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Analysis of Fluid Flow in Redox Flow Batteries

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Analysis of Fluid Flow in Redox Flow Batteries ( analysis-fluid-flow-redox-flow-batteries )

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List of Figures Figure 1. 1. Usage share of solar and wind energy, and other renewable and non-renewable energy sources in the energy production in USA at years 2014 and 2019. This graph shows an increase in the share of renewable energy sources, especially wind and solar during this timeframe. (Data are captured from [1]) ........................................................................................................................... 2 Figure 1. 2. Average of the total implementation project cost of various energy storage systems in 2018. The projected cost for the same systems in 2025 is also illustrated. Currently, the cheapest energy storage technology is the Li-ion battery. (The data are obtained from [4]) ........................ 3 Figure 1. 3. A schematic of the fundamental operation of RFBs. Positive and negative electrolytes are pumped into the battery. Electrolytes passing through the electrodes trade electrons via an external circuit, alongside trading ions through the IEM. .............................................................. 5 Figure 1. 4. A schematic of a simple VRFB cell assembly. All parts are tightened to each other by bolts and nuts. ................................................................................................................................. 7 Figure 1. 5. A schematic of the flow field-electrode assembly. The electrode is compressed against the flow field and a fraction of the electrolyte, passing through the flow field channels, diffuses in the electrode. ................................................................................................................................... 8 Figure 1. 6. Schematic of channels in a. IFF b. PFF c. single-channel serpentine (SSFF) and d. multi-channels serpentine flow field (MSFF) designs. Letter e represents a schematic of Cartesian coordinates directions in the channels. ......................................................................................... 10 Figure 3. 1. The entrance region length for different vanadium electrolyte flow rates in single- channel serpentine (SSFF), 3-channels serpentine (3SFF), and interdigitated (IFF) flow fields with 25cm2 active area. ......................................................................................................................... 29 iv

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