Jiangsu Ocean Cooling Equipment Co., Ltd.
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What are the considerations for closed cooling tower engineering design?

  1146  2023/01/05

1. Air environment
The closed cooling tower must supply ample fresh air at the air inlet. When the device is located near a wall or in a confined space, corresponding measures must be taken to ensure that the discharged high-temperature, saturated gas will not flow directly to the air inlet without turning.
2. Fluid compatibility
The fluid to be cooled by the equipment must be compatible with the material of the coil. Fluids that are not compatible with the material of the coil can cause corrosion and damage to the coil. Certain fluids may require pressure cleaning or mechanical cleaning on the inside of the coil from time to time. In this case, the coil provided must have this capability in the design.
3. Piping technology
Equipment piping design and installation should conform to general engineering practice experience. In a multi-unit system, the pipeline layout should be symmetrical, and the pipeline size should be considered in accordance with low flow rate and low pressure drop. The standard closed cooling tower should be equipped with an expansion tank so that the liquid can expand and release the air in the system. The connecting pipes should use appropriately designed pipe hooks and brackets to avoid any load on the connection of the equipment. Do not fix the pipe support on the frame of the equipment.
4. Noise requirements
Closed coolers are provided with acoustic rating data that can be used to calculate the sound pressure of the equipment. When making such calculations, the designer must take into account the influence of the specific geometric dimensions of the installation, as well as the distance and orientation between the equipment and the noise-sensitive area.
5. Coil freeze protection
When the ambient temperature is lower than the freezing point, even if the circulating water pump and fan are not running, the industrial fluid equipment will have heat loss. When the circulating fluid has no thermal load, the coil will freeze even at full flow. In order to avoid this possible icing problem, the optional protective measures are easy to adopt. If the system permits, the best protection measure for coil icing is to use antifreeze (which can be purchased from our company).
6. Water tank freezing protection
When the ambient temperature is lower than the freezing point and the equipment is shut down, the water in the pool must take anti-freezing measures. Should provide further anti-icing protection, drain the water in the sump to an auxiliary remote sink indoors, or provide assistance to the water in the water distribution pan through immersion electric heaters, steam heating coils or hot water coils heating. During the shutdown period, the exposed water pipes and water supply pipelines that are not drained should be insulated with electric heating tapes.  
7. Water treatment
The closed cooling tower water system is continuously recycled in the circulating cooling system. Due to the changes of water temperature and flow rate, the water is constantly evaporating, the concentration of various inorganic ions and organic substances, sunlight, wind and rain, and the entry of dust and debris. Due to the influence of factors, system pipes and equipment (heat exchangers) will produce a large amount of scale and dirt (sludge), which will cause a decrease in heat exchange efficiency, pipe blockage, equipment corrosion (severe perforation and scrap), and increase in operating and maintenance costs. And other issues.