Based on the thermoelectric effect,micro thermoelectric generators(mTEG)can convert human body heat into electrical energy,serving as an alternative to batteries that require frequent replacement or charging,enabling wearable electronics to be self-powered.Micro thermoelectric generators with Y-type thermoelectric elements exhibit stronger heat recovery capabilities compared to traditional π-type structures.Using COMSOL Multiphysics multiphysics simulation software,this study investigates the impact of thermoelectric dimensions on the transmission performance of micro thermoelectric generators with Y-type thermoelectric elements under actual natural convection conditions.The results show that,as the length of the thermoelectric film increases,the open-circuit voltage and internal resistance of the mTEG decrease,while the width shows an almost opposite trend.For different load resistances,the optimal width of the thermoelectric film for maximum output power is consistently 610 μm.When the length of the thermoelectric film is 1 800 μm and the load resistance is 1.1 kΩ,the optimal output power is achieved at 0.57 nW,representing a 185%increase compared to the original design.
关键词
热电薄膜/温差发电器/Y型热电单元/输出功率
Key words
thermoelectric film/thermoelectric generator/Y-type thermoelectric units/output power
维普
万方数据