Interfacial advances yielding high efficiencies for thermoelectric devices

2020 ◽  
Author(s):  
Wenjie Wu ◽  
Guangkun Ren ◽  
Xuxuan Chen ◽  
Yinke Liu ◽  
Zhifang Zhou ◽  
...  
Keyword(s):  
Power Generation ◽  
Conversion Efficiency ◽  
Thermoelectric Devices

Developing thermoelectric (TE) applications is promising upon great progresses in recent decades, yet there are still some limits existing for implementing TE power generation, due to the inferior conversion efficiency...

scholarly journals Thermoelectric Generation with Impinging Nano-Jets

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 492
Author(s):  
Fatih Selimefendigil ◽  
Hakan F. Oztop ◽  
Mikhail A. Sheremet
Keyword(s):  
Fluid Dynamics ◽  
Power Generation ◽  
Computational Fluid Dynamics ◽  
Reynolds Number ◽  
Conversion Efficiency ◽  
Reynolds Numbers ◽  
Thermoelectric Generation ◽  
Volume Fractions ◽  
Water Jets ◽  
Conversion Efficiencies

In this study, thermoelectric generation with impinging hot and cold nanofluid jets is considered with computational fluid dynamics by using the finite element method. Highly conductive CNT particles are used in the water jets. Impacts of the Reynolds number of nanojet stream combinations (between (Re1, Re2) = (250, 250) to (1000, 1000)), horizontal distance of the jet inlet from the thermoelectric device (between (r1, r2) = (−0.25, −0.25) to (1.5, 1.5)), impinging jet inlet to target surfaces (between w2 and 4w2) and solid nanoparticle volume fraction (between 0 and 2%) on the interface temperature variations, thermoelectric output power generation and conversion efficiencies are numerically assessed. Higher powers and efficiencies are achieved when the jet stream Reynolds numbers and nanoparticle volume fractions are increased. Generated power and efficiency enhancements 81.5% and 23.8% when lowest and highest Reynolds number combinations are compared. However, the power enhancement with nanojets using highly conductive CNT particles is 14% at the highest solid volume fractions as compared to pure water jet. Impacts of horizontal location of jet inlets affect the power generation and conversion efficiency and 43% variation in the generated power is achieved. Lower values of distances between the jet inlets to the target surface resulted in higher power generation while an optimum value for the highest efficiency is obtained at location zh = 2.5ws. There is 18% enhancement in the conversion efficiency when distances at zh = ws and zh = 2.5ws are compared. Finally, polynomial type regression models are obtained for estimation of generated power and conversion efficiencies for water-jets and nanojets considering various values of jet Reynolds numbers. Accurate predictions are obtained with this modeling approach and it is helpful in assisting the high fidelity computational fluid dynamics simulations results.

Highly Efficient Transverse Thermoelectric Devices with Re4Si7 Crystals

2021 ◽  
Author(s):  
Michael R. Scudder ◽  
Bin He ◽  
Yaxian Wang ◽  
Akash Rai ◽  
David Cahill ◽  
...  
Keyword(s):  
Power Generation ◽  
Thermoelectric Power ◽  
Thermoelectric Devices ◽  
Thermoelectric Power Generation ◽  
Highly Efficient ◽  
Semiconductor Contacts

The principal challenges in current thermoelectric power generation modules is the availability of stable, diffusion-resistant, lossless electrical and thermal metal-semiconductor contacts that do not degrade at the hot end nor...

Metal-like electrical conductivity in LaxSr2−xTiMoO6 oxides for high temperature thermoelectric power generation

2017 ◽  
Vol 46 (18) ◽  
pp. 5872-5879 ◽  
Author(s):  
Mandvi Saxena ◽  
Tanmoy Maiti
Keyword(s):  
Power Generation ◽  
Electrical Conductivity ◽  
High Temperature ◽  
Energy Conversion ◽  
Thermoelectric Power ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency ◽  
Power Generators ◽  
Thermoelectric Power Generation

Increasing electrical conductivity in oxides, which are inherently insulators, can be a potential route in developing oxide-based thermoelectric power generators with higher energy conversion efficiency.

Realizing high-efficiency power generation in low-cost PbS-based thermoelectric materials

2020 ◽  
Vol 13 (2) ◽  
pp. 579-591 ◽  
Author(s):  
Binbin Jiang ◽  
Xixi Liu ◽  
Qi Wang ◽  
Juan Cui ◽  
Baohai Jia ◽  
...  
Keyword(s):  
Power Generation ◽  
Conversion Efficiency ◽  
Thermoelectric Materials ◽  
High Efficiency ◽  
Low Cost ◽  
Thermoelectric Module ◽  
High Conversion ◽  
High Conversion Efficiency

A high conversion efficiency of 11.2% was realized in a low-cost PbS-based segmented thermoelectric module.

scholarly journals Application of Thermoelectric Devices to Fuel Cell Power Generation: Demonstration and Evaluation

2004 ◽  
Author(s):  
John Huston ◽  
Chris Wyatt ◽  
Chris Nichols ◽  
Michael J. Binder ◽  
Franklin H. Holcomb
Keyword(s):  
Power Generation ◽  
Fuel Cell ◽  
Thermoelectric Devices

scholarly journals Nanostructures GaAs Solar Cells

2020 ◽  
Author(s):  
Mohammad Nur E Alam ◽  
Narottam Das
Keyword(s):  
Power Generation ◽  
Solar Cells ◽  
Conversion Efficiency ◽  
Human Mobility ◽  
Incident Light ◽  
Front Surface ◽  
Pv Systems ◽  
Energy Demands ◽  
Power Generation Technology ◽  
Pv Power Generation

At present, the world is now passing a very far different time than normal situation due to the COVID-19 pandemic crisis. The global life-style and human civilization is currently progressing with down-stream that affecting almost every sectors necessary for human civilizations except the current environmental situation. To control the COVID-19 spreading, most of the countries are following lockdown process that reduces human mobility, thus reducing the CO2 emission to the environment. Though the COVID-19 pandemic is a blessing for the present environment, however, the post-COVID world will face a massive thrust of energy and only conventional energy resources may not be enough to mitigate the energy demands. Solar power generation technology mainly the photovoltaic (PV) systems and their advancement can be the leading possibilities to minimize the gap between the power demand and generation. It is now time to think how we can improve the PV power generation in future and the post-COVID world. In this encyclopaedia communication, we report on Nano-technological approach to improve the conversion efficiency of GaAs solar cells. We have designed and optimized several types of nano-structured assemblies that can be implemented to reduce the front surface incident light reflection losses thus can assist to improve the conversion efficiency of GaAs solar cells.

The Research on Solar Cells Based on Improving Conversion Efficiency

2015 ◽  
Vol 730 ◽  
pp. 173-177
Author(s):  
Yu Wen Tang
Keyword(s):  
Power Generation ◽  
Solar Cells ◽  
Solar Cell ◽  
Solar Energy ◽  
Conversion Efficiency ◽  
Photovoltaic Effect ◽  
New Technology ◽  
Electrical Energy ◽  
Solar Thermal Energy ◽  
Photovoltaic Power

Solar energy is an inexhaustible and renewable energy without environmental pollution. Solar energy can be used in three kinds of forms: solar thermal energy, photochemical conversion and photovoltaic power generation. Among these, the final form of photovoltaic power generation is electricity which can be transported, applied and stored conveniently. On the basis of photovoltaic effect, solar cell is developed as a new technology to convert light energy into electrical energy using semiconductor. Up to now the two key problems of the development of solar cells are how to improve the conversion efficiency and reduce cost. Therefore, the material and production technology used for solar cells are discussed based on improving conversion efficiency in this article.

Thermoelectric Generators Embedded in Microelectronic Chip

2012 ◽  
Author(s):  
Owen Sullivan ◽  
Saibal Mukhopadhyay ◽  
Satish Kumar
Keyword(s):  
Power Generation ◽  
Heat Flux ◽  
Power Consumption ◽  
Conversion Efficiency ◽  
Waste Heat ◽  
Average Power ◽  
Total Power ◽  
Battery Life ◽  
Thermoelectric Generators ◽  
Useful Power

Thermoelectric generators (TEGs) can significantly improve the net power consumption and battery life of the mobile devices or high performance devices by generating power from the waste heat of these devices. Recent advancements show that the ultrathin thermoelectric devices can be fabricated and integrated within a microelectronic package. This paper first investigates the power generation by a single ultrathin TEG embedded within a micro-electronic package considering several key factors such as load resistance, chip heat flux, and proximity of the TEG to chip. We observe that the power generation from TEGs increases with increasing background heat flux on chip or when TEGs are moved closer to the chip. After the investigation of a single TEG, an array of embedded TEGs is considered in order to analyze the influence of multiple TEGs on total power generation and conversion efficiency. Increasing the number of TEGs from one to nine increase the useful power generation from 72.9 mW to 378.4 mW but decreases the average conversion efficiency from 0.47% to 0.32%. This suggests that average power generated per TEG gradually decrease from 72.9 mW to 42.0 mW when number of TEGs is increased from one to nine. However, the total useful power generated using nine TEGs is significant and emphasize the benefits of using embedded TEGs to reduce net power consumption in electronics packages.

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