The medium to be cooled is allowed to flow through tubes. Water is sprayed over tubes to form a water film surface; cool air is blown over the tube surface with help of induced draft fans mounted at the top.

Temperature of both cool air and sprayed water rises, partial water will transform from liquid phase to vapor. Latent heat of vaporization water will carried out massive heat. While, a negative pressure will be formed inside the heat exchanging tube cabinet under the effect of fan’s induced draft, which will enhance the evaporation of sprayed water, thus increasing heat transfer efficiency.
 
Non-vaporized water will be cooled down during falling into the circulation water tank. The water inlet valve will automatically refill cooling water to keep a certain water level and a normal circulating operation. While the medium to be cooled remains in a closed circulation.

The medium to be cooled is allowed to flow through tubes. Water is sprayed over tubes to form a water film surface; cool air is blown over the tube surface with help of induced draft fans mounted at the top.

Temperature of both cool air and sprayed water rises, partial water will transform from liquid phase to vapor. Latent heat of vaporization water will carried out massive heat. While, a negative pressure will be formed inside the heat exchanging tube cabinet under the effect of fan’s induced draft, which will enhance the evaporation of sprayed water, thus increasing heat transfer efficiency.
 
Non-vaporized water will be cooled down during falling into the circulation water tank. The water inlet valve will automatically refill cooling water to keep a certain water level and a normal circulating operation. While the medium to be cooled remains in a closed circulation.