Simulation of the Vanadium Redox Flow Battery System and Design of Charging / Discharging System via LabView

• Main Authors: Yue-Lin Jhong, 鍾岳霖
• Other Authors: Chih-Yang Dai
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/80389925491801517455

碩士 === 國立聯合大學 === 能源工程學系碩士班 === 102 === Facing the issue of fossil fuels depletion, renewable energies such as solar and wind power are rapidly growing. With increasing amount of renewable energy, adequate storage technology must be utilized to effectively improve the power quality of electric grid. Vanadium redox flow battery has many advantages over other energy storage systems due to low cost, high safety, low environmental impact, high cycle life, low land occupancy, and decoupling of power and storage capacity design to make it more suitable for the different electricity storage applications. Currently the battery electricity storage efficiency and energy density are low. Applicability of large-scale electricity storage is gradually improved. This study built a 1 kW, 10 kWh vanadium redox flow battery electricity storage system model in order to understand the influences of different cell designs, operating conditions on storage efficiency, and energy density. Results of this model could be used as the reference for characteristic prediction, to reduce experiment cost, to provide high efficiency conditions. Modeling results showed that high energy storage efficiency can be achieved at low charge/discharge current and small internal resistance. High electrolyte concentration and large electrolyte volume can enhance the system storage density. The required electric storage capacity was estimated by assumed that 6% of Taiwan electricity is supplied by wind power, characteristics of existed large-scale wind turbine, and weather at Hsinchu coastal. Besides the existing pump-hydro storage, Taiwan still need to build 11.2 GWh electricity storage systems. This system will take about 12.4 hectares if vanadium redox flow battery is used. This study also designed a LabView control and monitoring interface. We using a lead acid battery to demonstrated this control and monitoring system.