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The paper addresses the design and implementation of the logic control functions of a multi-recipe batch process. A hierarchical control structure is adopted, with one supervisor module co-ordinating many “slave” controllers. Suitable rules are given based on supervisory control theory for the synthesis of the supervisor, described with Petri nets. As for the slave controllers, it is shown that Grafcet/SFC...
With charging current increase, we will face battery stop charging issue easily with ID constrain. In order to solve potential thermal issues of battery charger station in early stage. Early and easy thermal assessment, which can now be completed in the stages before detailed routing, helps to alleviate potential problems by CFD. It is allowed us to understand the system temperature distribution which...
We present a therapeutic application of a microfabricated implantable and resorbable medical device made out of fully degradable materials by demonstrating in vivo elimination of bacterial infection by wireless activation of the device after implantation. The device disappears upon its completion, requiring no retrieval.
Thermal processes play an essential role in the production and processing of countless industrial and consumer products. Narrow bandwidth near infrared (NIR) light allows contactless transfer of energy with a high power per area that can be tailored to the needs of the application. With arrays of VCSELs (Vertical-Cavity Surface Emitting Laser diodes), NIR emitters can be realized that provide heat...
Industrial heating furnaces have many special characteristics like huge capacity, long lag, non-linear attribute etc. Due to these properties, it is very essential to design an appropriate controller for these furnace systems so that proper operation as well as safety of the workers around it is ensured. This implies that, the stability analysis and controller design for these heating furnace systems...
The recent advances in thin-film thermoelectric (TE) materials have created opportunities for on-chip cooling and energy-harvesting with heat-fluxes >100W/cm2. However, it remains unclear how effective these materials are in the context of realistic microprocessor floorplan and workloads. Moreover, these TE materials suffer from contact parasitics that can significantly impact their performance...
Self consistent first principle calculations on superconducting material WN in cubic phase (NaCl-type) have been performed to understand their fundamental characteristics of the structural, electronic and thermal properties. The bulk modulus (BO), Debye temperature (6D), density of states (N (EF)), electronic specific heat coefficient (γ) and electron-phonon coupling constant (λ) have been computed...
With the advancement in the field of renewable energy sources, solar energy harvesting played an important role for the electrification. But major challenge was the efficiency of the solar photovoltaic (PV) system as with the increase in internal temperature of the PV cells the solar panel efficiency decreases. In the recent past, several methods had been experimented. The present paper deals with...
The goal of this paper is to introduce an experimental monitoring system for thermoelectric generator modules. This system consists in using thermoelectric generator devices for producing electrical power. Also it monitors some parameters of a thermoelectric generator such as the temperature of its cold side, the temperature of its hot side, the output voltage, the output current. The system is able...
The paper presents experimental results about Vapour Phase Soldering on flexible printed circuit boards, where the standard Surface Mounted Technology process was used for investigation. Test boards were prepared from FR4 type Printed Circuit Boards and single-sided flexible polyimide substrates. Lead-free SAC305 paste and different chip size surface mounted resistors were used for the test assembly...
With the pace of urbanization continues to accelerate, making underground construction area is growing. More and more large underground public buildings are located in the ground, such as shopping malls, subways and so on. The fire evacuation in a large underground building has more difficulty than on the ground. In order to gain more time for evacuation, smoke design of large underground public buildings...
This paper mainly does a research on force and thermal phenomena of short circuited melted mark in electrical fire. The primary short circuited melted mark and secondary short circuited melted mark were prepared by the experiment, and were characterized by metallographic microscope, powder X-ray diffraction, scanning electron microscope and energy dispersive spectroscopy, the role of forces and heat...
A thermo chromic materials named Salicylaldehyde ethanolamine Schiff base was synthesized with ethanolamine and salicylaldehayde derivative in the medium of ethanol, and was characterized by means of UV-Vis absorption, GCMS. The reaction kinetics of Schiff base production was investigated through UV-Vis absorption spectra, and also the thermochromism of Schiff Base Condensed from ethanolamine and...
Firstly, the theoretical model of polystyrene external thermal insulation material fires under conditions of window fire was put forward, the equations that calculate the important characteristic parameters of these fires such as the spread height, spread rate and ignition time were derived, and the relevant analyses were preliminarily made. Secondly, on the basis of theoretical analyses, the medium...
Selected examples of application of Mössbauer spectroscopy, nuclear resonance scattering of synchrotron radiation, and neutron scattering to battery and related materials research are presented. The charms of Mössbauer spectroscopy as a technique for screening materials, for detailed structure investigations, and for in situ measurements are illustrated. New developments of nuclear resonance scattering...
This work falls within the framework of CHAMS I project funded by IRESEN (Research Institute for Solar Energy and New Energy). Its principal objective is to develop a low cost solar field based on a new generation of Fresnel collectors. To attempt this goal, we have developed a code package for scientific computing in order to help in design of the desired solar field. This numerical tool is able...
A novel prospective way of continuous surface heating of steel work-pieces by a laser beam is modelled. The process is supplemented with pre-heating and post-heating of the heated parts by a classic inductor in order to avoid unacceptably high temperature gradients and subsequent mechanical stresses in the processed material. Its continuous mathematical model is solved numerically in 3D in the hard-coupled...
An alternative way of determining the temperature-dependent characteristics of metals is presented. The method that is relatively simple and cheap is suitable mainly for metals with lower melting points. The paper starts with the experimental investigation of the melting process of the Field metal in an induction furnace, which provides all necessary information for determining the above material...
This paper presents a comparison of the thermal properties between infiltrated and non-infiltrated copper windings. The focus is on thermal conductivity in the radial direction on the winding. The samples have a fill factor above 65 % due to the manufacturing method of the samples. Samples are produced and measured with the transient plane source technique and then compared to FEM simulations and...
Accurate sets of material constants and temperature coefficients are required to develop high temperature SAW sensors. It was previously shown that SAW Fractional Frequency Curve measurements combined with numerical optimization could help ease the burden of the experimental determination of some of these coefficients. To determine the other “missing” coefficients, it was suggested to use complementary...
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