scholarly journals Method for Predicting Thermoelectric Module Efficiency Using MATLAB/Simulink

2021 ◽  
Vol 59 (11) ◽  
pp. 829-837
Author(s):  
Nayoung Lee ◽  
Sungwook Ye ◽  
Rahman Jamil Ur ◽  
Jang-Yeul Tak ◽  
Jung Young Cho ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Thermoelectric Module ◽  
Simulation Models ◽  
Thermoelectric Efficiency ◽  
Matlab Simulink ◽  
Thermoelectric Modules ◽  
Properties Of Materials ◽  
Module Efficiency

Development new high-performance thermoelectric materials for more efficient power generation systems and eco-friendly refrigerating systems has been challenging. Over the past few decades, thermoelectric studies have been focused on increasing the thermoelectric properties of materials. However, for conventional applications, developing of thermoelectric devices or modules with lower cost and simpler fabrication processes is also important. Simulation models that can predict the thermoelectric efficiency of modules using the thermoelectric properties of materials are needed for this purpose. In this study, we developed a simple model for calculating the efficiency of thermoelectric modules using MATLAB/Simulink. In this model, the temperature difference between the hot source and heat sink was fixed to ensure the precise comparisons of thermoelectric efficiency. The electric resistivity and Seebeck coefficient of thermoelectric materials was used in order to predict the efficiency of the thermoelectric modules. Then, the efficiency of the thermoelectric modules was verified using measured values which had been reported in prior experimental works. In this study, the simulated values were higher than the real thermoelectric effiency values. To address this, the simulations should consider the thermal resistance or electric contact resistance between the thermoelectric materials and electrodes.

Thallium-Free Thermoelectric Materials with Extremely Low Thermal Conductivity

2007 ◽  
Vol 1044 ◽  
Author(s):  
Shinsuke Yamanaka ◽  
Ken Kurosaki ◽  
Anek Charoenphakdee ◽  
Hideaki Mastumoto ◽  
Hiroaki Muta
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Next Generation ◽  
Practical Application ◽  
Low Thermal Conductivity ◽  
New Class ◽  
Thallium Compounds ◽  
Thallium Tellurides

AbstractWith the goal of developing high-performance bulk thermoelectric materials, we have characterized ternary silver thallium tellurides. The ternary silver thallium tellurides exhibit extremely low thermal conductivity (<0.5 Wm−1K−1) and consequently their thermoelectric performance is excellent. Although the extremely low thermal conductivity materials, as typified by the ternary silver thallium tellurides, would be a new class of next-generation thermoelectric materials, thallium compounds are unsuitable for practical application because of their toxicity. Against such a background, we are currently exploring thallium-free thermoelectric materials with extremely low thermal conductivity. In this paper, we will briefly summarize the thermoelectric properties of ternary thallium tellurides obtained in our group. Further experiments aimed at improving the ZT of these materials will be presented. Finally, we will propose two candidates: Ag8GeTe6 and Ga2Te3 as thallium-free low thermal conductivity materials.

scholarly journals Research Advances of Typical Two Dimensional Layered Thermoelectric Materials

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Haihua HUANG ◽  
Xiaofeng FAN
Keyword(s):  
Structural Properties ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Electronic Devices ◽  
Layered Materials ◽  
Two Dimensional ◽  
The Past ◽  
2D Layered Materials ◽  
Potential Applications ◽  
Properties Of Materials

Thermoelectric technologies have caught our intense attention due to their ability of heat conversion into electricity. The considerable efforts have been taken to develop and enhance thermoelectric properties of materials over the past several decades. Recently, two-dimensional layered materials are making the promise for potential applications of thermoelectric devices because of the excellent physical and structural properties. Here, a comprehensive coverage about recent progresses in thermoelectric properties of typical two dimensional (2D) layered materials, including the theoretical and experimental results, is provided. Moreover, the potential applications of 2D thermoelectric materials are also involved. These results indicate that the development of 2D thermoelectric materials take a key role in the flexible electronic devices with thermoelectric technologies.

Ensemble-machine-learning-based correlation analysis of internal and band characteristics of thermoelectric materials

2020 ◽  
Vol 8 (37) ◽  
pp. 13079-13089
Author(s):  
Lihao Chen ◽  
Ben Xu ◽  
Jia Chen ◽  
Ke Bi ◽  
Changjiao Li ◽  
...  
Keyword(s):  
Machine Learning ◽  
Electrical Conductivity ◽  
Correlation Analysis ◽  
Seebeck Coefficient ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Ensemble Machine Learning ◽  
Properties Of Materials

Machine learning can significantly help to predict the thermoelectric properties of materials, such as the Seebeck coefficient and electrical conductivity.

Thermoelectric properties of germanium telluride with fine-grained structure

2020 ◽  
Vol 11 ◽  
pp. 15-25
Author(s):  
L. D. Ivanova ◽  
◽  
Yu. V. Granatkina ◽  
I. Yu. Nikhezina ◽  
A. G. Malchev ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Melt Spinning ◽  
High Energy ◽  
Grain Structure ◽  
Thermoelectric Efficiency ◽  
Fine Grained ◽  
Germanium Telluride ◽  
Fine Grained Structure ◽  
Properties Of Materials ◽  
P Type

The microstructure and thermoelectric properties of materials based on germanium telluride p-type conductivity doped with copper and bismuth obtained by hot pressing of three types powders prepared by grinding an ingot to a size of hundreds microns (0.315  mm) to hundreds of nanometers (mechanical activation) in planetary high-energy mill and melt spinning were investigated. The microstructure of the samples were analyzed by optical and electron scanning microscopies. The nanoscale grain structure of these samples was established. The thermoelectric characteristics of the materials: Seebeck coefficient, electrical and thermal conductivities, were measured both at room temperature and in the temperature range of 100 – 800 K. The slopes of these dependencies are estimated. The coefficient of thermoelectric figure of merit is calculated. The higher thermoelectric efficiency (ZT = 1.5 at 600 K) was received for the samples hot-pressed from granules, prepared by melt spinning.

scholarly journals Towards tellurium-free thermoelectric modules for power generation from low-grade heat

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Pingjun Ying ◽  
Ran He ◽  
Jun Mao ◽  
Qihao Zhang ◽  
Heiko Reith ◽  
...  
Keyword(s):  
Power Generation ◽  
Thermoelectric Properties ◽  
Conversion Efficiency ◽  
High Performance ◽  
State Of The Art ◽  
Low Grade ◽  
Thermoelectric Modules ◽  
P Type ◽  
Low Grade Heat ◽  
Promising Source

AbstractThermoelectric technology converts heat into electricity directly and is a promising source of clean electricity. Commercial thermoelectric modules have relied on Bi2Te3-based compounds because of their unparalleled thermoelectric properties at temperatures associated with low-grade heat (<550 K). However, the scarcity of elemental Te greatly limits the applicability of such modules. Here we report the performance of thermoelectric modules assembled from Bi2Te3-substitute compounds, including p-type MgAgSb and n-type Mg3(Sb,Bi)2, by using a simple, versatile, and thus scalable processing routine. For a temperature difference of ~250 K, whereas a single-stage module displayed a conversion efficiency of ~6.5%, a module using segmented n-type legs displayed a record efficiency of ~7.0% that is comparable to the state-of-the-art Bi2Te3-based thermoelectric modules. Our work demonstrates the feasibility and scalability of high-performance thermoelectric modules based on sustainable elements for recovering low-grade heat.

scholarly journals Crystallinity-Dependent Thermoelectric Properties of a Two-Dimensional Coordination Polymer: Ni3(2,3,6,7,10,11-hexaiminotriphenylene)2

Polymers ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 962 ◽  
Author(s):  
Yoshiyuki Nonoguchi ◽  
Dai Sato ◽  
Tsuyoshi Kawai
Keyword(s):  
Coordination Polymer ◽  
Conducting Polymers ◽  
Electronic Properties ◽  
Thermoelectric Properties ◽  
Standard Method ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Two Dimensional ◽  
Thermoelectric Transport ◽  
Systematic Feedback

The evaluation of thermoelectric properties has recently become a standard method for revealing the electronic properties of conducting polymers. Herein we report on the thermoelectric properties of a two-dimensional coordination polymer pellets. The pellets of Ni3(2,3,6,7,10,11-hexaiminotriphenylene)2, which has recently been developed, show n-type thermoelectric transport, dependent on crystallinity. The present results provide systematic feedback to the guideline for high-performance molecular thermoelectric materials.

Thermoelectric Properties of Zinc-Doped Cu5Sn2Se7 and Cu5Sn2Te7

2021 ◽  
Author(s):  
Cheryl Sturm ◽  
Leilane R. Macario ◽  
Takao Mori ◽  
Holger Kleinke
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Waste Heat ◽  
Low Thermal Conductivity ◽  
Copper Chalcogenides

High-performance thermoelectric materials are currently being sought after to recycle waste heat. Copper chalcogenides in general are materials of great interest because of their naturally low thermal conductivity and readily...

Thermoelectric Properties of Bismuth Telluride Based Materials Prepared by Powder Metallurgy Processing

2007 ◽  
Vol 336-338 ◽  
pp. 864-867
Author(s):  
Wei Ren ◽  
Xue Quan Liu ◽  
Xiao Lin Wang ◽  
Hong Yi Jiang
Keyword(s):  
Powder Metallurgy ◽  
Mechanical Strength ◽  
Thermoelectric Properties ◽  
Bismuth Telluride ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Sintering Temperature ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
P Type

Polycrystalline samples of Bi2Te3 based alloys were prepared by powder metallurgy processing including a melting-grinding and a sintering procedure of compacted pellets. Two sintering procedures as hot-pressing and spark plasma sintering (SPS) were employed. The thermoelectric properties and mechanical strength were measured in all case. Thermoelectric properties for p-type (Bi0.25Sb0.75)2Te3 and n-type Bi2(Te0.2Se0.8)3 changed with sintering temperature in both sintering methods. Mechanical strength and relative density increase with sintering temperature in two sintering procedures. The results firmly suggest that both sintering procedures are promising to obtain high performance thermoelectric materials.

scholarly journals Electronic and Thermoelectric Properties of V2O5, MgV2O5, and CaV2O5

Coatings ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 453 ◽  
Author(s):  
Xiaofei Sheng ◽  
Zhuhong Li ◽  
Yajuan Cheng
Keyword(s):  
Electrical Conductivity ◽  
Seebeck Coefficient ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Van Der Waals ◽  
Thermoelectric Performance ◽  
Extreme Condition ◽  
Electronic Band ◽  
Classical Transport

Developing new thermoelectric materials with high performance can broaden the thermoelectric family and is the key to fulfill extreme condition applications. In this work, we proposed two new high-temperature thermoelectric materials—MgV2O5 and CaV2O5—which are derived from the interface engineered V2O5. The electronic and thermoelectric properties of V2O5, MgV2O5, and CaV2O5 were calculated based on first principles and Boltzmann semi-classical transport equations. It was found that although V2O5 possessed a large Seebeck coefficient, its large band gap strongly limited the electrical conductivity, hence hindering it from being good thermoelectric material. With the intercalation of Mg and Ca atoms into the van der Waals interfaces of V2O5, i.e., forming MgV2O5 and CaV2O5, the electronic band gaps could be dramatically reduced down to below 0.1 eV, which is beneficial for electrical conductivity. In MgV2O5 and CaV2O5, the Seebeck coefficient was not largely affected compared to V2O5. Consequently, the thermoelectric figure of merit was expected to be improved noticeably. Moreover, the intercalation of Mg and Ca atoms into the V2O5 van der Waals interfaces enhanced the anisotropic transport and thus provided a possible way for further engineering of their thermoelectric performance by nanostructuring. Our work provided theoretical guidelines for the improvement of thermoelectric performance in layered oxide materials.

An over 10% module efficiency using non-Bi2Te3 thermoelectric materials for recovering heat of <600 K

2021 ◽  
Author(s):  
Zhonglin Bu ◽  
Xinyue Zhang ◽  
Yixin Hu ◽  
Zhiwei Chen ◽  
Siqi Lin ◽  
...  
Keyword(s):  
Solid State ◽  
Thermoelectric Materials ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Low Grade ◽  
Thermoelectric Modules ◽  
Module Efficiency

Thermoelectric technology offers unique advantages of all solid-state, silent and emission-free for waste-heat recovery applications. Yet existing thermoelectric modules, in particular for recovering low-grade but abundant heat of <600 K,...

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