TEMPERATURE DIFFERENCE ESTIMATION METHOD FOR THERMOELECTRIC MODULES BASED ON IMPROVED THERMAL NETWORK AND PARAMETER IDENTIFICATION

Zu Wei; Ying Zhangfen; Yang Yi

doi:10.19912/j.0254-0096.tynxb.2025-0500

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (8) : 350-358. DOI: 10.19912/j.0254-0096.tynxb.2025-0500

TEMPERATURE DIFFERENCE ESTIMATION METHOD FOR THERMOELECTRIC MODULES BASED ON IMPROVED THERMAL NETWORK AND PARAMETER IDENTIFICATION

Zu Wei¹, Ying Zhangfen², Yang Yi²

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Abstract

In the paper, based on an improved equivalent thermal network and multi-objective parameter identification, a method for estimating the temperature difference of TEG modules is proposed. This method firstly improves the traditional equivalent thermal network to describe the nonlinear influence of environmental thermal convection and heatsink on module heat dissipation. Then, using the minimum estimation errors of the hot side, cold side, and heatsink temperatures as multi-objective functions, the thermal parameters of the module are identified by combining the convex function characteristic analysis and the non-dominated sorting genetic algorithm II. Finally, the temperature difference between the hot and cold sides is quickly estimated based on the identified parameters and the improved equivalent thermal network. The proposed method is experimentally validated under natural convection conditions where the change in heat dissipation power is most pronounced nonlinearly. The results show that this method can extract TEG module thermal parameters that are difficult to calculate theoretically with high precision and accurately estimate the dynamic changes in the temperature difference between the module's hot and cold sides under natural convection conditions.

Key words

thermoelectric power generation / thermal network / parameter identification / nonlinear heat transfer / temperature estimation

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Zu Wei, Ying Zhangfen, Yang Yi. TEMPERATURE DIFFERENCE ESTIMATION METHOD FOR THERMOELECTRIC MODULES BASED ON IMPROVED THERMAL NETWORK AND PARAMETER IDENTIFICATION[J]. Acta Energiae Solaris Sinica. 2026, 47(8): 350-358 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0500

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