Modern chiller systems are designed to operate with little or no fouling on condenser tubes. A layer of calcium carbonate scale 1/16" thick on the condenser tubes of a high efficiency centrifugal chiller negatively impacts electrical consumption by 14%.
Biofilm has an even greater effect. Defined as a slimy substance formed on heat transfer surfaces by water-borne bacteria, is four to five times more insulating than calcium carbonate scale. A biofilm layer 1/16" thick increases electrical usage by as much as 35% and can cause shutdown of the equipment.
Electronic, magnetic and other non-chemical water treatment devices work by causing the precipitation of calcium carbonate. This results in scale formation on condenser tubes, increased electrical usage and an expanded carbon footprint. When these devices are used without a biocide, the resulting biofilm exacerbates the problem.
Poorly maintained or inferior cooling water chemical treatment progrmas also lead to foluing by scale and biofilm. This produces the same negative environmental and economic results as the non-chemical devices. Our Green Program, with state-of-the-art technology, provides optimal conditions for the condenser tubes and the entire system. This allows chiller systems to operate at maximum efficiency with a minimal carbon footprint.
For more information on energy use, visit the Department of Energy's Energy Information Administration at:http://www.eia.doe.gov/