The process of cooling water in a cooling tower is a process of heat and mass transfer. The cooled water is distributed to the filler inside the cooling tower with nozzles, water distributors or water distribution trays, which greatly increases the contact area between water and air. The air is circulated by the induced effect of a fan, forced air flow, natural wind or jet.
1. In the traditional design, the closed cooling tower always enters the air from the lower or upper part of the tower. In this way, there are disadvantages such as small circulation area and large flow resistance, which not only affects the heat exchange effect, but also increases the impact on the material. The use of, judging from the current market conditions, this is very unfavorable
2. Closed cooling tower condenser: The condenser is the core component of the cooling tower. Its reasonable structural size and reasonable layout will directly affect the heat exchange efficiency of the entire cooling tower, and it will also affect the cooling water of the entire cooling tower. The cooling capacity. The inclined arrangement of the condenser is beneficial to drain the water in the condenser in winter and prevent the copper pipe from freezing and cracking
3, some technical parameters must be measured during the daily operation of the closed-circuit cooling tower in order to monitor whether the operation level of the closed-circuit cooling tower reaches the control economic index. Therefore, the following technical parameters must be monitored on time and recorded in the operation log:
Stainless steel closed cooling tower. The system resistance of this type of cooling tower is reduced to 1/2 of the original due to the elimination of fillers. With the same fan, it can be seen from the fan characteristic curve that the air volume has increased to 1.2 times the original. The gas-water ratio has also increased to 1.2 times the original, so the cooling temperature difference is 2°C larger than that of the packed tower. The non-filler spray cooling tower has uniform spray mist particles, no clogging, no maintenance, and stable and reliable operation. Since the cooling element (high-efficiency and low-pressure centrifugal atomization device) of the unfilled cooling tower sprays water into 0.5mm tiny droplets, its specific surface area is much larger than that of the water being dispersed into a film by the filler, and the air-water heat transfer surface area is large, and The water distribution is uniform, avoiding the uneven temperature distribution of the cooling point caused by the dead zone and channel flow caused by the aging, deformation and blockage of the packing, and the cooling effect is obviously better than that of the packing tower.
Question 1: The return water temperature of the closed cooling tower is 35 degrees and the outlet water temperature is 20 degrees. Do you need to take anti-freezing measures? In addition, how to clean the scale on the copper pipe?
For a closed cooling tower, if the return water temperature is 35 degrees and the outlet water temperature is 20 degrees, then there is no need to take anti-freezing measures, because there will be no freezing at this temperature. To clean the scale caused by the copper pipes of the cooling tower, organic acids can be used. However, before use, it is necessary to conduct a test to see if there will be a reaction between the two, so as not to damage the copper tube.
Question 2: What are the main heat transfer coefficients of a closed cooling tower?
The heat transfer coefficient of a closed cooling tower has three related factors, which are the convective heat transfer coefficient of the fluid in the tube, the heat transfer coefficient of the tube wall, and the convective heat transfer coefficient of the spray water outside the tube. . Moreover, these three are very important parameters, so they should not be underestimated.
Guangdong Trlon Energy-saving Air Conditioning Equipment Co., Ltd.
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