Is Wet Compression Safe for Gas Turbines? Proven Success with MeeFog Systems

How Wet Compression Enhances Turbine Output and Efficiency

Wet compression involves the injection of atomized water into the compressor of a gas turbine engine. These fine droplets evaporate within the compressor, creating an evaporative intercooling effect. The result? Lower compressor work, increased mass flow, and greater shaft power. Estimates of effectiveness vary, with power increases of approximately 5% to 10% per 1% of water injected relative to the inlet air mass flow. Some operators using wet compression systems inject water at a rate equal to 2.5% of the mass flow of air entering the gas turbine.

Blade Erosion Myths

Many plant managers are aware of the risks of blade erosion from water injection but may not fully understand what causes it or how to avoid it. One of the most persistent misconceptions about wet compression is that it causes compressor blade erosion. This belief stems from older systems that used outdated nozzles, producing oversized droplets that physically damaged blades. Large droplets can erode turbine blades through liquid impaction erosion, where water droplets cause microfractures, leading to eventual pitting and material loss.

Why Droplet Size Matters: Protecting Compressor Blades with MeeFog Systems

MeeFog eliminates this risk by generating ultra-fine, 20-micron droplets that evaporate rapidly, eliminating the threat of blade impact or material loss. This difference in droplet technology is critical, and often misunderstood. Older systems created real damage, but today’s technology eliminates that risk. Still, legacy perceptions persist, especially among long-time operators.  If your team is still operating under outdated assumptions, you could be leaving millions on the table. The data is clear: modern wet compression, done right, delivers proven, profitable results.