Twenty years ago, few people probably thought that a tube cleaning technique for HRSGs attached to gas-fired turbines would be adapted from those used for solid-fuel boilers. Yet that’s where we are today. Carl Wise, Thompson Industrial Services, and Vince Barreto, PowerPlus Cleaning Systems, showed attendees at the HRSG Forum Supplier Workshop, Oct 7, 2021,

Unlike many user-group events, the 2021 Combined Cycle Conference for the Middle East/North Africa (MENA) region began with a primer on combined-cycle facility design, which set the stage for detailed presentations on gas-turbine, steam-cycle, and balance-of-plant upkeep, repair, and upgrade techniques and technologies. Perhaps the only major subsystem omitted was steam/water treatment for maintaining proper

Doyle Unit 1 is a legacy GE 7B gas turbine with a 64-MVA/14.4-kV, 30-psig hydrogen-cooled generator. A thorough investigation of the engine by Oglethorpe Power Corp engineers revealed degradation of its asphalt insulation and estimated remaining life at less than two years. Several equipment condition and operational performance gaps with the hydrogen cooling system also

The 7F Users Group and CCJ are working together to expand the sharing of best practices and lessons learned among owner/operators of large frame engines. One of the user organization’s objectives is to help members better operate and maintain their plants, and a proactive best practices program supports this goal. Details of the 2020 entries

“Interesting” doesn’t do justice to the generator circuit-breaker failure events described by two utility users at the Combined Cycle Users Group’s 2021 virtual conference, although that’s the word they used. Threatening is more accurate. While the events themselves tend to be unique and site-specific, many readers can relate to the pain, and the “lessons from