REFRIGERATION AND/OR LIQUEFACTION DEVICE AND CORRESPONDING METHOD

摘要

Refrigeration device comprising a working circuit in a loop for the working gas and comprising, in series: a compression station (1), a cold box (2), a system (14) for the exchange of heat between the cooled working gas and a user (10), a system for the additional pre-cooling of the working gas leaving the compression station (2) comprising an auxiliary cryogenic fluid volume (3), the cold box (2) comprising a first cooling stage for the working gas comprising a first (5) and a second (15) heat exchanger, these being connected both in series and in parallel to the working circuit at the outlet of the compression station (1), the first cooling stage also comprising a third heat exchanger (25) selectively exchanging heat with the auxiliary fluid, characterized in that the third heat exchanger (25) is connected both in series and in parallel to the first (5) and to the second (15) heat exchangers, the working circuit comprising a recuperation pipe (125) fitted with at least one valve (225) and which connects the outlet of the third heat exchanger (25) to the second heat exchanger (15).