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مرکز اطلاعات علمی SID1
اسکوپوس
دانشگاه غیر انتفاعی مهر اروند
ریسرچگیت
strs
Issue Info: 
  • Year: 

    2010
  • Volume: 

    0
  • Issue: 

    13
Measures: 
  • Views: 

    220
  • Downloads: 

    96
Abstract: 

PLEASE CLICK ON PDF TO VIEW THE ABSTRACT.

Yearly Impact:  

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Issue Info: 
  • Year: 

    2016
  • Volume: 

    7
  • Issue: 

    3
  • Pages: 

    329-341
Measures: 
  • Citations: 

    0
  • Views: 

    49297
  • Downloads: 

    38151
Abstract: 

To develop operating strategies in polymer electrolyte membrane (PEM) FUEL CELL-powered applications, precise computationally efficient models of the FUEL CELL stack voltage are required. Models are needed for all operating conditions, including transients. In this work, transient evolutions of voltage, in response to load changes, are modeled with a sum of three exponential decay functions.Amplitude factors are correlated to steady-state operating data (temperature, humidity, average current, resistance, and voltage). The obtained time constants reflect known processes of the membrane heat/water transport. These model parameters can form the basis for the prediction of voltage overshoot/undershoot used in computational-based control systems, used in real-time simulation. Furthermore, the results provide an empirical basis for the estimation of the magnitude of temporary voltage loss to be expected with sudden load changes, as well as a systematic method for the analysis of experimental data. Its applicability is currently limited to thin membranes with low to moderate humidity gases, and with adequately high reactant-gas stoichiometry.

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Issue Info: 
  • Year: 

    2019
  • Volume: 

    32
  • Issue: 

    4 (TRANSACTIONS A: Basics)
  • Pages: 

    489-494
Measures: 
  • Citations: 

    465
  • Views: 

    52598
  • Downloads: 

    16599
Abstract: 

Recent ly developed man-made st ructures have caused environmental pollut ions, and unfortunately, in spite of the deteriorat ing affairs and repeated warnings by scient ists and experts, the degree of contamination is increasing considerably. One of the natural sources undergoing changes is the coasts. It is mainly due to human act ivit ies which have led to a change in the quality and quant ity of sediments. These regions can be contaminated by a variety of hazardous pollutants such as heavy metals and hydrocarbons. In this work, a combination of electrokinetic and MFC process was used for Cr removal from contaminated sediments. According to the obtained results, a maximum power density and current of 1. 06 W/m3 and 52. 05 A/m3 were achieved during the process. Given the presence of chromium in the catholyte, it can be concluded that the chromium migration from sediment sample to the cathode chamber has been taken. In addit ion, the maximum Cr measured in catholyte was 0. 056 mg/l. Overall, the results confirmed the high efficiency of the proposed CELL for contaminant removal from sediments.

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گارگاه ها آموزشی
Author(s): 

TURKMEN A.C.

Issue Info: 
  • Year: 

    2017
  • Volume: 

    70
  • Issue: 

    -
  • Pages: 

    1066-1071
Measures: 
  • Citations: 

    476
  • Views: 

    23003
  • Downloads: 

    32195
Keywords: 
Abstract: 

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Issue Info: 
  • Year: 

    2007
  • Volume: 

    3
  • Issue: 

    1-2
  • Pages: 

    31-41
Measures: 
  • Citations: 

    0
  • Views: 

    90660
  • Downloads: 

    69950
Abstract: 

The operation of FUEL CELL Distributed Generation (FCDG) systems in distribution systems is introduced by modeling, controller design, and simulation study of a Solid Oxide FUEL CELL (SaFe) distributed generation (DG) system. The physical model of the FUEL CELL stack and dynamic models of power conditioning units are described. Then, suitable control architecture based on fuzzy logic control for the overall system is presented in order to active power control and power quality improvement. A MATLAB/Simulink simulation model is developed for the SOFC DG system by combining the individual component models and the controllers designed for the power conditioning units.Simulation results are given to show the overall system performance including active power control and voltage regulation capability of the distribution system. 

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Author(s): 

shahi A. | HAJILARY N. | REZAKAZEMI M.

Issue Info: 
  • Year: 

    2019
  • Volume: 

    9
  • Issue: 

    1
  • Pages: 

    217-235
Measures: 
  • Citations: 

    0
  • Views: 

    255
  • Downloads: 

    214
Abstract: 

A 3D model of computational fluid dynamics for an anode solid oxide FUEL CELL is presented. This model incorporates important transport phenomena in a FUEL CELL such as heat transfer, mass transfer, electrode kinetics, and potential field. The simulation results of the model were compared with the available laboratory data in the same conditions that shows good agreement with other references. In this model, the effect of different parameters such as temperature, pressure, stoichiometry and electrolyte thickness on the FUEL CELL performance was investigated. The results of this model clearly describe the distribution of species, including reactants and products, temperature distribution, distribution potential, and distribution of current density. The results showed that the temperature, pressure and stoichiometry of the anode have a great effect on the performance of the CELL so that each parameter increases the performance of the FUEL CELL performance. On the other hand, increasing the thickness of the electrolyte can have a negative effect on the performance of the FUEL CELL.

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strs
Author(s): 

HAJIZADEH A.

Issue Info: 
  • Year: 

    2011
  • Volume: 

    2
  • Issue: 

    2
  • Pages: 

    55-66
Measures: 
  • Citations: 

    0
  • Views: 

    1373
  • Downloads: 

    427
Abstract: 

This paper deals a control strategy developed for optimizing the power flow in a FUEL CELL Hybrid Vehicle (FCHV) structure. This method implements an on-line power management based on the neuro-fuzzy controller between dual power sources that consist of a battery bank and a FUEL CELL (FC). This structure included battery and FUEL CELL and its power train system include an Electric Motor (EM) and vehicle dynamics. The proposed control method involves an intelligent controller which captures all of possible operation modes and predicts the driver intention. Moreover, there are local controllers to regulate the set points of each subsystems to reach the best performance and acceptable operation indexes. Simulation results of hybrid system illustrate improvement in the operation efficiency of the FCHV and the battery state of charge and FUEL CELL utilization factor have been maintained at a reasonable level.

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Issue Info: 
  • Year: 

    2012
  • Volume: 

    2
  • Issue: 

    3
  • Pages: 

    12-19
Measures: 
  • Citations: 

    0
  • Views: 

    918
  • Downloads: 

    349
Abstract: 

Using the renewable energy is the better option to supply demined in the standalone area. World’s most fast-growing renewable energy resource is the wind energy. One of the main disadvantages of this system, however, is that naturally variable wind speed causes power fluctuation problems at the load side. Besides, long-term storage of power generated by wind turbines is considered as a limitation on the part of remote locations. Batteries can be used to store a limited amount of energy for a short time. Applied hybrid energy is a good idea for supply demand in the discrete wind speed region. The present study was aimed at analyzing the energy flow analysis of a hybrid wind turbine-FUEL CELL system. Such system consists of wind turbines, electrolyzer, FUEL CELL and hydrogen tank for long time energy storage. A case study is done using practical data from the Abarkoh region in Iran. The result revealed, the percentage of energy generated by the wind turbines and used to cover the electrical demand is 56% and the percentage of the demand covered by the FUEL CELL 44%.

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Issue Info: 
  • Year: 

    2011
  • Volume: 

    2
  • Issue: 

    3
  • Pages: 

    172-176
Measures: 
  • Citations: 

    0
  • Views: 

    101153
  • Downloads: 

    31518
Abstract: 

In this study, a research technique - Dynamic Electrochemical Impedance Spectroscopy for FUEL CELL research is presented. The direct methanol FUEL CELL was the object of the study. The changes of operational conditions such as temperature, oxidant flow intensity and load on the CELL global impedance were examined. The results of these changes on the performance of the CELL were observed.

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Issue Info: 
  • Year: 

    2014
  • Volume: 

    27
  • Issue: 

    1 (TRANSACTIONS A: BASICS)
  • Pages: 

    57-62
Measures: 
  • Citations: 

    0
  • Views: 

    68914
  • Downloads: 

    26523
Abstract: 

According to importance and security of energy in recent years, too many research about renweable energy have been done. Among renewable energy sources, FUEL CELL has far attention, because the efficiency of FUEL CELLs is always higher as compared with other distributed generation systems. FUEL CELL has a lot of advantages such as: high efficiency (35%-60%), low to zero emissions, quiet operation, high reliability due to the limited number of moving parts and the ability to be placed at any site in a distribution system without geographic limitations. Management in supplying residential load with FUEL CELL power plant (FCPP) connected to grid is the aim of this paper. Economical FUEL CELL model includes Operational cost, startup cost and different tariffs on electricity during the day hour is discussed. In the present research, reformer is used to produce hydrogen for FCPP. Genetic algorithm (GA) is used to determine optimal operation of FCPP with six-minute change in load pattern. The results are discussed in conclusion.

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