Reduction and optimisation of thermal models using Kirchhoff network theory, implementation to the thermal model of an induction machine

2002 ◽  
Author(s):  
Marc Broussely ◽  
Yves Bertin ◽  
Patrick Lagonotte
Keyword(s):  
Network Theory ◽  
Thermal Model ◽  
Induction Machine ◽  
Thermal Models

scholarly journals Particle Production in Ultrarelativistic Heavy-Ion Collisions: A Statistical-Thermal Model Review

2013 ◽  
Vol 2013 ◽  
pp. 1-27 ◽  
Author(s):  
S. K. Tiwari ◽  
C. P. Singh
Keyword(s):  
Thermal Model ◽  
Heavy Ion Collisions ◽  
Particle Production ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Transverse Mass ◽  
Current Status ◽  
Thermal Models ◽  
Ion Collisions ◽  
Ultrarelativistic Heavy Ion Collisions

The current status of various thermal and statistical descriptions of particle production in the ultrarelativistic heavy-ion collisions experiments is presented in detail. We discuss the formulation of various types of thermal models of a hot and dense hadron gas (HG) and the methods incorporated in the implementing of the interactions between hadrons. It includes our new excluded-volume model which is thermodynamically consistent. The results of the above models together with the experimental results for various ratios of the produced hadrons are compared. We derive some new universal conditions emerging at the chemical freeze-out of HG fireball showing independence with respect to the energy as well as the structure of the nuclei used in the collision. Further, we calculate various transport properties of HG such as the ratio of shear viscosity-to-entropy using our thermal model and compare with the results of other models. We also show the rapidity as well as transverse mass spectra of various hadrons in the thermal HG model in order to outline the presence of flow in the fluid formed in the collision. The purpose of this review article is to organize and summarize the experimental data obtained in various experiments with heavy-ion collisions and then to examine and analyze them using thermal models so that a firm conclusion regarding the formation of quark-gluon plasma (QGP) can be obtained.

Thermal Model of Printed Circuit Board Plated-Through Hole under One-Sided Heating Conditions

2021 ◽  
Vol 26 (5) ◽  
pp. 426-431
Author(s):  
V.A. Sergeev ◽  
◽  
A.M. Khodakov ◽  
M.Yu. Salnikov ◽  
◽  
...  
Keyword(s):  
Quality Control ◽  
Thermal Resistance ◽  
Thermal Model ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Thermal Models ◽  
Printed Circuit ◽  
Plated Through Hole ◽  
Through Hole

Thermal methods of quality control of the plated-through hole (PTH) of printed circuit board (PCB) are based on thermal models. However, known thermal models of PTH take no account of heat transfer to PCB material thus not allowing for PTH heat characteristic tying up with adhesion quality. In this work, an axisymmetric thermal model of a single-layer PCB PTH under one-sided heating conditions is considered. It was shown that the ratio of the temperature increments of the upper (heated) and lower end of the PTH in the considered range of heating power does not depend on the power level. A linear thermal equivalent scheme of the PTH has been proposed, which includes the longitudinal thermal resistance of the PTH metallization, de-termined by the parameters and quality of the metallization layer, the thermal resistance, which determines the convection heat exchange between the ends of the PTH with the adjacent PCB surface and the environment, and the thermal resistance of the area of the PCB material adjacent to the PTH, depending on the quality of the metallization adhesion and the PCB dielectric. Thermal equivalent circuit parameters determined by the ratio of the temperature increment of the upper and lower ends of the PTH and their difference can serve as the basis for the development of a nondestructive inspection procedure for PTH quality control by way of its unilateral heating, for example, by a laser beam.

Induction machine deep-bar and thermal models for sensorless IRFOC application

2005 ◽  
Vol 152 (3) ◽  
pp. 479 ◽  
Author(s):  
M.J. Duran ◽  
J.L. Duran ◽  
F.M. Perez ◽  
J. Fernandez
Keyword(s):  
Induction Machine ◽  
Thermal Models

scholarly journals Deconfinement and Freezeout Boundaries in Equilibrium Thermal Models

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Abdel Nasser Tawfik ◽  
Muhammad Maher ◽  
A. H. El-Kateb ◽  
Sara Abdelaziz
Keyword(s):  
Thermal Model ◽  
Sigma Model ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Baryon Density ◽  
Linear Sigma Model ◽  
Model Calculations ◽  
Thermal Models ◽  
High Energies ◽  
Baryonic Density

In different approaches, the temperature-baryon density plane of QCD matter is studied for deconfinement and chemical freezeout boundaries. Results from various heavy-ion experiments are compared with the recent lattice simulations, the effective QCD-like Polyakov linear-sigma model, and the equilibrium thermal models. Along the entire freezeout boundary, there is an excellent agreement between the thermal model calculations and the experiments. Also, the thermal model calculations agree well with the estimations deduced from the Polyakov linear-sigma model (PLSM). At low baryonic density or high energies, both deconfinement and chemical freezeout boundaries are likely coincident, and therefore, the agreement with the lattice simulations becomes excellent as well, while at large baryonic density, the two boundaries become distinguishable forming a phase where hadrons and quark-gluon plasma likely coexist.

Thermal Model and Analysis of Wound-Rotor Induction Machine

2013 ◽  
Vol 49 (5) ◽  
pp. 2078-2085 ◽  
Author(s):  
Aldo Boglietti ◽  
Andrea Cavagnino ◽  
Mircea Popescu ◽  
Dave Staton
Keyword(s):  
Thermal Model ◽  
Induction Machine

scholarly journals Thermal Modelling and Analysis of A 10HP Induction Machine Using the Lumped Parameter Approach

2021 ◽  
Vol 13 (6) ◽  
Author(s):  
Oti S.Ejiofor ◽  
◽  
Awah Chukwemeka ◽  
Chibuzo Nnonyelu ◽  
Ogbonnaya I.Okoro ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Life Span ◽  
Thermal Model ◽  
Research Work ◽  
Induction Machine ◽  
Thermal Modelling ◽  
Thermal Limits ◽  
Lumped Parameter ◽  
Parameter Approach ◽  
Different Parts

The essence of this research work is to develop a thermal model for an induction machine that will enable the prediction of temperature in different parts of the machine. This is very important first to the manufacturer or designer of an induction machine because with these predictions one can decide on the insulation class limits the machine belongs to. Also modern trends in the construction of machines is moving in the direction of making machines with reduced weights, costs and increased efficiency. In order to achieve this, the thermal analysis becomes very crucial in deciding on what types of insulators and other materials that would be used to make these machines. In industries, the knowledge of the thermal limits of machines if well utilized increases the life span of the machines and reduces downtime; thereby increasing production and profit. Specifically, this paper (i) predicted the temperature limits of the induction machine and its components, (ii) developed an accurate thermal model for an induction machine, (iii) predicted the temperature in different parts of the induction machine using the thermal model and software program and lastly (iv) investigated how the machine symmetry is affected by the nodal configuration.

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