Accuracy Enhancement of Thermoelectric Simulation by Modeling the Electrical Contact

2016 ◽  
Vol 8 (4) ◽  
Author(s):  
Min Chen ◽  
Junling Gao ◽  
Zhengdong Kang ◽  
Jianzhong Zhang
Keyword(s):  
Statistical Modeling ◽  
System Simulation ◽  
Electrical Contact ◽  
Numerical Implementation ◽  
Temperature Dependent ◽  
Accuracy Improvement ◽  
Thermoelectric Modules ◽  
Accuracy Enhancement ◽  
Interface Resistance ◽  
Experimental Findings

The main objective of this study is to numerically analyze the uncertainty of the electrical interface resistance in thermoelectric modules (TEMs) and its contribution to the error of practical device and system simulation. To improve the simulation, the numerical implementation of the interface resistance in TEMs of any size, especially its temperature-dependent characteristics, is critical in the thermoelectric modeling. Using the electrothermal analogy and the PSpice simulator as the simulation baseline, the proposed nonlinear and statistical modeling of the interface resistance is examined and supported through extensive comparisons between experimental findings and numerical results. Considerable accuracy improvement is obtained for a single TEM and a system consisting of a number of interconnected TEMs.

scholarly journals Mechanistic details of the MnO+ + H2/D2 reaction through temperature-dependent kinetics and statistical modeling

2019 ◽  
Vol 435 ◽  
pp. 26-33 ◽  
Author(s):  
Brendan C. Sweeny ◽  
Hanqing Pan ◽  
Shaun G. Ard ◽  
Nicholas S. Shuman ◽  
Albert A. Viggiano ◽  
...  
Keyword(s):  
Statistical Modeling ◽  
Temperature Dependent

Numerical Implementation of a Multi-Physical Fields Coupling Constitute Model

2013 ◽  
Vol 457-458 ◽  
pp. 354-357
Author(s):  
Yu Jie Sun ◽  
Qing Chun Cui ◽  
Suo Huai Zhang ◽  
Li Jun Yan
Keyword(s):  
Material Properties ◽  
General Purpose ◽  
Computational Method ◽  
Numerical Implementation ◽  
Temperature Dependent ◽  
Working Process ◽  
Finite Element Program ◽  
Element Program ◽  
User Material Subroutine ◽  
Constitute Model

The objective of this paper provides a numerical implementation procedure of thermo-metallurgical-mechanical constitute equation based on additively decomposition of strain rate. Together with phase transformation kinetics, the macro material properties are determined by assigning temperature dependent material properties to each phase and by applying mixture rule to combine. Then the constitute equation is implemented into general purpose implicit finite element program via user material subroutine. The effectiveness of developed computational method is confirmed by a Satoh test simulation. Simulation of Satoh test demonstrates that transformation induce plasticity has significant effect of the evolution of residual stress and can not be neglected for alloy steel during hot working process.

A Feasibility Investigation on Improving Structural Integrity of Thermoelectric Modules With Varying Geometry

2012 ◽  
Author(s):  
Ugur Erturun ◽  
Karla Mossi
Keyword(s):  
Power Generation ◽  
Material Properties ◽  
Thermal Stresses ◽  
Structural Integrity ◽  
Temperature Dependent ◽  
Thermoelectric Modules ◽  
Geometry Model ◽  
Von Mises ◽  
Von Mises Stresses ◽  
Ansys Workbench

This study investigates the feasibility of improving the structural integrity of thermoelectric modules (TEMs) with varying geometry. For this purpose, six different TEM models with various thermoelectric leg geometries were designed and modeled in order to perform a thermal stress FEA using ANSYS Workbench. Temperature dependent material properties were used since some properties such as coefficients of thermal expansion change with temperature. Significant decrease in thermal stresses and leg deformations were observed with some models. Particularly, the cylindrical TE leg geometry model has approximately 54% lower Von Mises stresses (294MPa) and 13% lower TE leg deformations (3.9μm) than those of the typical TE leg geometry model (635MPa and 4.5μm). Power generation analyses of the models were performed to evaluate the effect of new TE leg geometries on the performance. TEM model with cylindrical TE leg geometry has the highest power generation (29.3mW) among all the models.

Activation of Methane by FeO+: Determining Reaction Pathways through Temperature-Dependent Kinetics and Statistical Modeling

2014 ◽  
Vol 118 (11) ◽  
pp. 2029-2039 ◽  
Author(s):  
Shaun G. Ard ◽  
Joshua J. Melko ◽  
Vladimir G. Ushakov ◽  
Ryan Johnson ◽  
Joseph A. Fournier ◽  
...  
Keyword(s):  
Statistical Modeling ◽  
Reaction Pathways ◽  
Temperature Dependent

Role of Spin in the Catalytic Oxidation of CO by N2O Enabled by Co+: New Insights from Temperature-Dependent Kinetics and Statistical Modeling

2020 ◽  
Vol 124 (39) ◽  
pp. 7966-7972
Author(s):  
David C. McDonald II ◽  
Brendan C. Sweeny ◽  
Albert A. Viggiano ◽  
Nicholas S. Shuman ◽  
Shaun G. Ard
Keyword(s):  
Catalytic Oxidation ◽  
Statistical Modeling ◽  
Oxidation Of Co ◽  
Temperature Dependent ◽  
Catalytic Oxidation Of Co

scholarly journals Determination of Electrical Contact Resistivity in Thermoelectric Modules (TEMs) From Module-Level Measurements

2012 ◽  
Vol 2 (4) ◽  
pp. 668-676 ◽  
Author(s):  
S. Ravi Annapragada ◽  
Todd Salamon ◽  
Paul Kolodner ◽  
Marc Hodes ◽  
Suresh V. Garimella
Keyword(s):  
Electrical Contact ◽  
Contact Resistivity ◽  
Thermoelectric Modules

A Viscoplastic Constitutive Model for Polyurethane Foams

2006 ◽  
Author(s):  
Mike Neilsen ◽  
Wei-Yang Lu ◽  
Bill Olsson ◽  
Terry Hinnerichs
Keyword(s):  
Large Deformation ◽  
Mechanical Response ◽  
Polyurethane Foams ◽  
Plasticity Model ◽  
Load Path ◽  
Temperature Dependent ◽  
Rigid Polyurethane Foams ◽  
Foam Model ◽  
Series Of Experiments ◽  
Experimental Findings

A series of experiments was recently performed to characterize the mechanical response of several different rigid polyurethane foams to large deformation. In these experiments, the effects of load path, loading rate, and temperature were investigated. Results from these experiments indicated that rigid polyurethane foams exhibit significant volumetric and deviatoric plasticity when they are compressed. Based on these experiments, a foam plasticity model that captures volumetric and deviatoric plasticity was developed. This model has a yield surface that is an ellipsoid about the hydrostat. These polymeric foams were also found to be very strain-rate and temperature dependent. Thus, a new viscoplastic foam model was developed to describe the mechanical response of these foams to large deformation at a variety of temperatures and strain rates. This paper includes a description of recent experiments and experimental findings. Next, development of a foam plasticity model and a viscoplastic foam model is described. Finite element simulations with the new models are compared with experimental results to show behavior that can and cannot be captured with these models.

Catalytic Oxidation of CO by N2O Enabled by Al2O2/3+: Temperature Dependent Kinetics and Statistical Modeling

2020 ◽  
Vol 124 (9) ◽  
pp. 1705-1711
Author(s):  
Brendan C. Sweeny ◽  
David C. McDonald ◽  
Jennifer L. Poutsma ◽  
John C. Poutsma ◽  
Nicholas S. Shuman ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Statistical Modeling ◽  
Oxidation Of Co ◽  
Temperature Dependent ◽  
Catalytic Oxidation Of Co

An approximate and efficient characterization method for temperature-dependent parameters of thermoelectric modules

2019 ◽  
Vol 180 ◽  
pp. 584-597 ◽  
Author(s):  
Hailong He ◽  
Weiwei Liu ◽  
Yi Wu ◽  
Mingzhe Rong ◽  
Peng Zhao ◽  
...  
Keyword(s):  
Temperature Dependent ◽  
Thermoelectric Modules
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