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

Technical Report · Sat Apr 01 04:00:00 EST 1978

DOI:https://doi.org/10.2172/6812949· OSTI ID:6812949

Samuels, G.; Graves, R. L.; Lackey, M. E.; Tudor, J. J.; Zimmerman, G. P.

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.

• Research Organization: Oak Ridge National Lab., Tenn. (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6812949
• Report Number(s): ORNL/TM-6041
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200102* -- Fossil-Fueled Power Plants-- Power Cycles
ALKALI METALS
BOILERS
BURNERS
CARBONACEOUS MATERIALS
CESIUM
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
COST
DESIGN
EFFICIENCY
ELECTRIC GENERATORS
ELEMENTS
ENERGY SOURCES
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FLUIDS
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
METALS
OPERATION
OXIDATION
PHYSICAL PROPERTIES
POTASSIUM
POWER PLANTS
STEAM
SUPERHEATERS
THERMAL POWER PLANTS
THERMODYNAMIC PROPERTIES
TOPPING CYCLES
TURBOGENERATORS
WORKING FLUIDS