Cross-Flow Closed Cooling Tower
Cross-flow overview
Cross-flow closed cooling tower is named because the spray water and hot air are in the horizontal direction. The spray water flows from top to bottom, and the wind enters horizontally from the side, passing through the middle of the heat exchanger coil, cross-exchanging heat with the falling spray water, reducing the spray water temperature.
It is mainly composed of heat exchange coil, spray water system, exhaust system, frame shell
Working Process
The spray pump draws water from the water tank and pumps it to the upper part of the heat exchange coil. It sprays in an umbrella shape through the nozzle and covers the outer surface of the pipe continuously and evenly, forming a thin water film. Part of the water absorbs the heat energy of the high-temperature refrigerant in the pipe, converts it into latent heat of vaporization, evaporates into gas, and the refrigerant inside the pipe cools down or condenses into liquid. The unevaporated spray water falls back to the spray water tank; the exhaust system, the tower top fan is suction type, exhausts air from the tower to the outside, and the cold and dry air outside the tower enters the heat exchanger coil from the side, takes away the evaporated water vapor, and the air humidity and temperature are increased. It is extracted out of the tower by the fan between the two heat exchange coils.
A float valve is installed in the spray water tank. When the water level is low, the supply is automatically replenished to ensure a certain water level in the tank;
Operation principle
Internal circulation water system: The circulating water cooled in the coil flows out from the tower body and is sent to the heat source (cooled equipment) by the system circulating water pump. The circulating water heated by heat exchange enters the coil for cooling.
External circulation water system: After the external spray water cools the circulating water inside the coil by contacting with the coil and the filler, it falls into the lower water tank and is sent to the spray water tank by the spray water pump for recirculation
The internal circulating cooled water exchanges heat and mass with the spray water and air outside the tube through the coil, avoiding water pollution caused by direct contact between the cooled water and the air. Since the spray water is pre-cooled by the PVC filler, its heat exchange effect is more obvious.
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Cross Flow Type Cooling Tower Cross Flow Cooling Tower Design Images
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