With a nominal efficiency of 0.2 kw per ton, evaporative cooling towers are among the most energy-efficient and cost-effective technologies for rejecting waste heat from air conditioning and other heat-exchange processes to the atmosphere. In the process, however, they use significant volumes of water. This article will discuss practical water-conservation opportunities for cooling towers. Background Evaporation (E). To maximize efficiency, one must understand how water is used inside of a ...

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