What is the purpose of the concentration ratio of circulating water?

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The circulation water concentration ratio is defined as the ratio of the ion concentration in the circulation water to that in the make-up water, using an ion that does not change under external influences as a representative. Simply put, it is the concentration ratio of circulating water to make-up water, and it serves as a standard for measuring the quality of circulating water. It is generally calculated by analyzing CL (chloride) ions, but when the circulating water has been chlorinated, it can no longer be calculated using CL ions; instead, the conductivity of the circulating water and make-up water or K (potassium) ions must be used for calculation. Benefits of increasing the concentration ratio of circulating water: 1. Reducing the amount of make-up water used, thereby conserving water resources ；            2. Reduce the amount of wastewater discharged, thereby minimizing environmental pollution and the volume of wastewater that needs to be treated ； 3. Reduce the consumption of water treatment chemicals, thereby lowering the costs associated with circulating water treatment. Disadvantages of too high a recirculating water concentration ratio: 1. It increases the hardness and alkalinity in the recirculating water, enhancing the tendency for scaling and reducing heat exchange efficiency ； 2. The turbidity of the water increases, raising the likelihood of the growth of algae and microorganisms, which leads to corrosion ； 3. Both scaling and corrosion affect the effectiveness of water treatment chemicals, which hinders the control of microorganisms. To ensure the cooling efficiency of the circulating water, it is necessary to properly control its concentration ratio. Generally, we keep the circulating water concentration ratio below 5 times. If this value is exceeded, it is necessary to add or remove water from the cooling tower, as well as replace the water. The calculation formula generally uses the concentration of CL ions or K ions in the circulating water and make-up water. N = S_circ / S_supplementary. Here, N represents the concentration ratio; S_circ is the salt content of the circulating water, in mg/L, while S_supplementary is the salt content of the supplementary water, also in mg/L