A performance comparison of SiGe and skutterudite based segmented thermoelectric devices

作者: Mohamed S. El-Genk , Hamed H. Saber , Thierry Caillat

DOI: 10.1063/1.1449831

关键词: Silicon-germaniumElectricityRadioisotope thermoelectric generatorMaterials scienceThermoelectric effectSkutteruditeEngineering physicsSpacecraftElectrical engineeringPerformance comparisonGeneral Purpose Heat Source

摘要: For the past 25 years, unicouples made of Silicon Germanium alloys (Si0.8Ge0.2 and Si0.63Ge0.38) have been used in majority spacecraft powered by Radioisotope Thermoelectric Generators (RTGs) to explore various planets solar system as well sun. These operate typically at hot cold side temperatures 1175–1273 K 573 K, respectively, converting heat produced General Purpose Heat Source (GPHS) modules electricity efficiencies <7%. Recently, Segmented Unicouples (STUs) n-type Bi2Te3 CoSb3-based p-type CeFe4Sb12-based developed tested successfully with a demonstrated efficiency date ∼10% potential for achieving 14–15% when operated 973 300 respectively. This paper compares performance SiGe skutterudite STUs, same temperature 300, 573, 673 ...

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