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stores in this conceptual design. Two stores (see Figure 4) would be required in order to form the 6MWh battery system to be tested at the BEST Faci lity. The Mark 4 prototype module has already beenbuiltandtestedaspartofthejointEPRI- EDA program. The 45kWh module, assembled and testedinlate1977,isshowninFigure12. To date, the battery has delivered in excess of the design capacity but at a reduced efficiency.(6) Refurbishing of the module is presently underway to raise the delivered energy to 50kWh at an elec trochemical energy efficiency of 70%. Fig. 12 - 45kWh zinc-chlorine battery module The zinc-chlorine battery system to be tested at the BEST Facility in late 1980 will deliver 4.8MWh dc. The system will consist of two racks, each comprised of forty-four modules as in the Mark4lOOMWhbatteryplantdesign. Eachmodule will deliver 55kWh, approximately 3kWh less than theanticipatedenergydeliveredbyamodulein the first commercial zinc-chlorine battery plant. ACKNOWLEDGEMENTS The authors wish to thank Mr. P. Carr, Dr. Chen Chi, Mr. G. Henriksen, and Dr. S. Kodali, of EDA, Dr. J. Birk and Mr. W. Spindler of the Electric Power Research Institute, Mr. J. C. Smith and Mr. Kurt Klunder of the U.S. Department of Energy, and members of the EPRI utility panel for many useful discussions. The financial support provided for this work by Gulf + Western Indus tries and EPRI is also gratefully acknowledged. REFERENCES 1. P. C. Symons and C. J. Warde, "Zinc-Chlor ine Batteries for Load-Leveling". Proceedings of the Symposium on Load-Leveling, N. P. Yao and J. R. Selman, Editors, Volume 77-4, The Electrochemical Society, Princeton, N.J., 1977; pp. 334-352. 2. J. R. Birk and N. P. Yao, "Batteries for Utility Applications: Progress and Problems". Proceedings of the Symposium on Load-Leveling, Reference 1, pp. 229-238. 3. R. F. Battey, "Engineering Design and Cost Analysis of Chlorine Storage Concepts for a Zinc-ChlorineLoad-LevelingBattery". Prepared by Bechtel Corporation, San Francisco, Ca. EPRI EM-259, Final Report, 1976. 4. P. C. Symons, "Development of High- Efficiency Cost-Effective Zinc-Chlorine Batteries for Utility Peak-Shaving, 1976". Prepared by Energy Development Associates, Madison Heights, Michigan. EPRI EM-711, Interim Report, 1978: p. 5-2 of Part IV. 5. P. C. Symons and M. J. Hammond, "Evalua tion of a IkWh Zinc-Chloride Battery System". Prepared by Energy Development Associates, Madison Heights, Michigan. EPRI EM-249, Interim Report, 1976. 6. Interim Report on EPRI RP226-3 for 1977. In preparation. 7. W. J. Coughlin III and C. J. Warde, "Current Distribution in Zinc-Chlorine Batteries". To be presented at the Fall Meeting of the Elec trochemical Society, Pittsburgh, Pa., October, 1978.PDF Image | Development of the Zinc-Chlorine Battery for Utility
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