Induced draft heat rejection equipment with top mounted backward-curved centrifugal fans
AssigneeEvapco, Inc.
InventorsScott Nevins, Rob Vandenboer, Jeffrey Luke Herwig
Life of this patent
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Abstract
Heat rejection devices, including cooling towers, condensers and closed circuit coolers, having side-mounted backward-curved centrifugal fans mounted on top of the device, above a fan plenum instead of a top-mounted axial fan. Heat rejection capability can be easily modified by adding or subtracting fans without impacting unit footprint. Also, the ability to handle higher static pressures allows for the use of a more densely packed heat exchanger in the same footprint unit, which will increase the unit performance.
Claims12
A heat rejection device comprising:
- a housing having four vertically oriented sides arranged in a rectangle, a bottom portion comprising a water basin, and a top portion comprising a fan section,
- said housing further defining an air intake plenum immediately above said water basin, a fan plenum immediately below said fan section;
- said heat rejection device further comprising a water distribution system below said fan plenum and a heat exchange section below said water distribution system, said water distribution system configured to spray water into said heat exchange section;
- wherein said fan section comprises at least one backward-curved centrifugal fan mounted on its side with an air intake side facing downward.
A dry heat rejection device comprising two heat exchange tube bundles arranged in a V-shaped frame, said heat exchange tube bundles each comprising a plurality of heat exchange tubes arranged horizontally;
- said heat exchange tubes connected at one end to a hot fluid inlet header and at another end to a cool fluid outlet header;
- said dry heat rejection device further comprising a plurality of backward-curved centrifugal fans mounted atop said heat rejection device with air intake side facing downward and configured to draw air through said heat exchange tube bundles into a space between said heat exchange tube bundles, through said air intake side of said backward-curved centrifugal fans and out of said dry heat rejection device.
A cross-flow heat rejection device comprising:
- a housing having four vertically oriented sides arranged in a rectangle, a bottom portion comprising a water basin, and a top portion comprising a fan section,
- said housing further defining a central plenum flanked by two heat exchange sections each comprising liquid dispersion media;
- said heat rejection device further comprising a water distribution system below said fan section and above both said two heat exchange sections, said water distribution system configured to spray water into said liquid dispersion media in said two heat exchange sections;
- wherein said fan section comprises at least one backward-curved centrifugal fan mounted on its side with an air intake side facing downward toward said central plenum.
Dependencies are inferred from the claim text.