| 摘要 |
1,118,041. MHD power plant. CONCH INTERNATIONAL METHANE Ltd. 22 June, 1965 [7 July, 1964], No. 28009/64. Heading H2A. A thermal power plant includes a magnetohydrodynamio generator whose exhaust gases supply heat to a second thermal power plant, wherein the magnet coils of the generator are cooled, directly or through a secondary fluid, by liquefied natural gas which forms the fuel supply to the generator combustion chamber. The natural gas may also be used as fuel for the boiler of the second thermal power plant. A cryogenic secondary fluid may be used and the magnet coil may be cooled to superconductive temperatures. In the systems described, air is initially freeze dried and cooled by the liquified natural gas before passing to a separator from where the separated oxygen passes through a heat exchanger in the separator to the combustion chamber of the generator. The separated nitrogen is compressed and cooled by the natural gas and liquefied, the liquid being passed through the coils of the generator and the vapour produced returned to the separator to complete the closed cycle. The liquid natural gas is vaporized in the heat exchangers and passed as the fuel supply to the generator combustion chamber. In a modification the nitrogen vapour from the liquefier is used in a pro-cooler for air which has both been freeze dried and had the carbon dioxide removed, and the oxygen from the separator passes through a separate heat exchanger to cool the incoming air to the separator. In both embodiments the oxygen from the separator is used to freeze dry the incoming air as described in Specification 1,118,042. Reference has been directed by the Comptroller to Specification, 974,951. |
