期刊
JOURNAL OF ELECTRONIC MATERIALS
卷 43, 期 6, 页码 2348-2355出版社
SPRINGER
DOI: 10.1007/s11664-014-3063-z
关键词
Thermoelectric generators; solar-selective absorbers; solar cavity receivers; solid-state heat engines; concentrating solar power
资金
- Department of Defense through the National Defense Science & Engineering Graduate Fellowship Program
- NSF Materials Research Science and Engineering Center at CSM (NSF-MRSEC) [DMR0820518]
- Advanced Research Projects Agency - Energy (ARPA-E), US Department of Energy [DE-AR0000287]
Inspired by recent high-efficiency thermoelectric modules, we consider thermoelectrics for terrestrial applications in concentrated solar thermoelectric generators (STEGs). The STEG is modeled as two subsystems: a TEG, and a solar absorber that efficiently captures the concentrated sunlight and limits radiative losses from the system. The TEG subsystem is modeled using thermoelectric compatibility theory; this model does not constrain the material properties to be constant with temperature. Considering a three-stage TEG based on current record modules, this model suggests that 18% efficiency could be experimentally expected with a temperature gradient of 1000A degrees C to 100A degrees C. Achieving 15% overall STEG efficiency thus requires an absorber efficiency above 85%, and we consider two methods to achieve this: solar-selective absorbers and thermally insulating cavities. When the TEG and absorber subsystem models are combined, we expect that the STEG modeled here could achieve 15% efficiency with optical concentration between 250 and 300 suns.
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