

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[1]	房伟1;全书海1;谭保华2,3;冉斌4;王力1;焦亚田1. 汽车尾气热电转换装置电气拓扑结构优化[J]. 中国机械工程, 2017, 28(21): 2620-2626.
[2]	房伟, 全书海 , 方洪 , 谭保华, 黄亮 . 基于二分梯度法的汽车尾气发电最大功率跟踪算法[J]. 中国机械工程, 2016, 27(19): 2693-2697.

汽车尾气温差发电系统车载兼容性多目标优化研究

Research on Multi-objective Optimization of Vehicle Compatibility of Automobile Exhaust Thermoelectric Generator Systems

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