REFRIGERATION DEVICE, FOR EXAMPLE FOR A SYSTEM FOR PRODUCING LIQUEFIED GAS, COMPRISING AT LEAST ONE ROTATING MACHINE WITH A GAS SEAL

摘要

This refrigeration device has a refrigeration circuit comprising: - at least one compression stage (C1, C2, C3), - an expansion stage (16) and a heat exchanger (8), - a reservoir (22) of liquid refrigerant, - a point of injection (24) of coolant disposed downstream of (the) stage (s) compression (C1, C2, C3) and upstream of the heat exchanger (8), said point of injection (24) being fed from the refrigerant reservoir (22), at least one rotating machine with a gas seal being present in the compression and expansion stages. Application to a liquefied natural gas production system.