Smart Moves Journal IJOSTHE (International Journal Online of Sports Technology & Human Engineering)
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128 research outputs found
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Study on System Topologies for Enhancing Potential of Fuel Cell System
No full textFuel cell is most promising power source for hybrid operation with conventional and non-conventional energy source. This is due to its operating temperature, power matching and remote application. The fuel cell based distributed generator (DG) source can be operated in combined with wind turbine, photovoltaic generation system, gas turbine and many more. The hybrid operation of fuel cell with conventional DG source may increase the reliability, power quality and system stability. This paper presents the review on hybrid operation of fuel cell with other conventional DG system in utility interconnected mode. In this, it is addressed that, the fuel cell and its hybrid operation with other power generation application are given. Also the various controlling techniques can be used for its optimum operation which are also mentione
Segmentation and Determination of Brain Tumor by Bounding Box Method
No full textAn Intracranial Neoplasm (Brain Tumor) occurs when abnormal cells form within the brain. There are two main types of tumors: Malignant (Cancerous Tumors) and Benign tumors. Cancerous or non-cancerous mass and growth of abnormal cells in the brain leads to the formation of brain tumor. In order to reduce the increasing fatality rate caused by brain tumor, it is necessary to detect and cure the affected region early and efficiently. Initially, pre-processing is performed, in this phase image is enhanced in the way that finer details are improved and noise is removed from the image. During pre-processing, filters are applied on an input grey scale image to remove unwanted impurities. Filtered image thus obtained is free from impurities. Processing of an image is performed next. Image segmentation is based on the division of the image into regions. Division is done on the basis of similar attributes. Post processing is done using threshold and watershed segmentation. During post processing, the filtered image is forwarded for threshold segmentation along with SVM classifier. Threshold segmentation usually transforms the image in a binary format based on a threshold value. SVM analyze data for classification and regression analysis. Watershed segmentation groups the pixels of image based on their intensities. Morphological operations are applied to the converted image. Boundary extraction is a major part of research which uses fast bounding box algorithm which detects the affected area in motion
A Review on The Cooling Technique of Solar PV System
No full textBeing the most widespread renewable energy generation system, photovoltaic (PV) systems face major problems, overheating and low overall conversion efficiency. The electrical efficiency of PV systems is adversely affected by significant increases in cell temperature upon exposure to solar irradiation. There have been several ways to remove excess heat and cool down the PV to maintain efficiency at fair levels. A hybrid photovoltaic/thermal system cooled by forced air circulation blown by a PV-powered fan can set up, and a rectangular control volume with cylindrical ends has been built at the back of the PV panel where aluminum fins have been placed in different arrangements and numbers
Study on Voltage Controlling Techniques In Grid Connected PV System
No full textThe energy is the very important parameter for survival or today’s growth we can transfer the energy from one form to other. The mainly wind and solar energies are the most available among other renewable energy sources in all over the world. In the present years, because of the rapid advances of power electronic systems the production of electricity from wind and photovoltaic energy sources have increased significantly. This paper proposed hybrid system is using of controlling power
A Review on The Thermal Analysis of Air Flow Gap
No full textMore than half of all electrical energy is consumed by motors and generators in an industrialized country. This energy is lost and converted to heat. This heat produced by the losses has adverse effect on the lifetime and performance of a machine. A machine has to be operated at a given temperature to achieve maximum efficiency, therefore heat transfer study of machines is of special interest to rotating machines manufacturers. In this paper we can investigate the heat transfer in the air-gap between the rotor and the stator of a simplified induction motor using Computational Fluid Dynamics. We can consider different air-gap widths and rotation speeds to explore the change in air-gap heat transfer when changing the air-gap width and the rotation speed
Survey on Power Intersegment Control Strategy of Multilevel Invertor for Grid System
No full textAmong the issues of accurate power distribution, stability improvement, and harmonic suppression in micro-grid, each has been well studied as an individual, and most of the strategies about these issues aim at one inverter-based micro-grid, hence there is a need to establish a model to achieve these functions as a whole, aiming at a multi-inverter-based micro-grid. This paper proposes a comprehensive strategy which achieves this goal successfully; since the output voltage and frequency of micro-grid all consist of fundamental and harmonic components, the strategy contains two parts accordingly. On one hand, a fundamental control strategy is proposed upon the conventional droop control. Finally, small signal analysis can be used to analyze the stability of the multi-converter parallel system after introducing the whole control strategy. 
Interpretation of MPPT Techniques in Grid Connected Solar PV Array System
No full textSolar energy is one of the most used and readily available renewable energy sources among the other energy sources. The power generated by PV systems is dependent on solar irradiance and temperature parameters. In the literature, many researchers and studies are interested in estimating true maximum efficiency point for the PV systems. Due to that fact, MPPT applications and techniques become an important issue for PV systems under both uniform and non uniform conditions. Although, PV system under uniform environment has only one maxima point on P-V curve which is simple to estimate correctly by conventional MPPT techniques, it is not as simple as under non-uniform condition such as partial shading and mismatch effects. To overcome the drawbacks of the conventional MPPTs under non uniform condition, researchers has been investigated new soft computing MPPTs, PV array configurations, system architectures and topologies
Solar Photo Voltaic System Power Enhancement Control Strategies for Inverter- A Survey
No full textPhotovoltaic (PV) energy has a fast growing annual rate and is quickly becoming an important part of the energy balance in most regions and power systems. This paper aims to study the effects of connecting a PV system to the grid through simulation of the system. The Effect of variation of power factor of loads, variation of PV penetration, introduction of harmonics into the system by the PV inverter and anti-islanding effect of the PV system are studied. Finally, the Performance Ratio of a typical grid connected PV system is evaluated to determine the reliability and grid connectivity of the PV system
Review on the enhancement and performance of continues helical baffles tie double pipe heat exchanger
No full textThis paper provides a review of the major work done on helical baf?es to improve the performance of shell and tube heat exchangers. Some of the major factors affecting the performance of shell and tube heat exchanger are discussed. The CFD modeling and experimental are showed from different studies that an increase in turbulence intensity could be one of the reasons for higher performance augmentation methods with the plain tubes heat exchanger. Heat transfer performance and flow resistance of the shell side of the double-pipe heat exchanger with helical baffle can be done investigated by using CFD numerical simulation software
PLATE FIN AND TUBE HEAT EXCHANGER
No full textThe main objective of the present work is to investigation of optimum design of plate fin tube heat exchanger using Computational fluid dynamic approach and maximizing thermal performance. There are total five designs of plate fin and tube heat exchanger are used in present work and CFD analysis have been performed in it to get maximum heat transfer. It has been observed from CFD analysis that the maximum heat transfer can be achieved from plate fin and tube heat exchanger with elliptical tube arrangement inclined at 30o with 23.22% more heat transfer capacity as compared to circular tube plate pin heat exchanger. So that it is recommended that if the plate fins and tube heat exchanger with inclined elliptical tube used in place of circular tube arrangement, batter heat transfer can be achieved