Rotating plate misting fan
A rotating plate misting fan (RPMF) capable of delivering cooling to industrial environments including loading bays for docked trailers, includes a rotating plate assembly configured to eliminate or minimize water collection in the environment area and a controller configured to automatically adjust a vapor rate and fan speed of the fan as a function of distance to objects in proximity to the rotating plate misting fan and psychrometric parameters.
1. A cooling system, comprising:
a water supply;
at least one rotating plate and a housing receiving the plate; each said plate having a surface to which water is provided and an edge of the plate where droplets of mist are expelled;
a hub mounted on a shaft having a longitudinal axis about which the rotating plate rotates;
a flat surface positioned behind the rotating plate, extending outward beyond the peripheral edge of the rotating plate in a radial direction;
a range sensor, a humidity sensor and a temperature sensor;
a fan mounted behind the housing; and
a controller configured to automatically adjust a vapor rate and fan speed as a function of distance to objects in proximity to the rotating plate and psychrometric parameters.
2. The cooling system according to claim 1 , wherein the flat surface is parallel to the plate within +/−20 degrees.
3. The cooling system according to claim 1 , wherein the flat surface is made of hydrophilic materials, or is provided with a textured surface, or is provided with a textured surface made of hydrophylic materials, adapted to reduce droplet contact angle with the surface to below 30 degrees.
4. The cooling system according to claim 1 , wherein said flat surface has an arcuate shape adapted to be attached to the housing proximate the periphery of the plate, wherein the flat surface is further provided with protuberant teeth extending from the flat surface at intervals between an edge of the housing and the rotating plate.
5. The cooling system according to claim 4 , further comprising trenches in the housing.
6. The cooling system according to claim 1 , wherein the housing and a drain operatively connected to the housing are provided with hydrophilic surfaces.
7. The cooling system according to claim 1 , comprising a drain, wherein no portion of the drain is located forward of the rotating plate.
8. The cooling system according to claim 1 , comprising a drain wrapping around a peripheral portion of the rotating plate section, said peripheral portion comprising an arc of 110 degrees or less, measured from the center of the plate.
9. The cooling system according to claim 1 , comprising trenches on the drain adapted to direct droplets of water by capillary action.
10. The cooling system according to claim 1 , wherein the drain is integral with the housing and located behind the rotating plate and behind a forward edge of the housing.
11. The cooling system according to claim 1 , comprising either:
a fan mounted behind the housing and the rotating plate and wherein the drain system is shielded from air produced by the fan by a windshield; or
a guard forward of the rotating plate adapted to prevent user contact with the plate, and formed of a plurality of guides forming a chevron pattern.
12. The cooling system according to claim 1 , further comprising
a temperature sensor and a humidity sensor, and wherein the controller is adapted to automatically adjust vapor rates and/or fan speed, based on an assessment of environmental conditions, productivity, safety, presence, distance, and type of objects in front of the misting fan and psychrometric parameters.
13. The cooling system according to claim 1 , wherein the controller is configured to dynamically modify an operating range ceiling and floor based on input from a user interface.