Why does the circulating cooling water of a heat exchanger need to adopt the bottom-inlet and top-outlet mode?

The adoption of the bottom-inlet and top-outlet mode for circulating cooling water is mainly based on the following reasons:

Structure Diagram of Heat Exchanger

1. Improving Cooling Efficiency

When cooling water enters from the lower part of the equipment, it can better absorb the heat generated by the equipment and then be discharged from the upper part, forming an effective convective circulation. This flow pattern helps distribute heat more evenly on the equipment surface, thereby enhancing heat transfer efficiency.

2. Preventing Air Infiltration

The bottom-inlet and top-outlet design avoids air entering the equipment, ensuring continuous and stable flow of cooling water. This reduces the risk of decreased cooling performance or equipment failures caused by air intrusion.

3. Preventing Equipment from Compression

When cooling water enters from the lower part of the equipment, it forms a water column that withstands the internal pressure of the equipment. This prevents the top of the equipment from being compressed by the weight of the cooling water, helping to reduce the risk of equipment deformation or rupture.

4. Facilitating Discharge

When cooling water is discharged from the upper part, gravity can be used to directly drain the water from the equipment, ensuring thorough and clean discharge. Meanwhile, this design helps reduce dead zones inside the equipment, ensuring the uniformity of cooling water flow.

5. Optimizing Water Circulation

The bottom-inlet and top-outlet design allows the eddy current generated by the circulating water pump to better stimulate water flow, thereby improving the efficiency of the circulating water system. Additionally, this design helps reduce dead zones in the water flow and enhance water circulation efficiency.

In summary, the bottom-inlet and top-outlet mode for circulating cooling water helps improve cooling efficiency, protect equipment, prevent air infiltration, and facilitate discharge. It is a widely adopted cooling method in industrial production.