| 摘要 |
PROBLEM TO BE SOLVED: To provide an indirect vaporization cooling device, in which even when water-spray quantity is limited to change a cooling capacity, there arises no problem of accumulation of impurities in a heat exchanger. SOLUTION: In the indirect evaporative cooling device, water is sprayed in a first fluid path 2 of the heat exchanger 1 having a plurality of fluid paths to cool a fluid in a second fluid path 3. In this case, water-spray area is made variable so as to be decided in accordance with a required cooling capacity, and water is sprayed partly in the path 2.
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