Compressor station for arctic gas pipeline
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United States of America Patent
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-
Feb 8, 1983
Grant Date -
N/A
app pub date -
Jan 28, 1981
filing date -
Jan 28, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The cold decompressed gas flowing into the compression station is preheated by the compressed warmer gas discharged by the station's compressor, thereby raising the temperature of the compressed gas at the discharge outlet of the compressor. The warm compressed gas discharged by the compressor is cooled with ambient air and with the cold decompressed gas stream flowing into the station. If required, to still further reduce its temperature, the cold compressed gas stream is expanded until its temperature approaches the temperature of the gas within the pipeline. The apparatus of the invention includes a gas-to-gas heat exchanger wherein the decompressed cold gas is first preheated by the counterflowing warm compressed gas. The preheated gas is allowed into the inlet of the compressor. The temperature of the warm compressed gas from the discharge outlet of the compressor is first reduced by a gas-to-air heat exchanger. The temperature of the gas stream flowing out of the gas-to-air heat exchanger is further reduced by the gas-to-gas heat exchanger. Finally, if required, further temperature reduction is achieved within an expander.
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