MHD generating system. [open-cycle coal-fired two-phase liquid metal MHD generator]
Coal combustion gas is the primary working fluid and copper or a copper alloy is the electrodynamic fluid in the MHD generator, thereby eliminating the heat exchangers between the combustor and the liquid-metal MHD working fluids, allowing the use of a conventional coal-fired steam bottoming plant, and making the plant simpler, more efficient and cheaper. In operation, the gas and liquid are combined in a mixer and the resulting two-phase mixture enters the MHD generator. The MHD generator acts as a turbine and electric generator in one unit wherein the gas expands, drives the liquid across the magnetic field and thus generates electrical power. The gas and liquid are separated, and the available energy in the gas is recovered before the gas is exhausted to the atmosphere. Where the combustion gas contains sulfur, oxygen is bubbled through a side loop to remove sulfur therefrom as a concentrated stream of sulfur dioxide. The combustor is operated substoichiometrically to control the oxide level in the copper.
- Assignee:
- Dept. of Energy
- OSTI ID:
- 6262862
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL-FIRED MHD GENERATORS
DESIGN
LIQUID-METAL MHD GENERATORS
COMBINED-CYCLE POWER PLANTS
COMBUSTION PRODUCTS
COPPER
COPPER ALLOYS
DESULFURIZATION
LIQUID METALS
MIXERS
OPEN-CYCLE MHD GENERATORS
TWO-PHASE FLOW
WORKING FLUIDS
ALLOYS
CHEMICAL REACTIONS
DIRECT ENERGY CONVERTERS
ELEMENTS
FLUID FLOW
FLUIDS
LIQUIDS
METALS
MHD GENERATORS
POWER PLANTS
THERMAL POWER PLANTS
TRANSITION ELEMENTS
300101* - MHD Generators- Design & Development