Closed cooling towers are hailed as energy-efficient and environmentally friendly equipment, with an increasing number of users opting for these units to replace their existing open towers. A simple data analysis comparison reveals the energy differences between the two. Energy consumption primarily revolves around two aspects: water and electricity. These are the inevitable energy expenditures for any cooling tower, unless you choose not to operate the equipment.

Firstly, let's examine the water consumption, which generally occurs in two aspects: first, the overflow after sprinkling, and second, the evaporation of water.

Let's look at the open cooling towers, where the water spray overflow rate is generally between 2% and 3%. Assuming the towers run for 10 hours a day, 280 days a year excluding holidays, and with an actual flow rate of 6,000 cubic meters per hour for open cooling towers, the calculation is: 6,000 * 2% * 10 * 280 = 336,000 tons of water. For closed cooling towers, the spray overflow is significantly less, as the spray occurs within the tower, nearly negligible, let's use 0.5% for calculation. With the same 10-hour daily operation for 280 days, a cooling tower with a flow rate of 4,500 cubic meters per hour is sufficient to achieve the same cooling effect. The calculation is: 4,500 * 0.5% * 10 * 280 = 63,000 tons. It's clear that the design differences lead to a staggering 200,000+ tons of water waste. This doesn't even account for evaporative water loss. Larger water pools in open towers waste more water due to increased evaporation area, while closed cooling towers have no pools, resulting in zero consumption. From a price perspective of one ton of water, just one such device can save the company hundreds of thousands of dollars annually.

When comparing electrical energy, it's relatively similar because both are powered by equipment with nearly the same power rating. If the operation time for both is consistent, the electrical energy consumed is generally comparable.

In summary, energy-saving calculations for closed-loop cooling towers can effectively exclude the open towers. Moreover, with the current emphasis on energy conservation and environmental protection, this is the trend of the times. Therefore, closed-loop cooling towers are increasingly favored by a wide range of users.