Air Cooled Heat Exchangers (ACHEs) are devices that transfer heat from a fluid (liquid or gas) to the surrounding air. They use finned tubes to increase the surface area for heat transfer, with fans blowing air over these tubes to dissipate the heat. ACHEs are widely used in industries like petrochemical, power generation, and chemical processing, especially in regions where water is scarce or unsuitable for cooling. They offer advantages such as water conservation and lower operational costs but require more space and can generate significant noise. These exchangers are critical in applications where efficient air cooling is necessary.