290699 ĎA Step by Step Design Methodology for a Base Case Redox-Flow Battery'

Monday, October 29, 2012
Hall B (Convention Center )
Abdullah Alzubairi, Chemical and Biomolecular Engineering, University of Tennessee, Knoxville and Robert Counce, Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN

The ever growing demand for energy, and the strain put on the electrical grid because of this, has exposed the vulnerabilities of our decades old power distribution system.  Simply adding to the generation and distribution capacity is expensive, and funds for such projects are nearly nonexistent.  A possible solution to this can be found in the use of flow batteries for energy storage.  The scalability of flow batteries allows for grid stabilization, storage of solar or wind power, grid operational support, and load shifting.  Flow batteries have only recently moved from the laboratory to industry, however, and the information needed to design and cost of flow batteries is difficult to find.  Adding to this difficulty, the handful of companies building flow batteries today consider this information proprietary.  The work presented here demonstrates a procedure used to generate design for a general redox-flow battery with base case calculations for a specific redox-flow design as an example.  In this approach a procedure is used where the major components of aredox-flow battery are added to the flow sheet at discrete decision levels.  The design methodology is based on the work of Douglasand provides a profitability analysis at each decision level so that more profitable alternatives and directions can be identified before additional time and effort is expended on an impractical design.  Ultimately, this paper along with an associated Excelspreadsheet aid in forming base case flow sheet for redox-flow batteries and the capital cost estimate are generated.

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