Thermoelectric oxide modules tested in a solar cavity-receiver

Petr Tomeš, Clemens Suter, Matthias Trottmann, Aldo Steinfeld, Anke Weidenkaff
2011 Journal of Materials Research  
Four-leg thermoelectric oxide modules (TOMs) consisting of two p-type (La 1.98 Sr 0.02 CuO 4 ) and two n-type (CaMn 0.98 Nb 0.02 O 3 ) thermoelectric (TE) legs were produced with a manufacturing quality factor between 30 and 60%. The pressed sintered TE legs revealed 90% of the theoretical density to ensure a sufficient mechanical stability of the TE modules. The legs were connected electrically in series and sandwiched thermally in parallel between two Al 2 O 3 plates serving as absorber and
more » ... g as absorber and cooler, respectively. A solar cavity-receiver packed with an array of TOMs was subjected to concentrated thermal radiation with peak solar radiative flux intensities exceeding 600 kW/m 2 . Temperature distributions in the cavity, open-circuit voltage (V OC ), and maximum output power (P max ) were measured for different external loads and solar radiative fluxes (q in ). Finally, the solar-to-electricity conversion efficiency (g) was calculated.
doi:10.1557/jmr.2011.125 fatcat:zjzhqy47hrbldm5xigtrmz3uf4