To provide a cooling method and a cooling system capable of restraining the occurrence of various troubles with a cooling tower such as a water quality of cooling water is deteriorated, efficiency of heat exchange is deteriorated, a microorganism such as bacteria and an ameba is propagated, a scale and slime are generated or stuck and the quantity of chemical used for preventing corrosion is increased, even when operating over a long period.
This cooling system 100 is provided with a nano-bubble generator 40, and includes and circulates the chemical turned into a nano-bubble and the nano-size in the cooling water. A residual chlorine gauge 31 and a TOC gauge 32 are arranged in a cooling system water tank 33. The nano-bubble generator 40 generates the cooling water including the chemical turned into the nano-bubble or the nano-size by controlling motor-operated valves 44 and 45 and a chemical tank pump 46 by a residual chlorine concentration adjusting gauge 51 in response to the residual chlorine concentration in the cooling water, and controls a motor rotating speed of a gas-liquid mixing circulating pump by a TOC adjusting gauge 52 in response to the TOC concentration.
COPYRIGHT: (C)2009,JPO&INPIT
Nakajo Sumi
Imazu Shiro
Masanori Kataoka
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Takaaki Yasumura
Takeshi Oshio