研究目的
To determine the optimal geometry of the thermoelectric generator (TEG) element for the maximum efficiency in a hybrid PV-TE system.
研究成果
The study concludes that the maximum power generation in a PV-TE system occurs when the n- and p-type footprint area is symmetric (An/Ap=1), which differs from the optimization of TEG solely. The length and area of the TEG elements significantly influence the efficiency of the uni-couple, with optimal values depending on the specific configuration. This research provides valuable insights for the design of PV-TE systems aiming for maximum power generation.
研究不足
The study is limited to the analysis of geometric parameters of the TEG and their impact on the efficiency of the PV-TE system. The maximum efficiency observed was still lower than 13%, indicating potential areas for further optimization.
1：Experimental Design and Method Selection:
A finite element method (FEM) model was developed for the hybrid PV-TE uni-couple to analyze the optimal geometry of the TEG element. The 3D governing equations of thermoelectricity for heat transfer were solved using FEM, considering temperature-dependent properties of TEG materials.
2：Sample Selection and Data Sources:
The study focused on the geometric parameters of the TEG, including the ratio of the area of n- and p-type (An/Ap), the length, and the area of the TEG.
3：List of Experimental Equipment and Materials:
Parameters such as the area of PV cell, thickness of PV cell, thickness of Tedlar, thickness of metal sheet, absorptivity of PV, thermal conductivity of PV, Tedlar, and metal copper, emissivity of PV, ambient temperature, wind velocity, electrical conductivity of metal copper, solar radiation, and concentration ratio were used in the FEM model.
4：Experimental Procedures and Operational Workflow:
ANSYS was used to solve the temperature field and electrical field of the FEM model. The 3D numerical model was built for the PV-TE, accurately meshed into small tetrahedrons.
5：Data Analysis Methods:
The solution of the FEM model enabled the results to demonstrate detailed information of the temperature and voltage distribution in the uni-couples of TEG module.
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