Device and method for preparing liquified natural gas (LNG) fuel
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United States of America Patent
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Mar 1, 2016
Grant Date -
Dec 18, 2014
app pub date -
Sep 2, 2014
filing date -
Mar 10, 2008
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Abstract
A method for creating a supply of natural gas fuel for a combustion engine, comprising: obtaining boil-off gas from an LNG storage tank containing liquified natural gas, compressing the boil-off gas in a compression stage consisting of a labyrinth-sealed piston-compressor or a piston-compressor sealed by piston rings, and compressing the natural gas in a compression stage consisting of a piston-compressor sealed by piston rings or a labyrinth-sealed piston-compressor, compressing the natural gas to a pressure of between 100 Bar and 500 Bar, and making the natural gas available at an outlet, wherein at least one of the piston-compressors has a bypass, and that natural gas is returned via the at least one bypass such that the natural gas at the outlet is at a required target pressure (Psoll).
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