High-pressure fogging, a cost-effective method to cool gas-turbine inlet air at power plants, works successfully as an alternative to evaporative coolers and chillers.
Media-type coolers remain the most common, capable of increasing turbine power output from 5 percent to 15 percent at an electric-generating plant. This system pulls air through a wetted honeycomb-like material, usually composed of cellulose fiber. Inside, the air evaporates off the convoluted surfaces of the wetted media, thereby cooling the inlet air. This technique does not require compressors, chiller coils or cooling towers. It's relatively inexpensive to install and functions over a range of conditions.