A High-Temperature Thermoelectric Generator Based on Oxides

2014 ◽  
Vol 1 (1-2) ◽  
Author(s):  
Armin Feldhoff ◽  
Benjamin Geppert
Keyword(s):  
High Temperature ◽  
Energy Conversion ◽  
Power Factor ◽  
Figure Of Merit ◽  
Thermoelectric Generator ◽  
Electrical Current ◽  
Oxide Ceramics ◽  
Thermoelectric Energy ◽  
Entropy Current ◽  
P Type

AbstractThe thermoelectric energy conversion is described in terms of fluxes of extensive variables entropy and charge, which gives a clear meaning to the figure of merit and to the power factor. Strength and sign of coupling of entropy current and electrical current is decisive for the function of a thermoelectric generator, which was built from n-type and p-type oxide ceramics to be suitable for the high-temperature range. For n-type and p-type legs, Zn

Oxide-Based Thermoelectric Generator for High-Temperature Application Using p-Type Ca3Co4O9 and n-Type In1.95Sn0.05O3 Legs

2016 ◽  
Vol 3 (3) ◽  
Author(s):  
Michael Bittner ◽  
Benjamin Geppert ◽  
Nikola Kanas ◽  
Sathya Prakash Singh ◽  
Kjell Wiik ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Energy ◽  
Thermoelectric Generator ◽  
Electrical Energy ◽  
Electrical Current ◽  
High Temperature Application ◽  
Thermoelectric Energy ◽  
Entropy Current ◽  
Temperature Application ◽  
P Type

AbstractA thermoelectric generator couples an entropy current with an electrical current in a way, that thermal energy is transformed to electrical energy. Hereby the thermoelectric energy conversion can be described in terms of fluxes of entropy and electric charge at locally different temperature and electric potential. Crucial for the function of a thermoelectric generator is the sign and strength of the coupling between the entropy current and the electrical current in the thermoelectric materials. For high-temperature application, tin-doped indium oxide (In

Improving power factor and figure of merit of p-type CuSbSe2 via introducing Sb vacancies

2021 ◽  
Author(s):  
Tao Chen ◽  
Hongwei Ming ◽  
Xiaoying Qin ◽  
Chen Zhu ◽  
Lulu Huang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Power Factor ◽  
Figure Of Merit ◽  
Environment Friendly ◽  
Low Thermal Conductivity ◽  
P Type

As a thermoelectric material, p-type CuSbSe2 has attracted much attention due to its intrinsic low thermal conductivity and environment-friendly constituents. In this work, Sb deficient compounds CuSb1-xSe2 (x=0-0.12) are prepared...

Doping Studies of n-Type CsBi4Te6 Thermoelectric Materials

2000 ◽  
Vol 626 ◽  
Author(s):  
Melissa A. Lane ◽  
John R. Ireland ◽  
Paul W. Brazis ◽  
Theodora Kyratsi ◽  
Duck-Young Chung ◽  
...  
Keyword(s):  
Power Factor ◽  
Thermoelectric Materials ◽  
Figure Of Merit ◽  
Doping Concentration ◽  
High Figure ◽  
P Type ◽  
Optimum Doping Concentration

ABSTRACTWe have previously reported the successful p-type doping of CsBi4Te6 which had a high figure of merit at temperatures below 300 K. In this study, several dopants were explored to make n-type CsBi4Te6. A program of measurements was performed to identify the optimum doping concentration for several series of dopants. The highest power factors occurred around 125 K for the 0.5% Sn doped CsBi4Te6 sample which had a power factor of 21.9 μW/cm•K2 and 1.0% Te doped CsBi4Te6 which had a power factor of 21.7 μW/cm•K2.

Oxide-Based Thermoelectric Generator for High-Temperature Application Using p-Type Ca3Co4O9 and n-Type In1.95Sn0.05O3 Legs

ENERGYO ◽  
2018 ◽  
Author(s):  
Michael Bittner ◽  
Benjamin Geppert ◽  
Nikola Kanas ◽  
Sathya Prakash Singh ◽  
Kjell Wiik ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermoelectric Generator ◽  
High Temperature Application ◽  
Temperature Application ◽  
P Type

scholarly journals Enhancement in thermoelectric properties due to Ag nanoparticles incorporated in Bi2Te3 matrix

2019 ◽  
Vol 10 ◽  
pp. 634-643 ◽  
Author(s):  
Srashti Gupta ◽  
Dinesh Chandra Agarwal ◽  
Bathula Sivaiah ◽  
Sankarakumar Amrithpandian ◽  
Kandasami Asokan ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Power Factor ◽  
Figure Of Merit ◽  
Transmission Electron ◽  
High Power Factor ◽  
Different Temperatures ◽  
High Figure ◽  
Filtering Effect ◽  
P Type ◽  
20 Nm

The present study aims to see the enhancement in thermoelectric properties of bismuth telluride (Bi2Te3) annealed at different temperatures (573 and 773 K) through silver (Ag) nano-inclusions (0, 2, 5, 10, 15 and 20 wt %). Transmission electron microscopy (TEM) images of Ag incorporated in Bi2Te3 annealed at 573 K shows tubular, pentagonal, trigonal, circular and hexagonal nanoparticles with sizes of 6–25 nm (for 5 wt % Ag ) and 7–30 nm (for 20 wt % Ag). Ag incorporated in Bi2Te3 annealed at 773 K shows mainly hexagonally shaped structures with particle sizes of 2–20 nm and 40–80 nm (for 5 wt % Ag) and 10–60 nm (for 20 wt % Ag). Interestingly, the samples annealed at 573 K show the highest Seebeck coefficient (S, also called thermopower) at room temperature (p-type behavior) for 5% Ag which is increased ca. five-fold in comparison to Ag-free Bi2Te3, whereas for samples with the same content (5% Ag) annealed at 773 K the increment in thermopower is only about three-fold with a 6.9-fold enhancement of the power factor (S 2σ). The effect of size and shape of the nanoparticles on thermoelectric properties can be understood on the basis of a carrier-filtering effect that results in an increase in thermopower along with a control over the reduction in electrical conductivity to maintain a high power factor yielding a high figure of merit.

Research on Thermoelectric Energy Conversion System for Controller in Magnetic Bearing

2014 ◽  
Vol 687-691 ◽  
pp. 390-393
Author(s):  
Jun Wang ◽  
Cong Huang ◽  
Peng Yuan Jiang
Keyword(s):  
Heat Source ◽  
Energy Conversion ◽  
High Speed ◽  
Thermoelectric Generator ◽  
Magnetic Bearing ◽  
Thermoelectric Energy Conversion ◽  
Cold Source ◽  
Thermoelectric Energy ◽  
Conversion System ◽  
Energy Conversion System

In order to prevent damage caused by instantaneous power failure to high-speed equipment, the thermoelectric energy conversion system for controller of magnetic bearing is studied. The heat source is used by the power loss of supply modules and the cold source is used by heat conduction aluminum block. The semiconductor thermoelectric generator produces direct-current working voltage between heat source and cold source. The overall design method of the energy conversion system is presented. The theory and design of circuits to thermoelectric energy generator, voltage regulator and charging for lithium polymer battery are analyzed. The experiment results show that this thermoelectric energy generator system is feasible and effective. The circuit can be adapted to change in output power due to temperature difference at both ends of the thermoelectric module. It achieves energy storage of the recovery from thermoelectric generator.

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