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Oasis Iceberg
01
2024
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06
Influencing factors of closed cooling tower type selection
How to select the type of closed cooling tower is a headache for many users at the beginning of contact. How to select the type correctly, which can not only meet the requirements, but also be used for a long time, and play its due role and effectiveness to the limit, needs to consider the following factors: 1. The calorific value of process equipment is the basic data source for all type selection. How much heat is emitted and how much heat needs to be taken away by the cooling tower equipment. If the equipment is electrically driven, part of the input power is used to convert to useful work, and part of the ineffective power needs to be absorbed by the cooling circulating water. What proportion or value is taken directly affects the selection, specification and size of Handan ice-body closed cooling tower.
How to select the type of closed cooling tower is a headache for many users at the beginning of contact. How to select the type correctly can not only meet the requirements, but also use it for a long time, so as to give full play to its due role and effectiveness, the following factors need to be considered:
1. Calorific value of process equipment
This is the basic data source for all types of selection, how much heat is emitted and how much heat needs to be taken away by the cooling tower equipment.
If the equipment is electrically driven, part of the input power is used to convert to useful work, and part of the ineffective power needs to be absorbed by the cooling circulating water.
What proportion or value is taken directly affects the selection, specification and size of Handan ice-body closed cooling tower.
2. Local climatic conditions
The closed cooling tower is cooled by evaporating the water film of the tube shell, absorbing the latent heat of vaporization, and reducing the temperature of the medium fluid inside the heat exchange tube, so the external air parameters have a great influence on the heat exchange effect. The ultimate ideal outlet fluid temperature for a closed cooling tower is the wet bulb temperature at the site.
According to the on-site dry bulb temperature and partial pressure, the wet bulb temperature can be calculated. The drier the climate, the lower the wet bulb temperature, the better the cooling effect, and the greater the cooling capacity; the lower the temperature, the better the cooling effect, and the greater the cooling capacity.
3. Site environment
The cleanliness of the ambient air and the ambient airflow have an impact. Foundry workshop, the dust content in the air is high, brought into the cooling tower by the air, and brought into the cooling tower by the water flow to spray water, and then sprayed on the heat exchange tube shell, which accumulates over time, forming thick dirt and affecting the heat dissipation effect. Under normal circumstances, calculated according to the fouling coefficient 0.86, when the actual impact increases, the cooling effect is reduced, which is difficult to meet the requirements of the production process, or after a period of operation, the heat transfer coefficient is reduced, thereby reducing the cooling effect.
In some heat treatment workshops, cooling towers are arranged beside high-temperature equipment. The heat radiation of high-temperature equipment above 1000 ℃ heats up the surrounding air, objects and the outer surface of the cooling tower, thus increasing the temperature of the air flowing into the cooling tower, reducing the heat exchange coefficient of convection, and greatly reducing the cooling effect.
4. Investment
The greater the safety margin, the longer the life cycle; the better the maintenance, the longer the life cycle;
When designing Handan Bingfeng closed cooling tower, it is basically considered according to the 0.86 fouling coefficient. If the customer's site environment is good, maintenance is timely, maintenance is comprehensive, the heat exchange tube shell has less fouling, the fouling coefficient is low, the cooling effect can be guaranteed, and the service life cycle is long. However, if the safety margin is increased at the time of the initial investment, even if the cooling effect is reduced a little, the use requirements can be met and the actual service life cycle can be extended.
5. Management status
In terms of management, the equipment is mainly maintained in time and in place. First, the motor should maintain oil injection in time to ensure normal operation. Second, the spray tank should be cleaned twice a week to reduce scaling. Third, timely replacement of antifreeze in winter to prevent freezing. Fourth, timely observation and testing of internal circulating water to ensure the cleanliness of pure water in summer and the freezing point temperature in winter; Five to clean up leaves, dust and sundries at the air inlet grid in time, ensure the unobstructed flow passage;
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