Humidified Air Injection Raises Peak Turbine Output

摘要

Additional Low-cost Power can be Obtained from Gas Turbines and Combined-cycle Power Plants during peak demand periods by injecting supplementary air—externally compressed, humidified and heated—into a combustion turbine (CT) upstream of the combustors. This novel approach, denoted CT-HAI (HAI is an acronym for humidified air injection) for simple cycles and CC-HAI for combined cycles, results in significant power augmentation over the whole range of ambient temperatures, but is the most effective at high ambient temperature conditions when normal unit output reduction is most severe. These new concepts are a further extension of the power augmentation method presented in Power Engineering's March 1999 issue.