Refrigeration from expansion of transmission pipeline gas

Details Refrigeration from expansion of transmission pipeline gas Refrigeration from expansion of transmission pipeline gas

F - Mech Eng,Light,Heat,Weapons

25

J

162/115, 137/66

F25J 3/00 (2006.01)

Patent

CA 1247976

REFRIGERATION FROM EXPANSION OF TRANSMISSION PIPELINE GAS ABSTRACT Refrigeration is produced while delivering trans- mission pipeline gas of elevated pressure to a branch pipe- line of lower pressure by expanding the gas in a turbo- expander to a pressure below the branch pipeline pressure and recovering refrigeration from the expanded gas which is then compressed by a centrigual compressor directly driven by the turbo-expander to the pressure required for delivery into the branch pipeline. The gas is dehydrated by adding methanol and separating aqueous methanol condensate from the expanded gas, and the condensate is distilled with compression heat to recover methanol for reuse.

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