PREVENTION OF ACCUMULATION OF SNOW AND ICE ON OPEN MESH METAL PANELS.
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
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Investigations were conducted to 1 determine the extent to which open mesh metal panels will accumulate snow, and 2 to devise methods for controlling or eliminating accumulation and adhesion. Methods investigated include electrical resistance heating, forced air movement, icephobic surface coatings, infrared heating, mechanical vibration, fluid flow, and power broom sweeping. The influence of meteorological parameters on unheated panel tests was also investigated. It is concluded that passive methods alone are incapable of keeping a perforated steel panel free of snow and ice accumulation under all conditions. Forced air moving at a minimum speed of 300 to 500 ftmin through the panels can prevent accumulation of snow. Near the freezing point, however, and with slight precipitation of snow or ice, forced air can result in ice accretion. Mechanical vibration will remove dry snow but not wet snow or ice. Fluid flow over the panel cannot prevent snow accumulation at moderate rates of fall. Resistance heating using the perforated panel as the resistance element is an effective and practical method. Author
- Structural Engineering and Building Technology