Importance

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Abstract

The present invention relates to a cryogen-gas liquefaction system (1) and method comprising: a storage container (2) comprising a liquid storage portion (3) and a neck portion (4) with a liquefaction region (8) above said bath (7); a coldhead (9) arranged at the neck portion (4) comprising one or more refrigeration stages (10, 11); a gas intake module (12) containing an amount of gas-phase cryogen for its introduction into the storage container (2); and a pressure control mechanism (13) for controlling the cryogen gas pressure within the liquefaction region (8) of the storage container (2). Advantageously, the coldhead (9) further comprises: a refrigeration compressor (17) for distributing gas-phase cryogen inside the coldhead (9); one or more extraction orifices (22) communicating a gas circulation circuit inside the coldhead (9) with the external region of the refrigeration stages (10, 11), acting as pass-through ports (23); and a gas injection source (19) connected with the gas circulation circuit of said refrigeration compressor (17) through a gas injection valve (20), that maintains a total amount of gas constant in the compressor gas circuit, to compensate for the amount of gas extracted and liquefied through the extraction orifices (22).

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First Claim