Abstract: A water vapor vacuum refrigeration chilled water system with a compressor that allows flash cooling refrigeration system to be practical size and weight. The system utilizes only water vapor. Innovative features include a unique plenum condenser system which allows the refrigeration system to be totally enclosed with little or no effect of ambient temperatures on system performances. The plenum type spray condenser does not need fins or tubes as common refrigeration condensers. The compressor allows the large volume of water vapor to be compressed at high pressure ratios. The compressor is much smaller and lighter than state of the art positive or centrifugal type compressor for the required compression requirements. The compressor sections are made with two dissimilar type compressor rotating sections to obtain the required pressure ratios and flows.

Abstract: A fan assembly provides for the compact and efficient movement of ambient air in areas requiring very low noise generation. In this new configuration, stationary turning vanes are placed at the air inlet followed by a sound cell, axial discharge fan and short axial (vaned) diffuser splitter sections. The stationary turning vanes induce a predetermined air rotation which provides a smooth rotating air flow into the rotating fan blades. The stationary turning vanes also block radiated noise from discharge through the air inlet and support the fan motor. The fan blades impart an opposite rotational momentum just sufficient to obtain an axial or nearly axial velocity discharge increment. The resulting axial fan discharge velocity is slowed in the short diffuser sections where diffuser vanes also block rear noise radiation. The slowed but pressurized air can now enter into an air distribution system with significantly reduced fan generated noise.