尾气温差发电系统建模及影响规律分析

马宗正

doi:10.13433/j.cnki.1003-8728.20220224

尾气温差发电系统建模及影响规律分析

doi: 10.13433/j.cnki.1003-8728.20220224

马宗正

1.
河南工程学院机械工程学院，郑州　451191

基金项目: 河南省科技攻关项目(212102210332)与河南省高等学校青年骨干教师资助计划(2014GGJS-120)

详细信息

作者简介:
马宗正，博士、教授，zongzhengma@163.com

中图分类号: TK417
计量
- 文章访问数: 33
- HTML全文浏览量: 12
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2021-12-23
- 网络出版日期: 2024-03-08
- 刊出日期: 2024-02-01

Model for Thermoelectric-generator Based on Engine Exhaust Gas and Influencing Law Analysis

MA Zongzheng

1.
School of Mechanical Engineering, Henan University of Engineering, Zhengzhou 451191, China

摘要

摘要: 为了能够利用温差发电技术对高温发动机尾气中蕴含的能量进行回收利用，建立了温差发电系统能量计算方程，在基于实验结果验证的基础上对影响温差发电系统输出功率的系统参数及其规律进行了研究。结果表明，随着外部负载的增加，输出功率呈现先增加后下降的趋势；塞贝克系数的影响规律基本一致，输出功率也呈现先增加后降低的趋势；内阻值与输出功率呈类二次方关系，随着内阻值的增大，输出功率降低；导热系数的变化对于温差发电输出功率影响较大，当导热系数变大后，输出功率降低；冷热端散热系数对温差发电模块输出功率的影响基本一致，输出功率随散热系数的增加而增加。
- 温差发电 /
- 输出功率 /
- 影响因素 /
- 影响规律 /
- 发动机尾气
Abstract: In order to recover and utilize the energy of engine exhaust gas with high temperature based on thermoelectric generation technology, the influencing factors of the thermoelectric generator system and the influencing laws of output power were studied based on the validation of equation with the compassion of experimental and simulation results. The simulation results show that the output power increases firstly and decreases with the increasing of external load. The influencing law of See-beck coefficient is basically the same as the external load which shows a trend of increasing first and then decreasing. The relation between the internal resistance and the output power is quasi-quadratic, and the output power decreases with the increasing of internal resistance. The change in thermal conductivity of the thermoelectric generation module has a great effect on the output power. When the thermal conductivity becomes larger, the output power decreases and when the thermal conductivity increases from 0.01 to 0.9, the output power decreases by 80%. The effect of the heat dissipation coefficient of the hot and cold ends on the output power is basically the same which is that the output power increases with the increasing of heat dissipation coefficient.
- thermoelectric generator /
- output power /
- effect factors /
- effect law /
- engine exhaust gas

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图 1 温差发电系统示意图

Figure 1. Schematic diagram of the TEG system

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图 2 温差发电装置示意图

Figure 2. Schematic diagram of the TEG system

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图 3 温差发电器能量传递示意图

T_A-环境温度；T_B-冷源温度；Q_H-热端散去的热量；T_H-模型热端面的温度；T_C -传递到模型冷端的温度；Q_C-冷端吸收的热量；K_i-热端热传导系数；K_sink-冷端热传导系数；R_i-外接电路电阻；i-产生电流；N-温差发电模块个数。

Figure 3. Schematic diagram of energy transfer of the TEG system

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图 4 温差发电器仿真与实验结果对比

Figure 4. Comparison of simulation and experiment results

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图 5 外部负载对输出功率的影响

Figure 5. Effect of external load on output power

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图 6 外部负载变化时温度及温差的变化

Figure 6. Vibration of temperature during the change of external load

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图 7 温差一定时输出功率随外部负载的变化

Figure 7. Effect of external load on output power at fixed temperature difference

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图 8 塞贝克系数对输出功率的影响

Figure 8. Effect of see-beck coefficient on output power

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图 9 塞贝克系数变化时温度及温差的变化

Figure 9. Vibration of temperature during the see-beck coefficient change

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图 10 温差发电模块内阻值对输出功率的影响

Figure 10. Effect of inner resistance of TEG system on output power

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图 11 温差发电模块电流随内阻值变化

Figure 11. Vibration of current with the change of inner resistance

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图 12 温差发电模块导热系数对输出功率的影响

Figure 12. Effect of inner resistance on output power

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图 13 热端散热系数变化时温差发电模块输出功率的变化

Figure 13. Effect of heat dissipation coefficient of hot end on output power

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图 14 冷端散热系数变化时温差发电模块输出功率的变化

Figure 14. Effect of heat dissipation coefficient of cold end on output power

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表 1 EQ491型发动机参数

Table 1. Parameters of the EQ491 engine

型式	行程 × 缸径/mm	总排量/ mL	标定功率/kW, 转速/(r·min⁻¹)	压缩比	冷却方式
四冲程	76.95 × 90.82	1993	76, 5200	8.7:1	水冷

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表 2 主要试验设备

Table 2. Main test equipment

名称	型号	生产厂家
热电偶	K型	江苏联能电子技术有限公司
声级计	HS5660D	江西红声电子有限公司
测控系统	ET2000	四川城邦测控技术有限公司
万用表	FLUKE-115C	福禄克万用表
风速仪	GM8901	深圳市聚茂源科技有限公司

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表 3 仪器测量范围及精度

Table 3. Measurement and accuracy of the equipment

项目	温度/℃	电流/A	电压/V	风速/(m·s⁻¹)	噪声/dB
测量范围	0~800	0~10	0~60	0~45	25~130
分辨率	0.10	0.01	0.01	0.10	0.10
误差	± 0.5%	1.5%	± 1%	± 1%	± 0.8

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