MHD generating system
According to the present invention, 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. 3 figs.
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- Patent Number(s):
- US 4200815; A
- Application Number:
- PPN: US 5-943827
- OSTI ID:
- 7008638
- Resource Relation:
- Patent File Date: 19 Sep 1978
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
COAL-FIRED MHD GENERATORS
DESIGN
OPERATION
AIR POLLUTION CONTROL
COMBUSTION PRODUCTS
COPPER ALLOYS
ENERGY RECOVERY
MHD POWER PLANTS
SULFUR
WORKING FLUIDS
ALLOYS
CONTROL
DIRECT ENERGY CONVERTERS
ELEMENTS
FLUIDS
MHD GENERATORS
NONMETALS
POLLUTION CONTROL
POWER PLANTS
300101* - MHD Generators- Design & Development
014000 - Coal
Lignite
& Peat- Combustion
200102 - Fossil-Fueled Power Plants- Power Cycles