The water spray cooler is a direct-contact air-to-water heat exchanger designed to cool the hot working areas of deep mines. This cooler was originally developed by the Bureau of Mines. Recent tests with water spray coolers at the Homestake Gold Mine in South Dakota proved their thermal performance to be superior to that of the conventional finned-coil coolers in use at the mine. Testing has also shown that water spray coolers require little maintenance, whereas finned-coil coolers need maintenance for dust removal every 2 weeks.
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