Search
1466 articles for “Protective”
-
Solution of Different Problems Related to Active Power Filter Design Using Python
Abstract: ABSTRACTThere are a variety of problems that lead to problems of rising losses and degradation in power quality in AC due to harmonic distortions, voltage sag, voltage spike, flicker, voltage swell, voltage fluctuations, noise and voltage imbalance. In this paper, different problems are analysed and based on their circuit type, input and output value of voltage and current VSI circuit is designed to increase performance in the system. In AC …
Published in Journal of Microelectronics and Solid State Devices · Vol. 9, Issue 3, 2022 · pp. 1–8 Read article
-
Password Based Circuit Breaker using Arduino
Abstract: Nowadays, we see that there are many electrical accidents occurring to the linemen. These accidents occur when the line mans work on the repairs or damages on the electrical lines. The main reason for these accidents are due to lack of communication or miscommunication between the linemen and the substation during the repairs. A circuit breaker is basically an electric switch that operates automatically and is designed to protect the …
Published in Journal of Microelectronics and Solid State Devices · Vol. 9, Issue 3, 2022 · pp. 9–20 Read article
-
Nuclear Safety and Regulation: A Review
Abstract: AbstractNuclear safety is defined by the International Atomic Energy Agency as “The achievement of proper operating conditions, resulting in protection of workers and environment from hazardous radiations”. The nuclear industry has continuously improved its safety standards and several regulatory boards monitor the nuclear setups to maintain the safety. However, many instances the safety lapse has resulted in disasters. The IAEA works in conjunction with member states and partners worldwide to …
Published in Journal of Nuclear Engineering & Technology · Vol. 7, Issue 2, 2017 · pp. 29–31 Read article
-
Compatibility Issues of Heat Pipes for Radioactive Exposures
Abstract: AbstractSelection of alloys are refractory materials those withstand high temperature, radioactive embrittlement effects for long periods. Effects of high temperature and neutron embrittlement are subjects considered in this article. Effects of coolants, reactive gases like oxygen are facts of importance to select materials for reactor construction system. Selections of radioactive protecting alloys like sleeves are of importance to produce systems within margins of weight. Compatibilities have been decisive among material, …
Published in Journal of Nuclear Engineering & Technology · Vol. 9, Issue 3, 2019 · pp. 24–32 Read article
-
Worker Radiation Exposure during Transportation of Irradiated LEU Targets in a Typical MTR Reactor
Abstract: The paper estimates the radiation dose exposure for the worker in the second Egyptian research reactor ETRR-2 during the process of transporting the irradiated low enriched uranium LEU plates from the core to the hot cell. The aim of estimating the radiation doses distribution is determining the exposure dose for the worker during the transportation process as a safety point of view. In order to estimate irradiated LEU plates radiation …
Published in Journal of Nuclear Engineering & Technology · Vol. 10, Issue 3, 2020 · pp. 48–51 Read article
-
Using Nuclear Grade Resin for Ion exchange
Abstract: In EDF, especially in the nuclear business, ion exchange resins are regularly employed for water purification. High-quality nuclear grade resins must be used in primary and secondary circuits as well as effluent treatment to retain dissolved species, some of which may be radioactive. To decrease worker dose during maintenance and to reduce radioactive resin waste volumes, purification needs to become more and more effective. The right resin qualities must be …
Published in Journal of Nuclear Engineering & Technology · Vol. 11, Issue 3, 2021 · pp. 33–37 Read article
-
Enhancement of anticorrosion performance on aluminium substrate by novel nanocomposites of PANI/Bi2O3.CO.ZnO/CNT
Abstract: PANI/Bi2O3.CO.ZnO nanocomposites were prepared in presence of bismuth cobalt oxide nanoparticles at 25oC using ammonium persulphate as an oxidant in an in situ polymerisation with aqueous solution of camphor sulphonic acid (SDBS). These nanocomposites were characterized by XRD, FTIR, TEM, UV and SEM. The performance of PANI, PANI/Bi2O3.CO.ZnO nanocomposites and PANI/Bi2O3.CO.ZnO/CNT nanocomposites as anticorrosion protective coating on Al in 0.5 M HNO3 was studied by using potentiodynamic polymerisation technique and …
Published in Journal of Polymer & Composites · Vol. 6, Issue 2, 2018 · pp. 31–41 Read article
-
Application of Industrial Waste in Metal Matrix Composite
Abstract: AbstractKeeping the goals of protecting the environment and exploring low-cost options for the development of metal matrix composites (MMCs) using cheap reinforcing materials which obtained from recycling techniques of agro and industrial waste products become one of the new interest fields of the researchers. The industrial wastes reinforce materials in useful way not only save the manufacturing cost of products but also reduce the environmental pollution. This paper represents a …
Published in Journal of Polymer & Composites · Vol. 4, Issue 3, 2016 · pp. 27–34 Read article
-
Comprehensive account on role of catechin based polyphenols in nanocomposite formulations
Abstract: Antioxidants play a crucial role in wellness, health maintenance and the prevention of chronic and degenerative disease, in neuroprotection activities and protection against oxidative cellular damage by U.V. radiation. Polyphenols are secondary metabolites of plants usually involved in defense against ultraviolet radiation or aggression by pathogens. Antioxidant properties, free radical-scavenging abilities and antimicrobial properties of these polyphenols make them useful in the field of biomedical applications, used as food additives, …
Published in Journal of Polymer & Composites · Vol. 8, Issue 1, 2020 · pp. 26–31 Read article
-
Improving Photocatalytic and Antibacterial Properties of Zein/Polyvinyl Alcohol Polymer Composite Film by Dispersing TiO2 Nano Particles
Abstract: Zein/polyvinyl alcohol/nano-TiO2 composite film was effectively blended using a solution casting method. Mechanical, photocatalytic, and antibacterial properties of the composite film were evaluated. The breaking elongation of the composite film increased up to the maximum loading of 0.4% of nano-TiO2. The humidity and moisture content relationship was estimated with standard modified models of Halsey, Oswin, Chung Pfost, and Henderson. It was found that the Halsey model was the most suitable …
Published in Journal of Polymer & Composites · Vol. 8, Issue 2, 2020 · pp. 110–127 Read article
-
Development of Refractory Synthesized from Waste Ceramic Fiber and Chamotte
Abstract: Research on refractory materials is always essential in thermal engineering to ensure both heat savings and environmental protection. Raw materials used initially have a great influence on the production process and product properties. In addition, the refractory products are tested under conditions of high temperature and varying intensity, such as tests of thermal shock resistance. In this study, new refractory composites were prepared by mixing waste ceramic fibers with chamotte …
Published in Journal of Polymer & Composites · Vol. 8, Issue 2, 2020 · pp. 101–109 Read article
-
Novel Porous Refractory Synthesized from Diatomaceous Earth and Rice Husk Ash
Abstract: Refractory materials are products used in thermal equipment to protect the fire and prevent heat loss to the outside environment. Thermal equipment such as driers, ceramic kilns, glass or metal furnaces and others always consume high heat in the combustion of the fuel. If the thermal equipments have high heat loss which cause wastes of fuel and increases production costs. Therefore, researchers are always looking for a solution to minimize …
Published in Journal of Polymer & Composites · Vol. 8, Issue 2, 2020 · pp. 128–137 Read article
-
Enhancement in Surface Properties of Magnesium Alloy after Electroless Ternary Alloy Nano Composite Coating
Abstract: AZ91 Magnesium alloys have exceptional rigidity, low density, and electromagnetic protection properties, making them ideal for usage in numerous industrial components. But Magnesium alloys specially AZ91 have a significant disadvantage in terms of corrosion and hardness, which restricts their practical uses. One of the most recent ways for improving the corrosion and hardness of Mg alloys is electro-less nano-coating. This study investigates the hardness and corrosion properties of AZ91 Magnesium …
Published in Journal of Polymer & Composites · Vol. 10, Issue 2, 2022 · pp. 8–13 Read article
-
A Brief Review on Single Phase PV Micro-Inverter System
Abstract: This paper presents a review on recent developments and a summary of inverter technology for single phase grid-connected photovoltaic (PV) systems for power levels up to 5 kW. The functions of inverter include DC–AC conversion, output power quality assurance, various protection mechanisms, and system controls. PV inverters are classified in three categories which are centralized inverter, string inverter and module oriented or micro inverter. Centralized inverter, string inverter and module …
Published in Journal of Power Electronics and Power Systems · Vol. 5, Issue 2, 2015 · pp. 55–62 Read article
-
Evaluation Algorithm for Discrimination between Fault and Power Swing Using Independent Component Analysis
Abstract: The analysis of faults and disturbances in power systems is a basic requirement for a secure and reliable electrical power supply. Independent component analysis (ICA) is an efficient computational method used to find out hidden components in a set of sampled data. The basic target of ICA is to find a linear representation and relation between nongaussian data captured during disturbance, so that the components are statistically independent, or as …
Published in Journal of Power Electronics and Power Systems · Vol. 6, Issue 3, 2016 · pp. 53–59 Read article
-
Design and Simulation of Z-Source Inverter Fed Brushless DC Motor Drive Supplied With Fuel Cell for Automotive Applications
Abstract: This paper presents design and simulation of Z-source inverter fed brushless DC motor drive supplied with fuel cell for automotive applications. The brushless DC (BLDC) motor are used due to many advantages such as high efficiency, high torque, high reliability, high-power density, lower maintenance compared to other motors in electric transport applications. The BLDC motor drive is with voltage source inverter (VSI) or current source inverter (CSI) because of low …
Published in Journal of Power Electronics and Power Systems · Vol. 6, Issue 3, 2016 · pp. 60–71 Read article
-
Simulation and Analysis of Sub Synchronous Resonance in a Series Compensated Transmission System
Abstract: Series compensation of a transmission line is necessary as it increases the power transfer capability of a transmission line. Employing series compensation also leads to phenomenon of sub synchronous resonance (ssr) wherein the electrical and mechanical natural frequencies match and exchange energy leading to excitation of natural torsional modes of the turbine generator unit. This leads to mechanical fatigue of the shaft on which turbine and generator are connected. This …
Published in Journal of Power Electronics and Power Systems · Vol. 5, Issue 3, 2015 · pp. 87–96 Read article
-
Impact of Time Multiplier Setting Range on Optimum Coordination of Directional Overcurrent Relays
Abstract: Over-current relays especially Inverse Definite Minimum Time (IDMT) relays are most commonly used protective device in the distribution system. It is vital that during abnormalities or faults, the IDMT relays must be capable to isolate only the faulty part of power system from the healthy system. The operating time of IDMT relays can be reduced with proper coordination between primary and backup relays by selecting optimum settings. Heuristic-based optimization techniques …
Published in Journal of Power Electronics and Power Systems · Vol. 4, Issue 3, 2014 · pp. 33–40 Read article
-
Improvement of Voltage Profile and Loss Reduction using Optimized Soft Computing Based Capacitor Placement Methodology
Abstract: Significant exploration has been done on the arrangement of ideal capacitor arranging in the appropriation frameworks for the assignments of power factor adjustment, voltage profile improvement and misfortune decrease. Particularly, mechanical plant with variable load conditions has huge inductive loads and its power factor is exceptionally poor. These ventures advantage most capacitor banks. This bank gives improved power factor, expanded voltage level on the load and lessen the electric service …
Published in Journal of Power Electronics and Power Systems · Vol. 10, Issue 2, 2020 · pp. 11–21 Read article
-
The Role of SCADA in Detecting Electric Faults in the Wind Turbine System: A Review
Abstract: A wind turbine is a machine which utilizes the kinetic energy of air to convert it into rotational energy. To generate the electricity, this rotational energy is transferred to the generator shaft. Whenever a fault occurs in the wind energy system, it decreases the system efficiency. During such abnormal conditions in a wind turbine system, the faults are detected through manual and/or automated system namely, SCADA. The control functions of …
Published in Journal of Power Electronics and Power Systems · Vol. 13, Issue 1, 2023 · pp. 16–24 Read article