Energy Conversion from Waste Heat

2018 ◽  
Vol 138 (6) ◽  
pp. 357-360
Author(s):  
Jun HAYAKAWA
Keyword(s):  
Energy Conversion ◽  
Waste Heat

SnSe, the rising star thermoelectric material: a new paradigm in atomic blocks, building intriguing physical properties

2021 ◽  
Author(s):  
Lin Xie ◽  
Dongsheng He ◽  
Jiaqing He
Keyword(s):  
Physical Properties ◽  
Energy Conversion ◽  
Thermoelectric Material ◽  
Thermoelectric Materials ◽  
Waste Heat ◽  
New Paradigm ◽  
Direct Energy Conversion ◽  
Structures And Properties ◽  
Direct Energy

Thermoelectric materials, which enable direct energy conversion between waste heat and electricity, are witnessing exciting developments due to innovative breakthroughs both in materials and the synergistic optimization of structures and properties.

Data collection, simulation and design of a waste heat energy conversion system

2009 ◽  
Author(s):  
J. Mikael Eklund ◽  
Ian Spencer ◽  
Jinfu Zheng ◽  
Neil Yhap ◽  
Ryan Naughton ◽  
...  
Keyword(s):  
Data Collection ◽  
Energy Conversion ◽  
Waste Heat ◽  
Heat Energy ◽  
Conversion System ◽  
Energy Conversion System

Thermoelectric Transport in Silicon Germanium Nanocomposite

2008 ◽  
Author(s):  
Hohyun Lee ◽  
Daryoosh Vashaee ◽  
Xiaowei Wang ◽  
Giri Joshi ◽  
Gaohua Zhu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Energy Conversion ◽  
Silicon Germanium ◽  
Figure Of Merit ◽  
Waste Heat ◽  
Electrical Energy ◽  
Energy Conversion Efficiency ◽  
Thermoelectric Effects ◽  
Thermoelectric Transport ◽  
Potential Applications

Direct energy conversion between heat and electrical energy based on thermoelectric effects is attractive for potential applications in waste heat recovery and environmentally-friendly refrigeration. The energy conversion efficiency depends on the dimensionless figure of merit of thermoelectric materials, ZT, which is proportional to the electrical conductivity, the square of the Seebeck coefficient, and the inverse of the thermal conductivity. Currently, the low ZT values of available materials restrict the applications of this technology. However, significant enhancements in ZT were recently reported in nanostructured materials such as superlattices mainly due to their low thermal conductivities. According to recent studies, the reduced thermal conductivity of nanostructures is attributed to the large number of interfaces at which phonons are scattered. Based on this idea, nanocomposites are expected to have a lower thermal conductivity than their bulk counterparts with low fabrication cost just by mixing nano sized particles. In this work, we will discuss mechanisms of thermoelectric transport via modeling and provide experimental evidence on the enhancement of thermoelectric figure of merit in SiGe-based nanocomposites.

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.

Self-Sustained, Independent Trifold Solar Energy Conversion System for Isolated Locations in Hot Climate Areas

2014 ◽  
Vol 659 ◽  
pp. 421-424 ◽  
Author(s):  
Aristotel Popescu ◽  
Ema Carmen Panaite ◽  
Ana Georgiana Lupu ◽  
Marius Atanasiu ◽  
Christos Vlachokostas ◽  
...  
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Waste Heat ◽  
Strong Dependence ◽  
Solar Energy Conversion ◽  
Photovoltaic Cell ◽  
Total Efficiency ◽  
Hot Climate ◽  
Cell Conversion

This paper proposes two configurations for a hybrid solar energy conversion device that can be used as a self-sustained, independent power generation system in isolated locations in hot climate areas. Given the strong dependence of photovoltaic cell conversion efficiency on operation temperature, the cooling of the backside becomes imperative, increasing not only electrical, but also the overall solar energy conversion efficiency. The hybrid system provides now electricity and hot hater for domestic applications. To further improve electrical efficiency, a thermoelectric generator module is added to the system, harvesting the thermal energy that otherwise would be regarded as waste heat and rejected to environment. The optimization of the parameters that influence the total efficiency demonstrate the strong connection between the three parts of the system, PV-TE-DHW.

Thermodynamic and exergy efficiencies of magnetocaloric energy conversion utilising industrial waste heat

2012 ◽  
Vol 10 (4) ◽  
pp. 365 ◽  
Author(s):  
D Vuarnoz ◽  
A. Kitanovski ◽  
C. Gonin ◽  
P.W. Egolf
Keyword(s):  
Energy Conversion ◽  
Industrial Waste ◽  
Waste Heat ◽  
Industrial Waste Heat

scholarly journals Combined Gas and Steam Cycle for a Gas-Cooled Solar Tower Power Plant

1981 ◽  
Author(s):  
B. Becker ◽  
H. H. Finckh ◽  
R. Meyer-Pittroff
Keyword(s):  
Power Plant ◽  
Energy Conversion ◽  
Gas Turbine ◽  
Steam Generator ◽  
Solar Power ◽  
Waste Heat ◽  
Radiant Energy ◽  
Combined Cycle ◽  
Conversion System ◽  
Energy Conversion System

In gas-cooled solar power plants the radiant energy of the sun is transferred to the cycle fluid in a cavity type solar receiver and converted into electric energy by means of a combined gas and steam turbine cycle incorporating a waste heat steam generator. The design and optimization of the energy conversion system in accordance with solar-specific considerations are described with particular regard to the gas turbine. In designing the energy conversion system several variants on the combined cycle with waste heat steam generator are investigated and special measures for the improvement of the cycle efficiency, such as the refinement of the steam process through the addition of pressure stages are introduced. It is demonstrated that the solar power plant meets the requirements both for straight solar and constant load operation with fossil fuel substitution. In order to establish the possibilities of attaining high part-load efficiencies in straight solar operation, two modes, variable and constant speed of the gas turbine, are compared with one another.

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