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Articles 1 - 11 of 11
Full-Text Articles in Engineering
Simulation Of Power Transformer Protection Using Microcontroller Relay, Innovative Research Publications Irp India, Arpit Rana, Jeet Shah, Anuradha Deshpande
Simulation Of Power Transformer Protection Using Microcontroller Relay, Innovative Research Publications Irp India, Arpit Rana, Jeet Shah, Anuradha Deshpande
Innovative Research Publications IRP India
Power transformers are key components for electrical energy transfer in a Power system. In order to protect the transformers from these faults different protective methods are adopted. Some of them are differential protection, over excitation Protection, etc. In this Paper Over Voltage protection is established for the protection of the transformer. Microcontroller is used for the Power Transformer Protection as a relay. It will sense the fault Due to over voltage of about +5% and send trip signal to the relay driver circuit and the power transformer will automatically get isolated from the system. The Simulation circuit is designed in …
An Experimental Investigation On A Single Tubular Sofc For Renewable Energy Based Cogeneration System
Faculty of Engineering University of Malaya
Having negative impacts on environment and the scarcity of resources of conventional fossil fuels, fuel cell technology draws more attention as an alternative for providing the electrical energy in parallel with thermal energy. In this study, a single tubular solid oxide fuel cell (SOFC) with an electrolyte of Yttria-Stabilized Zirconia 8 mol% ceramic powder was experimentally investigated. The investigation illustrated the effects of three different fuel flow-rates (175 ml/min, 250 ml/min and 325 ml/min) and two operating temperatures (650 degrees C and 750 degrees C) on the output electrical and thermal powers. The highest electrical voltage (open circuit) and overall …
Eulerian-Lagrangian Analysis Of Solid Particle Distribution In An Internally Heated And Cooled Air-Filled Cavity
Faculty of Engineering University of Malaya
A parametric study has been conducted to investigate particle deposition on solid surfaces during free convection flow in an internally heated and cooled square cavity filled with air. The cavity walls are insulated while several pairs of heaters and coolers (HACs) inside the cavity lead to free convection flow. The HACs are assumed to be isothermal heat source and sinks with temperatures T-h and T-c (T-h > T-c). The problem is numerically investigated using the Eulerian-Lagrangian method. Two-dimensional Navier-Stokes and energy equations are solved using finite volume discretization method. Applying the Lagrangian approach, 5000 particles, distributed randomly in the enclosure, were …
Simulation Of Phase Transformation Behavior Of Niti Doped With Cu During Loading Using Classical Molecular Dynamics, Ajit Behera
Simulation Of Phase Transformation Behavior Of Niti Doped With Cu During Loading Using Classical Molecular Dynamics, Ajit Behera
Ajit Behera
No abstract provided.
Comparing Qos Of Dsdv And Aodv Routing Protocols In Vehicular Network, Aref Hassanpour, Hooman Hoodeh, Amirhossein Zarrinnegar, Arsalan Emami, Rafidah Md Noor
Comparing Qos Of Dsdv And Aodv Routing Protocols In Vehicular Network, Aref Hassanpour, Hooman Hoodeh, Amirhossein Zarrinnegar, Arsalan Emami, Rafidah Md Noor
Hooman Hoodeh
With the advance of Vehicular ad-hoc network, routing protocol has become one of the most important issues in transmitting data among Vehicles. The two routing protocol are DSDV and AODV which DSDV is known as a novel approach in proactive system; however, AODV has good performance in reactive system. In this paper, we compare the efficiency between DSDV & AODV in terms of packet-loss, end-to-end delay and throughput based on given scenarios. The comparison has implemented in various speeds for acquiring result with higher performance. The speeds consist of 5, 20 and 40km/s. then we analyze the explicit results according …
Generating A Random Collection Of Discrete Joint Probability Distributions Subject To Partial Information, Luis V. Montiel, J. Eric Bickel
Generating A Random Collection Of Discrete Joint Probability Distributions Subject To Partial Information, Luis V. Montiel, J. Eric Bickel
Eric Bickel
In this paper, we develop a practical and flexible methodology for generating a random collection of discrete joint probability distributions, subject to a specified information set, which can be expressed as a set of linear constraints (e.g., marginal assessments, moments, or pairwise correlations). Our approach begins with the construction of a polytope using this set of linear constraints. This polytope defines the set of all joint distributions that match the given information; we refer to this set as the “truth set.”We then implement aMonte Carlo procedure, the Hit-and- Run algorithm, to sample points uniformly from the truth set. Each sampled …
Applicability Of Membrane Reactor For Wgs Coal Derived Gas Processing: Simulation-Based Analysis, Krzysztof J. Gosiewski, Marek Tanczyk
Applicability Of Membrane Reactor For Wgs Coal Derived Gas Processing: Simulation-Based Analysis, Krzysztof J. Gosiewski, Marek Tanczyk
Krzysztof Gosiewski
Gas from coal gasification contains less hydrogen than from other syngas production methods. An attractive option is its further hydrogen enrichment for pure hydrogen production in a membrane reactor (MR) by Water Gas Shift (WGS). The goal of present study was to analyse MR fed with coal derived gas. Simulations for feasible membrane permeation parameters revealed that to get high conversion above 90% a relatively high S/C should be applied. Moreover, hydrogen recovery is in this case low (below 30%) so for hydrogen production an additional H2 separation after the MR should have been applied. The paper also shows that …
Mathematical Simulation Of Wgs Membrane Reactor For Gas From Coal Gasification, Krzysztof J. Gosiewski, Krzysztof Warmuzinski, Marek Tanczyk
Mathematical Simulation Of Wgs Membrane Reactor For Gas From Coal Gasification, Krzysztof J. Gosiewski, Krzysztof Warmuzinski, Marek Tanczyk
Krzysztof Gosiewski
Mathematical model of a membrane reactor for the water-gas-shift (WGS) reaction and results of simulation studies are presented. The physicochemical phenomena and brief description of the model are given. Due to the fact that membranes for CO2 separation exhibit poor selectivity at the elevated temperature range (indispensable for the desired activity of WGS catalysts), the simulations were carried out only for H2 selective membranes, containing Pd or its alloys. Comparison of the conventional two-stage WGS reactor with the membrane reactor revealed that operating temperature range of the catalyst used in the membrane reactor unit has to be much wider than …
Modelling And Simulation Of Deep-Bed Grain Dryers, Johnner P. Sitompul, Istadi Istadi, I Nyoman Widiasa
Modelling And Simulation Of Deep-Bed Grain Dryers, Johnner P. Sitompul, Istadi Istadi, I Nyoman Widiasa
Istadi
This paper concerns with heterogeneous modeling of deepbed grain dryers based on two-phase model by taking into account coupled heat and mass transfer within grains. This model also consider axial mass and heat dispersion in the fluid phase. The dynamictwo-phase equations are solved numerically by finite difference with alternating direction implicit method algorithm, and then applied to simulate humidity and temperature profile of drying gas across dryers together with moisture content and temperature of grains. The capabilities of these models were compared with experimental data obtained from available literatures, under drying conditions such as temperature and absolute humidity of drying …
Simulation Of Inviscid Multi-Species Plasma Flow, Alexandre Martin, Marcelo Reggio, Jean-Yves Trépanier
Simulation Of Inviscid Multi-Species Plasma Flow, Alexandre Martin, Marcelo Reggio, Jean-Yves Trépanier
Alexandre Martin
A multi-species solver for plasma at thermodynamical equilibrium is developed. A numerical scheme, based on Roe's, is implemented with some modification regarding the average quantities. A perfect gas treatment is carried out for validations, and a quasi-real gas treatment is also presented. The latter takes into account the changes in the composition of the gas caused by fluctuations in temperature and density.
Inclusion Of Lubrication Forces In Dynamic Simulations, Ashok S. Sangani, Guobiao Mo
Inclusion Of Lubrication Forces In Dynamic Simulations, Ashok S. Sangani, Guobiao Mo
Ashok S. Sangani
A new method is described for incorporating close-field, lubrication forces between pairs of particles into the multiparticle Stokes flow calculations. The method is applied to the suspensions of both spherical as well as cyliridrical particles, and results computed by the method are shown to be in excellent agreement with the exact known results available in the literature.