Enhancement of Energy Conversion Efficiency via Interfacial Carrier Diffusion in Microscale Segmented Thermoelectric Materials

2021 ◽  
Author(s):  
Zhihe Jin ◽  
Jiashi Yang
Keyword(s):  
Energy Conversion ◽  
Conversion Efficiency ◽  
Thermoelectric Materials ◽  
Energy Conversion Efficiency ◽  
Carrier Diffusion

Highly efficient functional GexPb1−xTe based thermoelectric alloys

2014 ◽  
Vol 16 (37) ◽  
pp. 20120-20126 ◽  
Author(s):  
Yaniv Gelbstein ◽  
Joseph Davidow
Keyword(s):  
Energy Conversion ◽  
Fuel Consumption ◽  
Conversion Efficiency ◽  
Thermoelectric Materials ◽  
Waste Heat ◽  
Electrical Power ◽  
Electrical Energy ◽  
Energy Conversion Efficiency ◽  
Efficient Implementation ◽  
Thermoelectric Devices

Methods for enhancement of the direct thermal to electrical energy conversion efficiency, upon development of advanced thermoelectric materials, are constantly investigated mainly for an efficient implementation of thermoelectric devices in automotive vehicles, for utilizing the waste heat generated in such engines into useful electrical power and thereby reduction of the fuel consumption and CO2 emission levels.

scholarly journals Estimating Energy Conversion Efficiency of Thermoelectric Materials: Constant Property Versus Average Property Models

2016 ◽  
Vol 46 (1) ◽  
pp. 6-13 ◽  
Author(s):  
Hannah Armstrong ◽  
Matthew Boese ◽  
Cody Carmichael ◽  
Hannah Dimich ◽  
Dylan Seay ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Conversion Efficiency ◽  
Thermoelectric Materials ◽  
Energy Conversion Efficiency ◽  
Constant Property ◽  
Property Versus

Combustion-Thermoelectric Tube

2000 ◽  
Vol 122 (4) ◽  
pp. 721-729 ◽  
Author(s):  
C.-W. Park ◽  
M. Kaviany
Keyword(s):  
Thermal Conductivity ◽  
High Temperature ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Thermoelectric Materials ◽  
High Efficiency ◽  
Fuel Injection ◽  
Direct Injection ◽  
Energy Conversion Efficiency ◽  
Solid Matrix

In direct combustion-thermoelectric energy conversion, direct fuel injection and reciprocation of the air flowing in a solid matrix are combined with the solid-gas interfacial heat transfer and the solid conduction to allow for obtaining superadiabatic temperatures at the hot junctions. While the solid conductivity is necessary, the relatively large thermal conductivity of the available high-temperature thermoelectric materials (e.g., Si–Ge alloys) results in a large conduction loss from the hot junctions and deteriorates the performance. Here, a combustion-thermoelectric tube is introduced and analyzed. Radially averaged temperatures are used for the fluid and solid phases. A combination of external cooling of the cold junctions, and direct injection of the fuel, has been used to increase the energy conversion efficiency for low thermal conductivity, high-melting temperature thermoelectric materials. The parametric study (geometry, flow, stoichiometry, materials) shows that with the current high figure of merit, high temperature Si0.7Ge0.3 properties, a conversion efficiency of about 11 percent is achievable. With lower thermal conductivities for these high-temperature materials, efficiencies about 25 percent appear possible. This places this energy conversion in line with the other high efficiency, direct, electric power generation methods. [S0022-1481(00)01304-9]

First-principles study on the electronic and optical properties of the orthorhombic CsPbBr3 and CsPbI3 with Cmcm space group

2021 ◽  
Author(s):  
Xianhao Zhao ◽  
Tianyu Tang ◽  
Quan Xie ◽  
like gao ◽  
Limin Lu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
First Principles ◽  
Energy Conversion Efficiency ◽  
Space Group ◽  
Absorbing Materials ◽  
Halide Perovskites ◽  
Lead Halide

The cesium lead halide perovskites are regarded as effective candidates for light-absorbing materials in solar cells, which have shown excellent performances in experiments such as promising energy conversion efficiency. In...

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