MonteCarlo Techniques in Thermal Analysis – Design Margins Determination Using Reduced Models and Experimental Data

2006 ◽  
Author(s):  
Marco Molina ◽  
Amalia Ercoli Finzi
Keyword(s):  
Experimental Data ◽  
Thermal Analysis ◽  
Reduced Models ◽  
Analysis Design

Thermal Analysis of the Hot Dip-Coating Process

1993 ◽  
Vol 115 (2) ◽  
pp. 453-460 ◽  
Author(s):  
Hui Zhang ◽  
M. Karim Moallemi ◽  
Sunil Kumar
Keyword(s):  
Experimental Data ◽  
Thermal Analysis ◽  
Approximate Solution ◽  
Dip Coating ◽  
Solution Procedure ◽  
Heat Diffusion ◽  
Coating Process ◽  
Parametric Effects ◽  
Simplifying Assumptions ◽  
Axial Heat

In this study a thermal analysis is performed on the hot dip-coating process where solidification of metal occurs on a bar moving through a finite molten bath. A continuum model is considered that accounts for important transport mechanisms such as axial heat diffusion, buoyancy, and shear-induced melt motion in the bath. A numerical solution procedure is developed, and its predictions are compared with those of an analytical approximate solution, as well as available experimental data. The predictions of the numerical scheme are in good agreement with the experimental data. The results of the approximate solution, however, exhibit significant disagreement with the data, which is attributed to the simplifying assumptions used in its development. Parametric effects of the bath geometry, and initial and boundary temperatures and solid velocity, as characterized by the Reynolds number, Grashof number, and Stefan numbers, are presented.

scholarly journals Template Synthesis, Characterization and Biological Activity of Cu(II), Ni(II), Co(II), Zn(II)Complexes with Isonicotinoylhydrazone--2-aldehydefluorene Ligand

2010 ◽  
Vol 7 (1) ◽  
pp. 227-233
Keyword(s):  
Experimental Data ◽  
Escherichia Coli ◽  
Thermal Analysis ◽  
Biological Activity ◽  
Nmr Spectra ◽  
Magnetic Moments ◽  
Analytical Data ◽  
Azomethine Nitrogen ◽  
Tetrahedral Geometry ◽  
Metal Ligand

This is about synthesizing new complex combinations of Cu(II), Ni(II),Co(II), Zn(II) with aroylhydrazone ligand isonicotinoylhydrazone-2-aldehydefluorene (INHAF) made by condensation of isonicotinoylhydrazine with 2-aldehydefluorene. The complexes have been characterized by analytical data, IR, UV-Vis, NMR spectra, magnetic susceptibility values, thermal analysis and for the Cu(II) complex the ESR spectrum has been registered. For all complexes the biological activity against theStaphylo-coccus aureus, Escherichia coli, Klebssiella pneumoniaebacteria has been investigated. The experimental data sustain stoichiometry of 1:2 (metal/ligand) for the Cu(II), Ni(II), Zn(II) complexes and of 1:1 for the complex with Co(II). The electronic spectra and the magnetic moments suggest octahedral stereochemistry at the complexes with Cu(II), Ni(II) and the tetrahedral geometry for the Co(II) complex. The INHAF ligand is coordinated bidentate by the O=C amide oxygen and the azomethine nitrogen in the complexes of Cu(II), Ni(II), Co(II) and monodentate by the azomethine nitrogen in the complex of Zn(II).

Elimination of Acid Red 88 by Waste Product from the Phosphate Industry: Batch Design and Regeneration

2021 ◽  
Author(s):  
Khaled Boughzala ◽  
Mustapha Hidouri
Keyword(s):  
Electron Microscopy ◽  
Experimental Data ◽  
Thermal Analysis ◽  
Waste Product ◽  
Langmuir Model ◽  
X Ray Diffraction ◽  
Retention Capacity ◽  
Phosphate Industry ◽  
Pseudo Second Order ◽  
Scanning Electron

Waste regenerated after washing of rock phosphate and phosphogypsum has been proposed as removal agents of Acid Red 88 (AR 88)) from artificially contaminated solution. Natural phosphate (PN) was also studied for comparison. These materials were characterized beforehand, as is intended for the removal tests, by chemical analysis, powder X-ray diffraction, Fourier-transform infrared spectroscopy, thermogravimetric analysis– differential thermal analysis, scanning electron microscopy, and N2 adsorption isotherms. The conducted experiments show that among the different materials, the PWR has the highest retention capacity of the dye (123.4 mg g−1) of AR-88. Upon calcinations, the removal capacities reduced by 60 to 70%. We take note also that a decrease in the amount of removed AR 88 dye occurs with an increase in pH. The kinetics data on the reaction between AR 88 and the materials are described well by a pseudo -second-order model. The Langmuir model is successfully applied to the experimental data of the removal of acid red 88. The removal process is exothermic.

Performance Study of an Oil-Immersed Power Transformer With Shallow Geothermal Cooling

2015 ◽  
Vol 8 (2) ◽  
Author(s):  
Gerd Schmid ◽  
Chien-Yeh Hsu ◽  
Yu-Ting Chen ◽  
Tai-Her Yang ◽  
Sih-Li Chen
Keyword(s):  
Experimental Data ◽  
Thermal Analysis ◽  
Heat Exchanger ◽  
Water Flow ◽  
Cooling System ◽  
Flow Direction ◽  
Water Flow Rate ◽  
Transformer Oil ◽  
Performance Study ◽  
Cooling Performance

This paper investigates the cooling performance of a shallow geothermal energy method in relation to the cooling system of a 75 kVA oil-immersed transformer. A thermal analysis of the complete system is presented and then validated with experimental data. The cooling performance of the shallow geothermal cooling method is indicated by its cooling capacity and average oil temperature. The results of this study show that the average oil temperature can be reduced by nearly 30 °C with the aid of an 8 m deep U-pipe borehole heat exchanger, thereby making it possible to increase the capacity of the transformer. By increasing the water flow rate from 6 L/m to 15 L/m, the average oil temperature could be lowered by 3 °C. In addition, the effects of changing the circulating water flow direction and the activation time of the shallow geothermal cooling system were investigated. The results of the thermal analysis are consistent with the experimental data, with relative errors below 8%. The results of the study confirm that a larger temperature difference between the cooling water and the transformer oil at the inlet of the heat exchanger can increase the overall heat transfer rate and enhance the cooling performance of the shallow geothermal cooling system.

Two New Copper (II) Complexes with the Same NNO Donor Schiff Base Ligand: A Monomer and a Dimer

2012 ◽  
Vol 67 (3) ◽  
pp. 192-196
Author(s):  
Bao Lin Liu ◽  
Yan Xia Wang ◽  
Ruo Jie Tao
Keyword(s):  
Experimental Data ◽  
Thermal Analysis ◽  
Schiff Base ◽  
Magnetic Measurements ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Antiferromagnetic Exchange ◽  
X Ray ◽  
Distorted Octahedral ◽  
Best Fit

Two new copper(II) complexes, [(CuL)2(μ1,1-N3)2]・2H2O (1) and [Cu(HL)(2,2ʹ-bipy)- (CH3COO)]・ClO4・H2O (2), have been synthesized using the tridentate NNO Schiffbase ligand 2- [(2-aminoethylimino)methyl]-6-methoxyphenol (HL). They have been characterized by elemental analysis, IR spectroscopy, thermal analysis, and single-crystal X-ray analysis. The copper environment is distorted square pyramidal in complex 1: two nitrogen atoms and one oxygen atom from the ligands and two nitrogen atoms from two azido ligands build the coordination polyhedron around the copper atom. The Cu-Nazide-Cu angle in complex 1 is 85.6°. This is unusually small in comparison with the same angle in other end-on doubly azido-bridged dimers. Complex 2 is mononuclear with the Cu atom having a slightly distorted octahedral geometry. Magnetic measurements of 1 have been performed in the temperature range from 2 to 300 K. The experimental data indicate an antiferromagnetic exchange interaction between copper(II) ions bridged by the azido ligand. The best-fit parameters for complex 1 are g = 2.18 and J = −1.31 cm−1.

scholarly journals Practical application of thermal analysis in the development and study of polymer composites

2019 ◽  
pp. 25-27
Author(s):  
N. V. Antyufeeva, ◽  
A. V. Slavin ◽  
V. A. Bolshakov
Keyword(s):  
Experimental Data ◽  
Thermal Analysis ◽  
Quality Control ◽  
Composite Materials ◽  
Polymer Composites ◽  
Applied Research ◽  
Materials Science ◽  
Technological Properties ◽  
Practical Application ◽  
Manufacturing Enterprises

Modern multifunctional thermoanalytical complexes equipped with computers are inherently mobile laboratories. They are able to solve a wide variety of problems in materials science and technology, both in applied research and in the quality control of products supplied to manufacturing enterprises. Using the example of experimental data obtained in the study of the curing processes of thermosetting semi-finished products (prepregs) of polymer composite materials (PCM), the methodological possibilities of modern devices for thermal analysis are shown. They allow investigating and predicting changes in the technological properties of prepregs in a wide temperature range.

Thermal analysis, design, and implementation of an L‐band high‐power stepped impedance low‐pass filter

2020 ◽  
Vol 48 (12) ◽  
pp. 2078-2096
Author(s):  
Zohre Pourgholamhossein ◽  
Gholamreza Askari ◽  
Fattah Talaei ◽  
Hamid Mirmohammad Sadeghi
Keyword(s):  
Thermal Analysis ◽  
High Power ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Design And Implementation ◽  
Low Pass ◽  
Analysis Design ◽  
L Band
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