Abstract: The disclosure relates to a lubrication and cooling device (1), comprising; a cooling fluid device (3), which comprises a first channel (5), which is connected to a first inlet port (7), and a lubricant fluid device (9), which comprises a second channel (11), which is connected to a second inlet port (13). The lubrication and cooling device (1) further comprises a heat exchanger (15), which comprises a cooling circuit (17) and a lubricant delivery circuit (19). The heat exchanger (15) is arranged to cool the lubricant fluid (24) by means of the cooling fluid (22), wherein the cooling fluid is a cryogenic fluid. The disclosure further relates to a method for lubricating and cooling a workpiece or a process by using a lubrication and cooling device (1), wherein the method comprises the steps of: a) cooling the lubricant fluid (24 by means of the cooling fluid (22) using the heat exchanger (15), and b) providing the cooled lubricant fluid (24) to the workpiece or process being lubricated and cooled.

Abstract: The invention relates to the use of an optical phase detection sensor arrangement (1) for detecting the phase of a cryogenic fluid (2) in a conduit of a cryogenic light fluid delivery system, said phase detection sensor arrangement comprising: an inlet port (3) for receiving cryogenic fluid; an outlet port (4) for releasing cryogenic fluid; a first connecting portion (5) for connection to a light source (6); a second connecting portion (7) for connection to a light sink (8); a housing (9); and a measurement chamber (10) provided in said housing between, and preferably in fluid communication with, said inlet port and said outlet port; wherein said first and second connecting portions are arranged in said housing so that said light source and said light sink, when connected to said first and second connecting portions, are arranged such that light can be emitted from said light source into said measurement chamber, and said emitted light can be received by said light sink.

Abstract: A method of treating an interior surface of a workpiece (5); said method comprising providing a workpiece (5) having an interior passage (11) defined at least partly by said interior surface to be treated, said passage (11) having an inlet section and an outlet section; providing in said interior passage (11) at least one deflecting object (6), said deflecting object (6) having an outer surface, whereby a space is formed between said outer surface of said at least one deflecting object (6) and said interior surface of said workpiece (5); providing an abrasive fluid (3) in said space, such that said space is substantially filled with said abrasive fluid (3); and effecting flow of said abrasive medium (3) through said interior passage (11) from said inlet portion to said outlet portion.