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International Journal of Energetica最新文献

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CFD simulation of natural convection and heat transfer in a flat solar thermal collector with fins on the glazing - horizontal case 平板太阳能集热器自然对流和传热的CFD模拟
International Journal of Energetica Pub Date : 2019-01-02 DOI: 10.47238/IJECA.V3I2.80
Adel Laaraba
{"title":"CFD simulation of natural convection and heat transfer in a flat solar thermal collector with fins on the glazing - horizontal case","authors":"Adel Laaraba","doi":"10.47238/IJECA.V3I2.80","DOIUrl":"https://doi.org/10.47238/IJECA.V3I2.80","url":null,"abstract":"This study is based on a CFD simulation of a flat horizontal solar thermal collector containing fins on its inner face of the glazing. The walls of the solar collector with insulation are considered adiabatic and the rest of the walls are at constant different temperatures. The principal objective of this work is to study the effects of the number of fins that changed from 0 to 30, as well as their length varied from 0 to 0.8 on the air flow and heat transfer characteristics. It has been observed that the heat transfer rate is strongly affected by the number of fins and the length of the fins. The obtained result showed that the increase of the fins reduces the heat loss by convection by 54 %.","PeriodicalId":102946,"journal":{"name":"International Journal of Energetica","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116316863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimal Planning of On-Grid Hybrid Microgrid for Remote Island Using HOMER Software, Kish in Iran 基于HOMER软件的偏远海岛混合微电网优化规划，伊朗基什
International Journal of Energetica Pub Date : 2019-01-02 DOI: 10.47238/IJECA.V3I2.77
M. Jahangiri
{"title":"Optimal Planning of On-Grid Hybrid Microgrid for Remote Island Using HOMER Software, Kish in Iran","authors":"M. Jahangiri","doi":"10.47238/IJECA.V3I2.77","DOIUrl":"https://doi.org/10.47238/IJECA.V3I2.77","url":null,"abstract":"HOMER software functions as a tool for modeling and optimization of an energy generation micropower system based on renewable technologies. In this paper for the first time the monthly real load data have been used in HOMER to design a renewable-based microgrid in grid-connected mode for Kish Island, Iran. The calculations were performed in a way that the designed system could supply the load demand of the studied area with the lowest cost, least pollution, and highest reliability. To overcome the intermittency of renewable energy sources such as wind and solar, a combination of these sources in a hybrid system and installation of battery storage systems were considered. The solar radiation and wind speed data required by the software were obtained from the country’s meteorology and NASA website and used in the software. The analysis results of four scenarios, including national grid/diesel generator, national grid/diesel generator/solar cell, national grid/diesel generator/wind turbine, and national grid/diesel generator/solar cell/wind turbine, showed the prices per kWh of $0.483, $0.505, $0.472, $0.537, respectively. In these scenarios, the share of renewable energies was 0%, 8%, 11%, and 26%, respectively. The highest amount of electricity sold to the national grid was 1597095 kWh/y for the fourth scenario which had also the lowest rate of CO2 emissions by 4128650 kg/y.","PeriodicalId":102946,"journal":{"name":"International Journal of Energetica","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120911351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
Comparative Study between Sliding Mode Control and the Vectorial Control of a Brushless doubly fed induction generator 无刷双馈感应发电机滑模控制与矢量控制的比较研究
International Journal of Energetica Pub Date : 2019-01-02 DOI: 10.47238/IJECA.V3I2.74
O. Moussa
{"title":"Comparative Study between Sliding Mode Control and the Vectorial Control of a Brushless doubly fed induction generator","authors":"O. Moussa","doi":"10.47238/IJECA.V3I2.74","DOIUrl":"https://doi.org/10.47238/IJECA.V3I2.74","url":null,"abstract":"Brushless doubly fed induction generators (BDFIG) show commercial promise forwind-power generation due to their lower capital and operational costs and higher reliability ascompared with doubly fed induction generators. This paper proposes a robust sliding mode control of grid-connected brushless doubly fed induction generator (BDFIG). The developed algorithm is based on the decoupling control by using oriented grid flux vector control strategy. The decoupling of the active and the reactive stator powers insures an optimal performance of the BDFIG at the sub-synchronous region. The stator of this machine incorporates two sets of three phase windings with different number of poles, power winding (PW) and control winding (CW). The proposed method is tested with the Matlab/Simulink software. Simulation results illustrate the performances and the feasibility of the designed control.","PeriodicalId":102946,"journal":{"name":"International Journal of Energetica","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116456227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Modeling and Comparative Study of Speed Sensor and Sensor-less based on TSR-MPPT Method for PMSG-WT Applications PMSG-WT应用中基于TSR-MPPT方法的速度传感器与无传感器建模与比较研究
International Journal of Energetica Pub Date : 2019-01-02 DOI: 10.47238/ijeca.v3i2.69
Youcef Saidi, A. Mezouar, Y. Miloud, Mohammed Amine Benmahdjoub, M. Yahiaoui
{"title":"Modeling and Comparative Study of Speed Sensor and Sensor-less based on TSR-MPPT Method for PMSG-WT Applications","authors":"Youcef Saidi, A. Mezouar, Y. Miloud, Mohammed Amine Benmahdjoub, M. Yahiaoui","doi":"10.47238/ijeca.v3i2.69","DOIUrl":"https://doi.org/10.47238/ijeca.v3i2.69","url":null,"abstract":"The aim of this paper is to present a comparative study between two maximum power point tracking (MPPT) control based on tip speed ratio (TSR) method: maximum power control with wind speed measurement (TSR-MPCWSM) and the maximum power control with wind speed estimation (TSR-MPCWSE). These methods are analytically compared to illustrate TSR-MPPT and power smoothing capability delivered by the turbine. The dynamic performance, robustness, and fast approximation of the optimal value are proved with the simulations under MATLAB/Simulink software","PeriodicalId":102946,"journal":{"name":"International Journal of Energetica","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131359162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Effect of the Preheating Inlet Air on the G222 Fuel Combustion 进气预热对G222燃油燃烧的影响
International Journal of Energetica Pub Date : 2019-01-02 DOI: 10.47238/ijeca.v3i2.75
M. Attia
{"title":"Effect of the Preheating Inlet Air on the G222 Fuel Combustion","authors":"M. Attia","doi":"10.47238/ijeca.v3i2.75","DOIUrl":"https://doi.org/10.47238/ijeca.v3i2.75","url":null,"abstract":"In this paper, a numerical simulation is developed to study the preheating effect of the air in a three-dimensional cylindrical combustion chamber using the FLUENT-CFD code. Particularly, we are interested on the calculation of the characteristic parameters such as the axial velocity, the temperature and the mass fraction of carbon monoxide. This study consists of a special treatment of mathematical models. The considered approaches resolve the governing equations of system. The main objective of this work is to study the behavior of the parameters considered previously during the variation of the air inlet temperature. The obtained results show that the variation of the inlet temperature presents a direct effect on the considered parameters. ","PeriodicalId":102946,"journal":{"name":"International Journal of Energetica","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123622181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The relationship between the compressive strength and ultrasonic pulse velocity concrete with fibers exposed to high temperatures 高温下纤维混凝土抗压强度与超声脉冲速度的关系
International Journal of Energetica Pub Date : 2018-06-30 DOI: 10.47238/IJECA.V3I1.63
Belaribi Hassiba, M. Mekki, Rahmani Fraid
{"title":"The relationship between the compressive strength and ultrasonic pulse velocity concrete with fibers exposed to high temperatures","authors":"Belaribi Hassiba, M. Mekki, Rahmani Fraid","doi":"10.47238/IJECA.V3I1.63","DOIUrl":"https://doi.org/10.47238/IJECA.V3I1.63","url":null,"abstract":"The paper analyses the effects of high temperatures on the concrete residual strength using ultrasonic velocity (UPV). An experimental investigation was conducted to study the relationship between UPV residual data and compressive strength of concrete with different mixture proportions, cubic specimens with water-cement ratio of 0.35. They were heated in an electric furnace at temperatures ranging from 200°C to 600°C. In this experiment a comparison was made between the four groups which include two types of fibers steel 0,19%, 0,25% and 0,5%, polypropylene: 0,05%, 0,11% 0,16 % by volume. Cube specimens were tested in order to determine ultrasonic velocity. The compressive strength was tested too. According to the results, relations were established between ultrasonic velocity in the specimens and the compressive strength at different temperature and the range of the velocity of the waves were also determined for this kind of concrete. Result of the test showed that UPV test can be successfully used in order to verify the consistency of structures damaged by fire.","PeriodicalId":102946,"journal":{"name":"International Journal of Energetica","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115239635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
GPVDM simulation of layer thickness effect on power conversion efficiency of CH3NH3PbI3 based planar heterojunction solar cell 层厚对CH3NH3PbI3基平面异质结太阳能电池功率转换效率影响的GPVDM模拟
International Journal of Energetica Pub Date : 2018-06-30 DOI: 10.47238/IJECA.V3I1.64
A. Hima
{"title":"GPVDM simulation of layer thickness effect on power conversion efficiency of CH3NH3PbI3 based planar heterojunction solar cell","authors":"A. Hima","doi":"10.47238/IJECA.V3I1.64","DOIUrl":"https://doi.org/10.47238/IJECA.V3I1.64","url":null,"abstract":"Perovskite-based solar cell technologies have been a very attractive area of research in recent years. Organic-inorganic perovskite materials are in an increased evolution in power conversion efficiency. Inorganic materials have been tested at the laboratory level but their power conversion efficiency is still limited. In this paper, we used the GPVDM software to study the effect of some parameters on power conversion efficiency in a planar heterojunction solar cell based on CH3NH3PbI3 as an absorbing layer. The modifications were made by considering layers of perovskite without defects. The results show that the efficiency of the power conversion can be improved by adjusting layer thickness; in our case power conversion efficiency was increased from 9.96 % to 12.9 %.","PeriodicalId":102946,"journal":{"name":"International Journal of Energetica","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127020049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 36
Modeling Electric Field and Potential Distribution of an Model of Insulator in Two Dimensions by the Finite Element Method 用有限元法对绝缘子模型的电场和电势分布进行二维建模
International Journal of Energetica Pub Date : 2018-06-30 DOI: 10.47238/IJECA.V3I1.58
Nassima M ziou, Hani Benguesmia, Hilal Rahali
{"title":"Modeling Electric Field and Potential Distribution of an Model of Insulator in Two Dimensions by the Finite Element Method","authors":"Nassima M ziou, Hani Benguesmia, Hilal Rahali","doi":"10.47238/IJECA.V3I1.58","DOIUrl":"https://doi.org/10.47238/IJECA.V3I1.58","url":null,"abstract":"The electrical effects can be written by two magnitudes the field and the electrostatic potential, for the determination of the distribution of the field and the electric potential along the leakage distance of the polluted insulator, the comsol multiphysics software based on the finite element method will be used. The objective of this paper is the modeling electric field and potential distribution in Two Dimensions by the Finite Element Method on a model of insulator simulating the 1512L outdoor insulator used by the Algerian company of electricity and gas (SONELGAZ). This model is under different conductivity, applied voltage, position of clean layer and width of clean layer. The computer simulations are carried out by using the COMSOL multiphysics software. This paper describes how Comsol Multiphysics have been used for modeling of the insulator using electrostatic 2D simulations in the AC/DC module. Numerical results showed a good agreement.","PeriodicalId":102946,"journal":{"name":"International Journal of Energetica","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125027870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Economic Evaluation Analysis of Nano-silica Ultrafiltration Membrane Production from Sand 砂制纳米二氧化硅超滤膜的经济性评价分析
International Journal of Energetica Pub Date : 2018-06-30 DOI: 10.47238/IJECA.V3I1.59
K. Kurnia
{"title":"Economic Evaluation Analysis of Nano-silica Ultrafiltration Membrane Production from Sand","authors":"K. Kurnia","doi":"10.47238/IJECA.V3I1.59","DOIUrl":"https://doi.org/10.47238/IJECA.V3I1.59","url":null,"abstract":"The purpose of this research was to analyze the production method of a membrane of silica nanoparticles from an economic perspective. Silica nanoparticles are synthesized using a coprecipitation method. Briefly, the process consists of immersion, heating, precipitation, washing and drying, and packaging. The parameters used for economic analysis are gross profit margin (GPM), internal rate return (IRR), payback period (PBP), cumulative net present value (CNPV), break-even point (BEP), and profitability index (PI). The production of this ultrafiltration nano-silica membrane can be done by varying the amount of initial sand from 6 to 14 kg. The production of ultrafiltration nano-silica membranes can be produced in both domestic and micro-scale industries. To get a very good profit, economic analysis shows the minimum amount of sand used should be more than six kg. This study is very important because the production of ultrafiltration nano-silica membranes have a high potential in the field of economics and will encourage further investigation for the possibility of industrial production of these ultrafiltration nano silica membranes.","PeriodicalId":102946,"journal":{"name":"International Journal of Energetica","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125071634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Proposed Algorithm MPPT for Photovoltaic System 光伏系统MPPT算法研究
International Journal of Energetica Pub Date : 2018-06-30 DOI: 10.47238/IJECA.V3I1.60
M. Bechouat
{"title":"Proposed Algorithm MPPT for Photovoltaic System","authors":"M. Bechouat","doi":"10.47238/IJECA.V3I1.60","DOIUrl":"https://doi.org/10.47238/IJECA.V3I1.60","url":null,"abstract":"A proposed algorithm MPPT (Maximum Power Point Tracking) is proposed in this paper. When the insolation change rapidly, the P&O (Perturb and Observe) algorithm is used to adjust the operating point of the PV (Photovoltaic) array close to the MPP (Maximum Power Point) for fast tracking; also, the INC (Incremental Conductance) algorithm and the fuzzy controller skip drawbacks of the P&O algorithm by decreasing oscillations around the MPP and the underestimated. In addition, to improve the control precision, the effectiveness of proposed algorithm is validated by simulation using Matlab/Simulink, the simulation results show that the proposed algorithm tracks the MPP quickly, reduces the oscillation around the MPP effectively and improves the energy conversion efficiency of the PV panel.","PeriodicalId":102946,"journal":{"name":"International Journal of Energetica","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125593992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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