Study on Analytical Method and Thermal Mismatch Performance of Thermoelectric Generator Array

doi:10.11985/2023.02.008

Abstract

Abstract:

The thermal mismatch phenomenon in thermoelectric generator(TEG) arrays can lead to device damage and seriously affect the efficiency and reliability of the generation units. In order to analyze the electrical characteristics of TEGs and the effects of thermal mismatch on the arrays, an analytical method is proposed to analyze the electrical characteristics of TEGs through the analysis of Kirchhoff’s voltage and current law; meanwhile, an experimental platform for TEGs with low-grade heat source is built, and the experiments and analysis of thermal mismatch are carried out based on the built TEG platform. The maximum output power of each array is measured, and the loss rate of each array is calculated to quantify the effect of thermal mismatch on temperature difference power generation. Finally, it is found that the temperature mismatch causes a significant decrease in array power, the series-parallel(SP) structure has higher efficiency than the rest of the arrays, the uniformity of temperature distribution has a strong correlation with the output power of temperature differential power generation, and the complexity of the array connection has a correlation with the output power of temperature differential power generation.

Key words: Thermoelectric generator array, heat mismatch, numerical analytical method

CLC Number:

TM561

WANG Litong, WANG Jun, GAN Yudong, SUN Zhang. Study on Analytical Method and Thermal Mismatch Performance of Thermoelectric Generator Array[J]. Journal of Electrical Engineering, 2023, 18(2): 78-88.

Figures/Tables 21

References 22

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温度分布情况	阵列类型		I_max/A	P_max/W
情况1	SP	7.32	2.27	16.61
	BL	7.31	2.25	16.42
	TCT	7.58	2.15	16.32
情况2	SP	7.48	2.18	16.38
	BL	7.5	2.15	16.11
	TCT	7.16	2.23	16.01
情况3	SP	7.03	2.21	15.56
	BL	7.31	2.08	15.25
	TCT	6.9	2.15	14.88

阵列类型	理想最大输出功率/W	温度失配情况下的损耗率(%)
阵列类型	理想最大输出功率/W	情况1	情况2	情况3
SP	19.76	15.94	17.10	21.25
BL	19.76	16.90	18.47	22.82
TCT	19.76	17.40	18.97	24.69

源		III 类平方和	自由度	均方	F	显著性
温度分布	假设球形度	14.801	2	7.401	29.588	0.000
	格林豪斯-盖斯勒	14.801	1.763	8.396	29.588	0.000
	辛-费德特	14.801	2.000	7.401	29.588	0.000
	下限	14.801	1.000	14.801	29.588	0.000
连接方式	假设球形度	2.190	2	1.095	9.529	0.000
	格林豪斯-盖斯勒	2.190	1.157	1.893	9.529	0.003
	辛-费德特	2.190	1.280	1.711	9.529	0.002
	下限	2.190	1.000	2.190	9.529	0.005