Compressed Air Best Practices - November 2008 - (Page 16) | 11–12/08 Focus Industry STEEL & METALS | COMPRESSED AIR AUDIT OF THE MONTH Steel Processing Demand Side Audit Replacing “Air Horns” There are 50 “air horns” or “air movers” in use. They are consuming 4,700 scfm of compressed air. These items are part of a family of products known as “Portable Ventilators.” They are available in various designs to move large volumes of air (1,000 to 10,000 cfm) in plants for many applications. The most common drives are electric, but they also come in Venturi air drives, which use high-pressure compressed air to pull ambient outside air by a Venturi action. Generally, these use from 100 scfm each to 300 scfm for the most common 6" and 8" sizes. As we reviewed the North Plant, we noted the extensive use of air movers or air horns throughout many areas. All of those observed use the compressed air Venturi drive-type; none were electric drive. Furnace de-scale utilizes Venturi air horns to cool down the furnace. Many of these are supplied by the contractors, but all that we saw during the Furnace #1 de-scale were running on plant-supplied compressed air. “Annual energy savings will be $93,000 per year.” 16 www.airbestpractices.com http://www.airbestpractices.com
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