Production Technology [Weekly Topic]: How to Deal with High Temperatures in Circulating Water in Summer (2011-03-21~27)

In fact, the increase in circulating water temperature during summer is a problem that plagues many manufacturers; it leads to a decline in the cooling efficiency of heat exchangers, a significant reduction in the compressor’s air delivery capacity, and a decrease in production capacity, among other issues. Simply reducing the temperature of circulating water can sometimes be difficult; in fact, the effectiveness of a cooling tower is often determined during the design phase, and it is closely related to various factors such as the type of cooling tower, its structure, the type of filler used, the choice of fans, and the construction methods employed. If the preliminary work is not done properly, it’s a bit unrealistic to try to lower the temperature later on. I think we can try using some efficient fillers, as everything else in the cooling tower has already been finalized; replacing it would be impractical or rather troublesome. Options such as keeping the fan running continuously and adding water once more could be considered.

1. Increase the power of the fan. 2. Insulate the pipelines to prevent heat loss. 3. Drain some of the circulating water and replace it with fresh water (a wasteful practice that is not recommended). 4. Lay the circulating water pipelines on the shaded side of the building. 5. Bury the pipelines underground

Our facility has dug a deep well next to the river; after the river water seeps underground, the temperature of the water in that well is lower than that of the water in the river. As a result, during summer, we need to operate 1 to 2 more fans than usual. The pipes leading to the user area are buried at a depth of one meter underground, so the water temperature when it reaches the equipment is not much higher than usual.

Increasing the speed of the fans in the cooling towers, replacing them with more efficient fillers, and raising the frequency of water replacement are all options, but they come at high costs. Our factory plans to combine the circulating water from several units to build a large cooling tower, similar to those used in thermal power plants, in order to handle the water treatment centrally and reduce consumption per unit.

1. The number of cooling tower startups will increase. 2. Adjust the power of the fan. 3. Ensure proper insulation for pipes where circulating water leaks out. 4. Increase the amount of make-up water. 5. Deep wells can be used.

Reply to 1# shmily327: If the temperature of the surrounding environment is too high, it is generally difficult to reduce it. This aspect needs to be taken into consideration during design. The solutions are as follows: ; E+ b8 M- j. l1 H+ v 1. Reduce the temperature of the surrounding environment – that is, increase air circulation. 2. Change the power of the fan – the effect is not very significant. 3. Increase the amount of water used for drainage and replenishment – experiments have shown that excessive use of such water increases costs

The design of the cooling tower determines its heat exchange capacity; to keep the temperature of the circulating water within acceptable limits during summer, it is necessary to address the issue at the source of the process, such as by implementing various energy-saving measures to reduce the amount of heat generated in the process.

Generally, circulating water uses underground pipes; if the temperature becomes too high, it is very difficult to lower the temperature of the circulating water itself. Let’s discuss whether the following measures could work: 1. Introduce a supply of cold water into the main circulating water pipeline. The issue is where this cold water will come from – it could be by adding additional air coolers or cooling towers, or by installing a separate heat exchanger. It can be considered for use when there is still a surplus in the cooling tower. 2. Could spraying be considered directly on the circulating water pipeline, with concentrated spraying in areas where such pipelines are gathered, and temporary fans installed to create a temporary system similar to air cooling? Alternatively, several sets of temporary fans can be added near the cooling tower basin to facilitate forced ventilation. 3. Given the limited possibility of reducing the temperature of the circulating water, and with the return flow of the circulating water set to full capacity, could it be considered to remove the insulation from the heat exchanger (if any) and directly spray water onto the heat exchanger?

We haven’t encountered this problem yet; perhaps summer hasn’t arrived yet. However, the approach used on the second floor is worth emulating; we also use deep groundwater, which would be better.

If it can’t be resolved properly, simply focus on cooling the equipment that requires circulating water