Series of detail comparison and optimization of thermoelectric element geometry considering the PV effect

被引：57
作者：
Shittu, Samson [1 ]
Li, Guiqiang [1 ]
Zhao, Xudong [1 ]
Ma, Xiaoli [1 ]
机构：
[1] Univ Hull, Sch Engn, Kingston Upon Hull HU6 7RX, N Humberside, England
来源：
RENEWABLE ENERGY | 2019年 / 130卷
基金：
“创新英国”项目; 英国工程与自然科学研究理事会;
关键词：
PV-TE; Finite element method; TE area ratio; Geometry; Efficiency; HYBRID SYSTEM; PERFORMANCE EVALUATION; GENERATOR; SIMULATION; DESIGN; MODEL;
D O I：
10.1016/j.renene.2018.07.002
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This study investigates the optimum geometry for maximum efficiency of a hybrid,PV-TE uni-couple using Finite Element Method. COMSOL Multiphysics is used to solve the 3-Dimensional heat transfer equations considering thermoelectric materials with temperature dependent properties. Two types of thermoelectric element geometry area ratios are considered for the range 0.5 <= R-A <= 2 and 0.5 <= R-S <= 2. Nine different geometric configurations are analysed for two different PV cells. Effects of thermoelectric generator (TEG) geometric parameters, solar irradiation and concentration ratio on the hybrid system efficiency are presented. The results show that a hybrid Pv-TE system will perform better with symmetrical TEG geometry (R-A = R-s = 1) if a PV temperature coefficient of 0.004/K (Cell B) is used. This is different from the optimum geometry for a TEG only system. However, the optimum geometry of the TEG in a hybrid system will be the same as that of a TEG only system (dissymmetrical i.e. R-A = R-s not equal 1) if a PV temperature coefficient of 0.001/K (Cell A) is used. The overall efficiency and TE temperature difference show a decreasing trend as thermoelectric element length and area increase respectively no matter the configuration or temperature coefficient value used. Results obtained from this research would influence hybrid PV-TE system design for obtaining maximum conversion efficiency. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：930 / 942
页数：13
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