The TDS (Total Dissolved Solids) limit for cooling towers is not a fixed value and may vary depending on the specific type of cooling tower, its use, water quality requirements, and operating conditions. In general, the TDS limit of cooling towers is usually set within a range to ensure the normal operation of cooling towers and the stability of water quality.
In some cases, the TDS limit for cooling towers may not exceed 1000mg/L to reduce water concentration and fouling. In other cases, the limit may be set at no more than 1500 mg/L. It is important to note that these values are general reference ranges and are not applicable to all types of cooling towers.
In order to ensure the proper operation of the cooling tower and extend its service life, it is recommended to set the appropriate TDS limit according to the specific situation of the cooling tower and the manufacturer’s recommendations. In addition, it is important to regularly monitor and adjust the water quality of the cooling tower to keep it within the appropriate range.
If you need more specific information about the TDS limits for a particular cooling tower, it is recommended to consult the relevant technical documentation or contact the cooling tower manufacturer for accurate data and recommendations.
Why isn’t the TDS limit for cooling towers fixed?
The TDS (Total Dissolved Solids) limit for cooling towers is not fixed because it is affected by a combination of factors. These factors include, but are not limited to, the type of cooling tower, design, operating environment, water quality requirements, and the characteristics of the cooling water circulation system.
Cooling tower types and designs:
Different types of cooling towers (e.g., open, closed, counterflow, cross-flow, etc.) differ in design and operating principles, so their water quality requirements and TDS limits will also vary.
Operating environment:
The operating environment of the cooling tower, including temperature, humidity, wind speed, etc., will affect the cooling effect and the evaporation rate of water. In environments with higher humidity or higher temperatures, the rate of evaporation of water may increase, resulting in increased concentration and higher TDS concentrations.
Water quality requirements:
Different industrial processes have different requirements for the water quality of cooling water. Some industrial processes may require lower TDS concentrations to prevent scaling or corrosion, while others may have less stringent requirements for water quality.
Cooling water circulation system:
Cooling towers are usually connected to the cooling water circulation system, which may include make-up water, sewage, water treatment equipment, etc. These factors affect the TDS concentration of water in the cooling tower. For example, if the make-up water has a high TDS concentration, or if the blowdown is not frequent enough, the TDS concentration in the cooling tower may rise.
Fouling & Corrosion:
High TDS concentrations can cause fouling or corrosion inside cooling towers, affecting their performance and life. However, too low TDS concentrations can also lead to certain types of corrosion problems. Therefore, it is necessary to find an appropriate balance.
In summary, due to these factors, the TDS limit for cooling towers is usually set on a case-by-case basis, rather than a fixed value. In order to ensure the proper operation of the cooling tower and extend its service life, it is recommended to set appropriate TDS limits according to the specific situation of the cooling tower and the manufacturer’s recommendations, and to monitor and adjust the water quality regularly.
