Importance

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Abstract

An impeller design is provided for use in evaporating water from an ambient water body. The impeller includes a hub and a plurality of impeller blades. The blades have one or more profiles that correspond to certain profiles characterized by the National Advisory Committed for Aeronautics parameters known as NACA 4 parameters. One or more blade angles also may more specifically identify the blade profiles. The impeller blades also may be identified by a plurality of profiles on a given blade, preferably including a base profile and a tip profile. The impeller optionally but preferably is made of a fiberglass material. In preferred embodiments it constitutes an integrated unit, such as a unitary molded or cast unit. It may be coated by a suitable corrosion-resistant coating, for example, such as a clear coat or gel coat. Various features of the impeller hub also are disclosed. An impeller system also is disclosed. The system includes an impeller as described above and means for mitigating non-longitudinal flow in the air flow channel in which the impeller caused air movement. The means for mitigating non-longitudinal flow preferably includes a plurality of guide vanes disposed downstream of the impeller.

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First Claim