Abstract: An air separation unit separates air into an oxygen-rich and oxygen-deficient gas. Fuel gas and the oxygen-rich gas are preheated at heat exchangers through which hot flue gas flows. Combustion of the preheated fuel and oxygen-rich gases result in the hot flue gas. The hot flue gas is cooled at the heat exchangers and flows through a waste heat boiler. Water and/or steam flowing through the waste heat boiler absorbs energy from the cooled flue gas thereby producing heated steam. The heated steam flows through a turbine to produce power. The power is transferred to the air separation unit, thus reducing a power requirement of the air separation unit needed to separate the air.

Abstract: The installation comprises at least one pair of adjacent spaces, one (1) for full cylinders, and the other (2) for empty cylinders, each accessible through a door that is openable by presentation of a reader for admission to the space after validating by reading a first identification at a common identification station provided with a printer. Each space (1; 2) comprises racks (6) of opposite seats, observed by facing cameras (10, 10′) permitting carrying out a continuous surveillance of available stocks.