<P> For cooling CPU cores in computing equipment, the primary advantage of water cooling is that it is capable of transporting heat away from the source to a secondary cooling surface to allow for large, more optimally designed radiators rather than small, relatively inefficient fins mounted directly on the heat source . </P> <P> The water jacket around an engine is also very effective at deadening mechanical noises, which makes the engine quieter . </P> <P> Water accelerates corrosion of metal parts and is a favorable medium for biological growth . Dissolved minerals in natural water supplies are concentrated by evaporation to leave deposits called scale . Cooling water often requires addition of chemicals to minimize corrosion and insulating deposits of scale and biofouling . </P> <P> An open water cooling system makes use of evaporative cooling, lowering the temperature of the remaining (unevaporated) water . This method was common in early internal combustion engines, until scale buildup was observed from dissolved salts and minerals in the water . Modern open cooling systems continuously waste a fraction of recirculating water as blowdown to remove dissolved solids at concentrations low enough to prevent scale formation . Some open systems use inexpensive tap water, but this requires higher blowdown rates than deionized or distilled water . Purified water systems still require blowdown to remove accumulation of byproducts of chemical treatment to prevent corrosion and biofouling . </P>

Disadvantages of liquid cooling system in a car
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