Burckhardt Compression Ag

Besim Fejzuli

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).

Device and method for preparing liquified natural gas (LNG) fuel

Apparatus () for providing a supply of natural gas fuel comprising a compressor () having an inlet () for a stream of natural gas (), wherein the inlet () may be placed in fluid communication with an LNG storage tank () in order to provide a supply of boil-off gas () from out of the LNG storage tank (), and an outlet () which may be placed in fluid communication with a natural gas supply pipe (), characterised in that the compressor () comprises a first and subsequently a second compression stage (), wherein the first and the second compression stage () take the form of labyrinth-sealed piston-compressors () or piston-ring-sealed piston-compressors (), and wherein the first compression stage () features a larger piston diameter than the second compression stage (), and that the compressor () comprises at least a third subsequent compression stage (), which takes the form of a piston-ring-sealed piston-compressor () or a labyrinth-sealed piston-compressor ().

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Effretikon, Switzerland

Besim Fejzuli