What Is Air Inleakage and Why It's Quietly Costing Your Plant Money

Air inleakage happens when outside air is drawn into a condenser or turbine system that's operating under vacuum. It sounds minor. In practice, it's one of the most common and most overlooked sources of lost efficiency in power generation and industrial steam plants.

How Air Gets In

Any joint, seal, valve packing, or flange operating below atmospheric pressure is a potential entry point. Over time, gaskets degrade, expansion joints fatigue, and low-load operation opens up leak paths that weren't there when the unit was commissioned.

Why It Costs Real Money

Excess air in the condenser raises backpressure, degrades heat transfer, and forces the vacuum system to work harder. The result is higher heat rate, reduced MW output, increased auxiliary power consumption, and accelerated wear on air removal equipment. On a large unit, even a modest inleakage problem can translate into six figures of lost value over a year.

Finding It Before It Finds You

Helium mass spectrometer leak detection remains the gold standard for pinpointing inleakage sources with precision, letting maintenance teams target repairs instead of guessing. Regular testing, especially after outages or major maintenance, catches problems while they're still cheap to fix.

StrongForce specializes in air inleakage testing and plant performance evaluation for power generation and industrial facilities. If your heat rate has been creeping up, contact us at 833-735-3257 or info@StrongForceInc.com to talk through a testing plan.