Title :
Structural design of large size thermoelectric module and thermoelectric properties of β-FeSi2 prepared by thermal spraying
Author :
Tsutsumi, Atsushi ; Kuramoto, Koji ; Sawazaki, Jun-iqhi ; Makita, Yusuke ; Yoshida, Kunio ; Ueno, Kazuo ; Sodeoka, Satoshi ; Suzuki, Masato
Author_Institution :
Dept. of Chem. Syst. Eng., Tokyo Univ., Japan
Abstract :
A novel design of large size thermoelectric module and the application of thermal spraying technology to the module processing were presented for a thermoelectric power generation system utilizing waste heat. Using the thermal spraying process a layer of semiconducting iron disilicides, FeSi2, was directly deposited on the heat transfer surface of the heat exchanger to form a thermoelectric device with large area and high porosity. β-FeSi2 was formed by heat treatment. The thermoelectric properties of β-FeSi2 prepared by thermal spraying were investigated. In addition, porous FeSi 2 thermoelectric devices were fabricated by sintering under various conditions. The effect of porosity on thermoelectric properties was studied
Keywords :
heat exchangers; heat transfer; heat treatment; iron alloys; plasma arc sprayed coatings; plasma arc spraying; porous materials; silicon alloys; thermoelectric conversion; thermoelectric devices; β-FeSi2; FeSi2; heat exchanger; heat transfer surface; heat treatment; high porosity; module processing; plasma spray processing; porous FeSi2 thermoelectric devices; powder preparation; semiconducting iron disilicides; sintering; structural design; thermal spraying; thermoelectric device; thermoelectric module; thermoelectric power generation system; thermoelectric properties; waste heat utilisation; Heat transfer; Heat treatment; Iron; Power generation; Semiconductivity; Surface treatment; Thermal spraying; Thermoelectric devices; Thermoelectricity; Waste heat;
Conference_Titel :
Thermoelectrics, 1998. Proceedings ICT 98. XVII International Conference on
Conference_Location :
Nagoya
Print_ISBN :
0-7803-4907-5
DOI :
10.1109/ICT.1998.740406
