Characterization and performance analysis of multi-stack vanadium redox flow battery

Energy storage technology is a technology that manages power supply system to create energy and cost saving for utilities and consumers. Wind power, solar, and hydroelectric power are examples of renewable resources and are used as an alternative energy and energy storage for power supply. Redox Flo...

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Main Author:	Nurizzati, Md. Nizam
Format:	Thesis
Language:	English
Published:	2019
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://umpir.ump.edu.my/id/eprint/31093/1/Characterization%20and%20performance%20analysis%20of%20multi-stack%20vanadium%20redox%20flow%20battery.wm.pdf
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spelling	my-ump-ir.310932023-05-16T03:28:24Z Characterization and performance analysis of multi-stack vanadium redox flow battery 2019-08 Nurizzati, Md. Nizam TK Electrical engineering. Electronics Nuclear engineering Energy storage technology is a technology that manages power supply system to create energy and cost saving for utilities and consumers. Wind power, solar, and hydroelectric power are examples of renewable resources and are used as an alternative energy and energy storage for power supply. Redox Flow Battery (RFB) is an electrochemical system that could repeatedly convert and store energy in large scale. Vanadium Redox Flow Battery (VRFB) is one of the noteworthy energy storage due to the fact that it eliminates the cross contamination of electrolyte problem that occurs in other redox flow battery. Sharing the same principle of storing the energy externally as fuel cells, RFB has the advantage of being able to electrically reverse the electrochemical reaction within the cell. Much of the emphasis of recent research on vanadium redox flow battery (VRFB) has been focused under field testing, demonstration stage and the investigation of leakage problem caused by rubber seal, membrane, carbon felt and fitting in construction, but information on construction, experimental characterization, electrolyte preparation, and overall systems under study is still minimal. This project focuses on the characterization and performance analysis for linearity of a multi-stack VRFB for different cell stack sizes of 25 cm2, 56.25 cm2 and 100 cm2. The unit cell performance with respect to voltage efficiency under different performance parameters (current density, flow rates, volume of electrolytes, temperature of cell, electrode porosity and membrane conductivity) are presented along with the cell linearity findings while keeping the coulombic efficiency at its optimum value of 90%. The cell stack exhibits different characteristics under different operating parameters. The best cell design for this project is for the electrode size of 100 cm2 at current density of 50 mA/cm2, flow rate of 0.17 cm3/s, electrolyte volume of 10 cm3, cell temperature of 288.15 K, electrode porosity of 0.94 epsilon and membrane conductivity of 15 S/m. The relation between the size of electrodes in multi-stack VRFB is also analysed and discussed to develop theories for linearity in which it is found that there exists a linear relationship between different current density, flow rate, temperatures of cell and electrode porosity value with the same cell stack size but no linear relationship between different volume of electrolytes and membrane conductivity values with the same cell stack size. Ultimately, suggestion for system improvement is highlighted. 2019-08 Thesis http://umpir.ump.edu.my/id/eprint/31093/ http://umpir.ump.edu.my/id/eprint/31093/1/Characterization%20and%20performance%20analysis%20of%20multi-stack%20vanadium%20redox%20flow%20battery.wm.pdf pdf en public masters Universiti Malaysia Pahang Faculty of Electrical & Electronic Engineering Mohamed, Mohd Rusllim
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
advisor	Mohamed, Mohd Rusllim
topic	TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering Nurizzati, Md. Nizam Characterization and performance analysis of multi-stack vanadium redox flow battery
description	Energy storage technology is a technology that manages power supply system to create energy and cost saving for utilities and consumers. Wind power, solar, and hydroelectric power are examples of renewable resources and are used as an alternative energy and energy storage for power supply. Redox Flow Battery (RFB) is an electrochemical system that could repeatedly convert and store energy in large scale. Vanadium Redox Flow Battery (VRFB) is one of the noteworthy energy storage due to the fact that it eliminates the cross contamination of electrolyte problem that occurs in other redox flow battery. Sharing the same principle of storing the energy externally as fuel cells, RFB has the advantage of being able to electrically reverse the electrochemical reaction within the cell. Much of the emphasis of recent research on vanadium redox flow battery (VRFB) has been focused under field testing, demonstration stage and the investigation of leakage problem caused by rubber seal, membrane, carbon felt and fitting in construction, but information on construction, experimental characterization, electrolyte preparation, and overall systems under study is still minimal. This project focuses on the characterization and performance analysis for linearity of a multi-stack VRFB for different cell stack sizes of 25 cm2, 56.25 cm2 and 100 cm2. The unit cell performance with respect to voltage efficiency under different performance parameters (current density, flow rates, volume of electrolytes, temperature of cell, electrode porosity and membrane conductivity) are presented along with the cell linearity findings while keeping the coulombic efficiency at its optimum value of 90%. The cell stack exhibits different characteristics under different operating parameters. The best cell design for this project is for the electrode size of 100 cm2 at current density of 50 mA/cm2, flow rate of 0.17 cm3/s, electrolyte volume of 10 cm3, cell temperature of 288.15 K, electrode porosity of 0.94 epsilon and membrane conductivity of 15 S/m. The relation between the size of electrodes in multi-stack VRFB is also analysed and discussed to develop theories for linearity in which it is found that there exists a linear relationship between different current density, flow rate, temperatures of cell and electrode porosity value with the same cell stack size but no linear relationship between different volume of electrolytes and membrane conductivity values with the same cell stack size. Ultimately, suggestion for system improvement is highlighted.
format	Thesis
qualification_level	Master's degree
author	Nurizzati, Md. Nizam
author_facet	Nurizzati, Md. Nizam
author_sort	Nurizzati, Md. Nizam
title	Characterization and performance analysis of multi-stack vanadium redox flow battery
title_short	Characterization and performance analysis of multi-stack vanadium redox flow battery
title_full	Characterization and performance analysis of multi-stack vanadium redox flow battery
title_fullStr	Characterization and performance analysis of multi-stack vanadium redox flow battery
title_full_unstemmed	Characterization and performance analysis of multi-stack vanadium redox flow battery
title_sort	characterization and performance analysis of multi-stack vanadium redox flow battery
granting_institution	Universiti Malaysia Pahang
granting_department	Faculty of Electrical & Electronic Engineering
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/31093/1/Characterization%20and%20performance%20analysis%20of%20multi-stack%20vanadium%20redox%20flow%20battery.wm.pdf
_version_	1783732152865652736

Characterization and performance analysis of multi-stack vanadium redox flow battery

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