1、 Dry wet combined operation mode
In this mode, the fluid first enters the dry fin coil for cooling, and then enters the main evaporation coil section, which is further cooled before flowing out. The spray water is pumped from the cold water tray to the spray water distribution system above the main evaporation coil. Evaporation heat exchange is carried out on the surface of the evaporation coil wetted by spray water, and the spray water falls into the collection tank after passing through the coil. The air flowing through the coil is saturated with steam and carries away heat, while the fan cools the fluid inside the finned tube. In the dry wet combined operation mode, sensible heat and latent heat of evaporation are utilized. Compared to traditional evaporation equipment, even under harsh conditions, the tendency to produce white mist can be greatly reduced, and a large amount of water can be saved. Under the conditions of reducing heat load and/or environmental temperature, the consumption of evaporative cooling and water is significantly reduced due to the continuous decrease in flow rate through the evaporative coil. This is achieved by adjusting the bypass flow rate through an automatic valve, while also controlling the outlet fluid temperature. This automatic control device can ensure maximum utilization of finned tube cooling and greatly reduce the heat transfer of the main evaporation coil. In the dry wet combined operation mode, this heat transfer method and flow control method can achieve significant water conservation. Due to the reduction of evaporation water and the heating of the discharged air through dry fin tubes, the BrapuBPC-DE series of dry wet combined cooling tower products have reduced the occurrence of white mist phenomenon.
2、 Dry operation mode
In dry operation mode, the spray water system is turned off to save water pump energy consumption. The fluid to be cooled enters the main evaporator coil in series from the finned tube, and the flow control valve remains fully open to ensure that the fluid flows through both coils, thereby maximizing the utilization of the heat exchange surface. In this mode, there is no evaporation consumption of water and no white fog is generated at all. The product can choose the Dry-bulb temperature tangent point at any temperature, depending on the specific needs of the project. When the equipment continues to operate in dry mode for a long time, it is recommended to empty the water in the water tray, so that there is no need for antifreeze protection and water treatment.
