Improvement and scale-up of the NASA Redox Storage System
As larger cells and stacks are developed and tested, the NASA Redox Energy Storage System continues to show the technical performance required and cost-effectiveness for use with stand-alone photovoltaic and wind turbine installations and electric utility load-leveling. Over the past year, the anion exchange membranes and chromium electrodes have been further improved. Parametric flow studies show that pumping power requirements and shunt current losses in complete systems will be acceptable. More refined cost estimates confirm earlier predictions that system costs should be attractively low. A preprototype 1.0 kW Redox system (2 kW peak) with 11 kWh storage apacity has been built and integrated with the NASA/DOE photovoltaic test facility at NASA Lewis. This full function Redox system includes four substacks of 39 cells each (1/3 ft/sup 2/ active area) which are connected hydraulically in parallel and electrically in series. An open circuit voltage cell and a set of rebalance cells are used to continuously monitor the system state of charge and automatically maintain the anode and cathode reactants electrochemically in balance. Recent membrane and electrode advances are reviewed, and the results of multicell stack tests of 1 ft/sup 2/ hardware and the design of the 1 kW (2 kW peak) integrated system are briefly described.
- Research Organization:
- NASA Lewis Research Center, Cleveland, OH (United States)
- DOE Contract Number:
- AI04-80AL12726
- OSTI ID:
- 7040777
- Report Number(s):
- DOE/NASA/12726-6; NASA-TM-81632; CONF-800806-40
- Resource Relation:
- Conference: 15. intersociety energy conversion engineering conference, Seattle, WA, USA, 18 Aug 1980
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
25 ENERGY STORAGE
OFF-PEAK ENERGY STORAGE
REDOX FUEL CELLS
PHOTOVOLTAIC POWER SUPPLIES
DESIGN
PERFORMANCE
WIND TURBINES
CHROMIUM IONS
ELECTROCATALYSTS
ENERGY STORAGE SYSTEMS
IRON IONS
MEMBRANES
PERFORMANCE TESTING
POWER RANGE 1-10 KW
REDOX REACTIONS
CATALYSTS
CHARGED PARTICLES
CHEMICAL REACTIONS
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTRONIC EQUIPMENT
ENERGY STORAGE
EQUIPMENT
FUEL CELLS
IONS
MACHINERY
POWER SUPPLIES
REGENERATIVE FUEL CELLS
SOLAR EQUIPMENT
STORAGE
TESTING
TURBINES
TURBOMACHINERY
300501* - Fuel Cells- Design & Development
250800 - Energy Storage- Chemical