As we all know, the discovery of closed cooling tower comes from evaporative cooler, which is a heat exchanger combining the performance of water cooled cooler and conventional cooling tower. It is often called evaporative air cooler.
This principle gradually evolved into the glass steel cooling towers used in today's factories. Now the cooling tower is divided into two kinds of open and closed, which performance is not the same between the two? Xiaobian today simply to tell you.
1. The main cooling medium is in the closed pipe for a long time, does not contact with the air, heat is generally through the wall of the heat exchanger and spray water for heat exchange, so it directly forms the role of cooling, in the daily management is more convenient.
2. Do not need to stop often for maintenance, operation is relatively stable and safe, but also reduce the failure rate of associated equipment, usually more suitable for continuous operation of the related system.
3. Because it is a closed system, it is not often in direct contact with the air, so there will be no algae and salt crystals, so there is no need to remove algae and salt in the later cleaning, and the operation of related equipment is well maintained.
4. The closed cooling tower can be operated in dry mode, which has the advantage that it will not breed a variety of bacteria and is more suitable for use in some dry areas.
5. Because the cooling medium in the closed cooling tower flows in the closed pipeline, the cooling medium is generally used as softening water, and dirt will not be produced in the system pipeline and the heat exchanger of the cooled equipment.
1. The cooled medium of the open cooling tower is concentrated due to evaporation, which requires water replenishment all year round. Because the cooled medium is in direct contact with the air, when it encounters rainy days, the fluid will have corresponding acid reaction, which will cause damage to related equipment.
2. Daily shutdown maintenance is required. Open cooling tower is not suitable for continuous operation system.
3. The cooling medium is mainly open for operation, often exposed to sunlight, it is easy to produce algae and salt crystallization, will affect some performance.
4. There is no way to dry run.
5. When the fluid is a volatile and stimulating solution, there will be some safety risks if the open cooling tower is operated at this time.
6. The cooled medium is circulated in the open, and the internal system pipeline is easy to scale, so as to reduce the heat transfer efficiency of the cooled equipment, so it is necessary to do a good job of cleaning treatment in time.
Post time: Jun-12-2023