Hybrid Wet Dry Cooling Tower with Dry Mode & Wet-Dry Mode Operating

Dry Mode

In dry mode, the hot process fluid enters the dry finned tubes from the inlet of dry finned tubes, fows out from the outlet of the finned tubes, and then flows into the smooth coils from the inlet of smooth coils. At the same time, the fan is turned on, and the spray pump is turned off. The axial fan draws the air upward through the air inlet louver. When the air flows through the coil and undertakes heat transfer, a portion of the heat is taken away and is dissipated to the atmosphere. The cooled process fluid flows out of the smooth coil outlet and returns to the internal circuit.

Wet-Dry Mode

In this mode, the hot process fluid enters the dry finned tubes from the inlet of dry finned tubes, fows out from the outlet of the finned tubes, and then flows into the smooth coils from the inlet of smooth coils. At the same time, the spray system is on and the fan is turned on as well. The heat of the process fluid undertakes heat transfer through via tube walls and the heat is transferred to the spray water flowing through the outside of the tube. The process water becomes cold and is then discharged from the smooth coil outlet for internal circulation. Driven by the fan, the air outside the unit enters from the air inlet and flows upward through the coil, in the opposite direction to the water. A small portion of the water evaporates and flows through the drift eliminator, excess moisture is collected into the water tank and hot, humid air is dispathced into the atmosphere from the top of the closed circuit cooling tower. The rest of the water falls into the water tank at the bottom and is recycled by the pump into the spray system, and then is sprayed onto the coil.