What happens to the maximum output of a gas turbine during derating?

During derating, the maximum output of a gas turbine is reduced. This process typically occurs due to various factors such as high ambient temperatures, changes in fuel quality, or maintenance considerations. Derating means that the turbine operates at a lower capacity than its designed peak output, which may be necessary to ensure safe and reliable operation under the current conditions.

When environmental factors impose higher heat loads or when the efficiency of the turbine decreases due to factors like fouling, the power output needs to be adjusted downwards to maintain operational integrity and prevent potential damage. Therefore, during derating, the turbine's ability to produce power is constrained, leading to a noticeable decrease in its maximum output capabilities.