Effect of Void on Temperature Distribution in XLPE Power Cables by COMSOL Multiphysics Simulation

2021 ◽  
Author(s):  
Ashfaque Ahmed Bhatti ◽  
Xiaosheng Peng ◽  
Bin Yang ◽  
Cheng Xie
Keyword(s):  
Temperature Distribution ◽  
Comsol Multiphysics ◽  
Power Cables ◽  
Multiphysics Simulation

scholarly journals Thermal Analysis of the Medium Voltage Cable

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4164
Author(s):  
Tomasz Szczegielniak ◽  
Dariusz Kusiak ◽  
Paweł Jabłoński
Keyword(s):  
Temperature Distribution ◽  
Analytical Method ◽  
Good Accuracy ◽  
Proximity Effects ◽  
Electrical Performance ◽  
Power Cables ◽  
Power Losses ◽  
Transmission Networks ◽  
Medium Voltage ◽  
Cable Lines

The use of high voltage power cables in distribution and transmission networks is still increasing. As a result, the research on the electrical performance of cable lines is still up to date. In the paper, an analytical method of determining the power losses and the temperature distribution in the medium voltage cable was proposed. The main feature of the method is direct including the skin and proximity effects. Then the Joule law is used to express the power losses in the conductor and screen, and the Fourier-Kirchhoff equation is applied to find out the temperature distribution in the cable. The research was focused on a cable with isolated screen and return current in the screen taken into account. The proposed method was tested by using the commercial COMSOL software(5.6/COMSOL AB, Stockholm, Sweden) as well as by carrying out laboratory measurements. Furthermore, the results obtained via the proposed method were compared with those given in literature. The differences between the temperature values calculated by the analytical method, numerical computations and obtained experimentally do not exceed 10%. The proposed analytical method is suitable in prediction the temperature of the power cables with good accuracy.

A Method for Harvesting Energy Using Piezoelectric Transducers

2015 ◽  
Vol 727-728 ◽  
pp. 607-611 ◽  
Author(s):  
Kshitij Chopra ◽  
Kritika Nigam ◽  
Sujata Pandey
Keyword(s):  
Zinc Oxide ◽  
Simulation Software ◽  
Piezoelectric Transducers ◽  
Comsol Multiphysics ◽  
Ambient Vibrations ◽  
Multiphysics Simulation

This paper analyses the behaviour ofpiezoelectric transducer for harvesting energy. The transducer was designedusing different materials for harnessing energy that include Zinc Oxide, LeadZirconate Titanate (PZT-2) and Quartz. The transducer was simulated using thesematerials and the voltage generated from ambient vibrations was analysed. MEMsmodule of COMSOL Multiphysics Simulation software was used to perform thesimulations. Behaviour of different materials towards various frequencies madeknown in this study gives an opportunity to estimate the fabricated device and alsosheds light on prospective applications it fits.

scholarly journals Computer Application for Simulation of Temperature Distribution Inside the Room

2018 ◽  
Vol 210 ◽  
pp. 04036
Author(s):  
Hana Charvátová ◽  
Martin Zálešák
Keyword(s):  
Spatial Distribution ◽  
User Interface ◽  
Temperature Distribution ◽  
Heat Input ◽  
Computer Application ◽  
Comsol Multiphysics ◽  
Heat Sources ◽  
Cyclic Heating ◽  
Heating And Cooling ◽  
Computer Testing

The paper deals with computer testing of the temperature distribution in buildings by using COMSOL Multiphysics software. It is devoted to a description of a computer application created in the Application Builder user interface for simulation of the temperature distribution in a room heated by two heat sources. The application allows you to change geometric dimensions of all elements of the studied model and their spatial distribution, as well as a choice of physical properties needed to access the distribution of temperature in the room depending on the ambient temperature and the heat input of the considered sources. Main functions of the application are presented by simulation of cyclic heating and cooling of the tested room.

scholarly journals Analysis of the Temperature Distribution in a Refrigerated Truck Body Depending on the Box Loading Patterns

Foods ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2560
Author(s):  
Junhwi So ◽  
Sungyong Joe ◽  
Seonho Hwang ◽  
Soojin Jun ◽  
Seunghyun Lee
Keyword(s):  
Temperature Distribution ◽  
Temperature Sensor ◽  
Turbulence Models ◽  
The Body ◽  
Cold Chain ◽  
Cfd Modeling ◽  
Comsol Multiphysics ◽  
Measured Temperature ◽  
Loading Patterns ◽  
Higher Temperature

The main purpose of cold chain is to keep the temperature of products constant during transportation. The internal temperature of refrigerated truck body is mainly measured with a temperature sensor installed at the hottest point on the body. Hence, the measured temperature cannot represent the overall temperature values of transported products in the body. Moreover, the airflow pattern in the refrigerated body can vary depending on the arrangement of loaded logistics, resulting temperature differences between the transported products. In this study, the airflow and temperature change in the refrigerated body depending on the loading patterns of box were analyzed using experimental and numerical analysis methods. Ten different box loading patterns were applied to the body of 0.5 ton refrigerated truck. The temperatures inside boxes were measured depending on the loading patterns. CFD modeling with two different turbulence models (k-ε and SST k-ω) was developed using COMSOL Multiphysics for predicting the temperatures inside boxes loaded with different patterns, and the predicted data were compared to the experimental data. The k-ε turbulence model showed a higher temperature error than the SST k-ω model; however, the highest temperature point inside the boxes was almost accurately predicted. The developed model derived an approximate temperature distribution in the boxes loaded in the refrigerated body.

scholarly journals Comparison of Strain Effect between Aluminum and Palladium Gated MOS Quantum Dot Systems

Universe ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 51
Author(s):  
Brian Chi Ho Mooy ◽  
Kuan Yen Tan ◽  
Nai Shyan Lai
Keyword(s):  
Quantum Dot ◽  
Metal Oxide ◽  
Gate Oxide ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Comsol Multiphysics ◽  
Strain Effect ◽  
Quantum Devices ◽  
Multiphysics Simulation ◽  
Simulation Results

As nano-scale metal-oxide-semiconductor devices are cooled to temperatures below 1 K, detrimental effects due to unintentional dots become apparent. The reproducibility of the location of these unintentional dots suggests that there are other mechanisms in play, such as mechanical strains in the semiconductor introduced by metallic gates. Here, we investigate the formation of strain-induced dots on aluminum and palladium gated metal oxide semiconductor (MOS) quantum devices using COMSOL Multiphysics. Simulation results show that the strain effect on the electrochemical potential of the system can be minimized by replacing aluminum with palladium as the gate material and increasing the thickness of the gate oxide.

scholarly journals Evaluation of laser beam interaction with carbon based material - glassy carbon

2015 ◽  
Vol 21 (1-1) ◽  
pp. 63-69 ◽  
Author(s):  
Milovan Janicijevic ◽  
Milesa Sreckovic ◽  
Branka Kaludjerovic ◽  
Mirko Dinulovic ◽  
Zoran Karastojkovic ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Temperature Distribution ◽  
Laser Beam ◽  
Energy Range ◽  
Glassy Carbon ◽  
Near Infrared ◽  
Comsol Multiphysics ◽  
Surface Damages ◽  
Beam Interaction ◽  
Carbon Based

Laser beam interaction with carbon based material (glassy carbon) is analyzed in this paper. Nd3+:YAG laser beam (1.06?m i.e. near infrared, NIR range) in ms regime with various energy densities is used. In all experiments, provided in applied working regimes, the surface damages have occurred. The results of laser damages are analyzed by light and electron scanning (SEM) microscopies. Program Image J is executed for quantitative analysis of generated damages based on micrographs obtained by light and SEM microscopes. Temperature distribution in exposed samples is evaluated by numerical simulations based on program packages COMSOL Multiphysics 3.5 in limited energy range.

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