Year: 2016
Type: article
Abstract: The thermoelectric generator (TEG) is a promising device for changing wasted heat energy into electricity, however the device is currently inefficient at generating power in this way. Exploration and development of thedevice’s efficiency is necessary for cell fabrication. In this work, comparisons are made between the power generation of uni-leg p-Ca3Co4O9, uni-leg n-Ca0.97Bi0.03MnO3 and p-n junction (-shape) of p-Ca3Co4O9,n-Ca 0.97Bi0.03MnO3. The dimensions of the thermoelectric material were a cross-sectioned area of 78.5 mm2 with a height of 10 mm. The size of the alumina substrate was 25×25 mm2. Thermoelectric cell fabrication used copperwire, series connected thermoelectric materials for the uni-legs cell and thin copper plate for the -shape thermoelectric cell. The voltage, current, power output and conversion efficiencies were measured by the steadystat method. It was found that, in the 3 samples, uni-leg n-Ca0.97Bi0.03MnO3 had the highest maximum voltage of 76.8 mV, with electrical current around 70 mA, electrical power of 5 mW and a conversion efficiency of 0.187% ata temperature difference of 200 K, which makes this fabricated thermoelectric device feasible.
Source: Creative Science
Author: Supasit Paengson
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2410593339