Design study of a 200 MW(e) alkali metal/steam binary power plant using a coal-fired fluidized bed furnace

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The results of a study of 200 MW(e) alkali metal/steam binary power plant using a coal-fired fluidized bed furnace are described. Both cesium and potassium were evaluated for the topping cycle working fluid and cesium was selected. The fuel used was Illinois No. 6 coal, and limestone was used as the bed sorbent material. For the reference design, the furnace operated at atmospheric pressure and the cycle conditions for the power conversion system were 1500/sup 0/F to 900/sup 0/F for the topping cycle and 2400 psi 1000/sup 0/F to 1/sup 1///sub 2/ in. Hg for the steam system. Several variations ... continued below

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Pages: 229

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Samuels, G.; Graves, R. L.; Lackey, M. E.; Tudor, J. J. & Zimmerman, G. P. April 1, 1978.

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The results of a study of 200 MW(e) alkali metal/steam binary power plant using a coal-fired fluidized bed furnace are described. Both cesium and potassium were evaluated for the topping cycle working fluid and cesium was selected. The fuel used was Illinois No. 6 coal, and limestone was used as the bed sorbent material. For the reference design, the furnace operated at atmospheric pressure and the cycle conditions for the power conversion system were 1500/sup 0/F to 900/sup 0/F for the topping cycle and 2400 psi 1000/sup 0/F to 1/sup 1///sub 2/ in. Hg for the steam system. Several variations of the plant were briefly evaluated. These variations included using a supercritical steam system and using a pressurized furnace. The principal conclusions of the study are as follows: a satisfactory design of an atmospheric pressure fluidized bed furnace binary power plant was evolved which uses a variation of the conventional binary cycle which permits utilizing the full potential of the alkali metal topping cycle; the net plant efficiency (coal to busbar) of the reference system was 44.6%; the net plant efficiency of a larger system with a 3500 psi 1000/sup 0/F steam system was 46.8%; an intermediate pressure turbocharged system with a furnace pressure of 4 atm (0.4 MPa) would have many advantages in comparison to the atmospheric pressure system, including a plant efficiency about one percentage point higher than the reference design, reduced limestone requirement and potential capital cost saving; and although cost estimates were not a part of the design study, a comparison of the design of this study to that of the Energy Conversion Alternative Study (ECAS) indicates plant costs 20 to 25% less than that of the final ECAS design.

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Pages: 229

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Dep. NTIS, PC A11/MF A01.

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  • Report No.: ORNL/TM-6041
  • Grant Number: W-7405-ENG-26
  • DOI: 10.2172/6812949 | External Link
  • Office of Scientific & Technical Information Report Number: 6812949
  • Archival Resource Key: ark:/67531/metadc1193082

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  • April 1, 1978

Added to The UNT Digital Library

  • July 2, 2018, 10:52 p.m.

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  • Aug. 30, 2018, 5:56 p.m.

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Samuels, G.; Graves, R. L.; Lackey, M. E.; Tudor, J. J. & Zimmerman, G. P. Design study of a 200 MW(e) alkali metal/steam binary power plant using a coal-fired fluidized bed furnace, report, April 1, 1978; United States. (https://digital.library.unt.edu/ark:/67531/metadc1193082/: accessed March 25, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.