Composite Flow Closed Circuit Cooling Tower

I. Overview

Compound closed-loop cooling towers, sometimes abbreviated as Compound Closed Tower, are named due to the mixing of spray water with hot air direction. The spray water flows downward, the wind is divided into two paths, with part of the cool air flowing downward and the other part entering horizontally from the side, interchanging heat with the descending spray water through the packing material to reduce the temperature of the spray water.

Comprised mainly of heat exchanger coils, spray water system, exhaust ventilation system, and the frame shell.

II. Work Process:

The spray pump draws water from the water tank, pumps it to the upper part of the heat exchange coil, and sprays it in an umbrella shape through nozzles, covering the outer surface of the pipe material continuously and evenly, forming a thin water film. Part of the water absorbs the heat energy of the high-temperature refrigerant inside the pipe, converting it into latent heat of vaporization, evaporating into a gas state. The refrigerant inside the pipe material is cooled and condensed or cooled down, while the water that does not evaporate falls back into the spray water tank.

The exhaust system features an intake fan at the top of the tower, drawing air from inside the tower and expelling it outward. Cold, dry air outside the tower enters the tower through the heat exchanger coils and the air intake grate, flowing downward from the top of the coils to carry away the evaporated water vapor, increasing the humidity and temperature of the air. Additionally, cold, dry air is also drawn in from the side of the tower, exchanging heat with the falling spray water through the packing, and the two parts of warm, moist air are then expelled outside the tower by the fan.

In the spray trough, a float valve is installed. It automatically replenishes the supply when the water level is low, ensuring a consistent water level in the trough.

Section 3: Working Principle

The working fluid (water, oil, or other liquids) flows through the coil, where the outer surface of the coil is enveloped by spray water. Heat from the fluid is transferred through the tube walls, forming saturated moist steam with water and air. The heat is then exhausted into the atmosphere by a fan. The spray water, during the recirculation process, is cooled through PVC finned radiators, creating cold water that flows in the same direction as the fresh air. The coil primarily relies on moist heat conduction. A key feature of the composite closed-loop cooling tower's working principle is its ability to inhibit the formation of scale on the outer surface of the coil.

Section 4: Our Advantages

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