High-Performance Nanostructured Thermoelectric Generators for Micro Combined Heat and Power Systems
High-Performance Nanostructured Thermoelectric Generators for Micro Combined Heat and Power Systems
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DOI：
10.1016/j.applthermaleng.2015.11.064
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发表时间：
2016-03
影响因子：
6.4
通讯作者：
Yanliang Zhang;Xiaowei Wang;M. Cleary;Luke Schoensee;Nicholas Kempf;Joseph Richardson
中科院分区：
文献类型：
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作者：
Yanliang Zhang;Xiaowei Wang;M. Cleary;Luke Schoensee;Nicholas Kempf;Joseph Richardson
微型热电联产（Micro - chp）系统是提高发电效率的有效途径。本文通过将高温热电发电机（teg）和住宅燃气锅炉集成在一起，实验证明了一种新型的无活动部件的微型热电联产系统，从而实现了广泛的应用。采用高效纳米结构体半heusler合金制备的teg在500℃冷热温差下可产生2.1 W/cm2的超高功率密度和5.3%的电效率。TEG系统利用燃烧气体和水之间未开发的能量，将热能转换为电能，根据输入TEG的总热量，热电效率为4%。高性能teg为改变发电技术和提高能源效率提供了许多机会。
Micro combined heat and power (micro-CHP) systems are promising pathways to increase power generation efficiencies. Here a new class of micro-CHP system without moving parts is experimentally demonstrated by integrating high-temperature thermoelectric generators (TEGs) and residential gas-fired boilers, thus enabling wide applications. The TEGs fabricated using high-efficiency nanostructured bulk half-Heusler alloys generate ultrahigh power density of 2.1 W/cm2with 5.3% electrical efficiency under 500 °C temperature differences between the hot and cold sides. The TEG system harnesses the untapped exergy between the combustion gas and water, and converts thermal energy into electric power with 4% heat-to-electricity efficiency based on the total heat input into the TEGs. The high-performance TEGs open lots of opportunities to transform power generation technologies and improve energy efficiency.