应用数学和力学2023，Vol.44Issue(11)：1291-1298,8.DOI:10.21656/1000-0887.440147
多孔泡沫热电器件断裂及其对能量转化性能的影响规律研究
Evaluation of Fracture and its Effects on Energy Conversion Performance of Porous Foam Thermoelectric Generators
摘要
Abstract
The thermoelectric generator could convert the waste heat into electricity and reduce carbon dioxide emissions.This meets the national development needs for energy conservation and emission reduction,and fi-nally helps realize the carbon neutrality.The heat and electric conduction model was established to explain the internal mechanism of high output power of the porous thermoelectric foam.The effects of geometry and poros-ity on the fracture failure of the porous thermoelectric foam were also discussed.Then,the influential mecha-nism of fracture on the energy conversion performance of the porous thermoelectric foam was revealed.The re-sults show that,the interfacial shear stress between the thermoelectric foam and the metal layer will decrease with the porosity.As long as an internal crack of the porous thermoelectric foam starts to extend,it will not stop until the device is completely broken.Moreover,the output power will first increase to the peak value and then decrease with the crack propagation.This is because the crack propagation indirectly raises the porosity of the thermoelectric foam and the contact area between the thermoelectric foam and the waste heat,and in turn promotes the output power of the thermoelectric device.With further crack propagation,both the thermal con-ductivity and the electrical conductivity of the thermoelectric foam will weaken,and the output power of the thermoelectric foam will decrease.关键词
热电器件/多孔结构/断裂/废热回收/输出功率Key words
thermoelectric generator/porous structure/fracture/waste heat harvesting/power output分类
数理科学引用本文复制引用
崔有江,王保林,王开发..多孔泡沫热电器件断裂及其对能量转化性能的影响规律研究[J].应用数学和力学,2023,44(11):1291-1298,8.基金项目
国家自然科学基金项目(12102104 （）
11972137) （）
广东省基础与应用基础研究基金(2022A1515240072 （）
2022B1515020099 （）
2022A1515010801) （）
