Device, facility and method for keeping a liquefied gas store cold

A device for keeping a liquefied gas store cold, comprising:

• a cryogenic refrigerator,
• a subcooling circuit comprising a set of pipes, the subcooling circuit comprising an aspiration end configured to be seated in a lower portion of a liquefied gas store and configured to aspirate the liquefied gas,
• a heat exchanger exchanging heat between the fluid aspirated by subcooling circuit and the refrigerator, the subcooling circuit comprising at least one injection end configured to inject the fluid cooled in the heat exchanger into the store,
• a boil-off gas recovery pipe having an upstream end configured to be connected to an upper portion of the store to recover the boil-off gas, the recovery pipe comprising a downstream end configured to be connected to a consumer of boil-off gas, and
• a bypass pipe and a set of valves configured to enable boil-off gas to be transferred from the recovery pipe to the subcooling circuit, the bypass pipe having a first end connected to the recovery pipe and a second end connected to the subcooling circuit,
• wherein the second end of the bypass pipe is connected to the subcooling circuit upstream of the heat exchanger.