Compression device and method

A fluid compression device having a compression chamber accommodating a piston, the fluid compression device comprising:

• a first end accommodating a first end of the compression chamber;
• a second end accommodating a second end of the compression chamber, wherein the piston is configured to move in translation between the first and second ends of the compression chamber;
• a regeneration circuit connecting the first and second ends of the compression chamber and having a regenerator;
• a supply pipe comprising an upstream end intended to be connected to a source of fluid to be compressed and a downstream end opening into the first end of the compression chamber, the supply pipe comprising a set of one or more valves;
• at least one compressed-fluid discharge pipe comprising an upstream end connected to the compression chamber and a downstream end intended to be connected to a receiver of the compressed fluid;
• and
• a bypass pipe comprising an upstream end connected to the regeneration circuit and a downstream end connected to a recovery member, the bypass pipe being configured to draw a fluid fraction during a regeneration phase during which the piston is moved from the second end towards the first end of the compression chamber.