Abstract: An angled germicidal lamp is used to illuminate a coil and drain pan for optimum energy utilization. In one embodiment, a variable angled mount is used for positioning a germicidal lamp at a desired angle at the time of installation. In a second embodiment, a fixed angled mount is used for installation where the desired angle of mounting is known prior to installation. The angled germicidal lamp may be used with any coil installation, including flat, tilted and A-coils. For A-coil installations, a preformed delta plate is provided to ease installation.

Abstract: A double rectification column air separation method and apparatus in which a stream of oxygen-enriched liquid air from a higher pressure rectification column is at least partially vaporized in indirect heat exchange with a stream of purified, compressed, gaseous air. The stream of purified, compressed air is condensed and a stream of the resulting vapor after having been warmed is expanded in a turbine with the performance of external work. After expansion, the resulting vapor is introduced into the lower pressure rectification column and a stream of the resulting condensed air is introduced into the higher pressure column at an intermediate mass exchange level thereof.