초록 ▼

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 conventiona

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 coalfired 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.

대표청구항 ▼

An open-cycle coal-fired MHD generating system comprising an MHD generator, means for combusting coal, a mixer for mixing molten copper or copper alloy with coal combustion gases to form a two-phase fluid, means for feeding said twophase fluid as working fluid to the MHD generator, means for separat

An open-cycle coal-fired MHD generating system comprising an MHD generator, means for combusting coal, a mixer for mixing molten copper or copper alloy with coal combustion gases to form a two-phase fluid, means for feeding said twophase fluid as working fluid to the MHD generator, means for separating molten copper or copper alloy from the gas stream after leaving the MHD generator, means for returning the molten copper or copper alloy to the mixer, and means for obtaining additional energy from the gas stream prior to exhausting said stream to the atmosphere.