STUG – Combined Cycle Journal

STUG

AIR-COOLED CONDENSERS: Corrosion, wind, and gearboxes drive the next wave of ACC improvements

The 15th annual meeting of the Air-Cooled Condenser Users Group (ACCUG) was held July 29-31, 2025, at the Lake Granbury Conference Center in Granbury, TX. Participants included owner/operators as well as leading suppliers and international consultants gathered to discuss improving unit and system performance, share valuable lessons learned, and reduce overall operating expense. Those interested […]

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Easy as 1,2,3: Choose inlet filters based on GT-specific standards

ISO has published the first turbomachinery-specific standards for air intake filters. ISO 29461-1, ISO 29461-2 and ISO 29461-3 establish uniform test methods for efficiency and dust holding capacity, performance in fog and mist, and mechanical integrity at high pressure. While this is not breaking news, the combination of the three standards is a powerful decision-making

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HIGH-ENERGY PIPING: High-temperature tees present growing risk in HEP systems

High-temperature tees in main steam and hot-reheat service are emerging as a serious integrity risk across combined-cycle and advanced coal-fired plants. Speaking at the NBBI 93rd General Meeting, Dr. John Siefert (EPRI) reported hundreds of field leaks attributed to creep-related cracking in wrought tees, with damage appearing in as little as 37,000 operating hours (Fig

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INDUSTRY BRIEFS: What’s happening in the GT industry

People Trinity names Stivender to lead field services The Trinity Turbine Technology team recently announced that Errol Stivender has joined the company as VP of Trinity Turbine Services, overseeing all field service operations going forward. Stivender brings more than 35 years of experience in gas and steam generation as well as the refining and petrochemical

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Plan for 2026: CCGT Industry Events  

Upcoming events where you’ll see CCJ attendance and coverage. Hope to see you there. FT8 Users Group  March 17-19  EPRI Main Campus and Marriott University Place, Charlotte, NC. Details/registration at www.ft8users.com. Contact: Ashley Potts, ft8@ft8users.com.   FT4 Users Group  March 17-19  EPRI Main Campus and Marriott University Place, Charlotte, NC. Details/registration at www.ft4users.com. Contact: Ashley Potts,

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Target repeat chemistry mistakes to stop HRSG and steam-turbine damage (Video)

The International Association for the Properties of Water and Steam (IAPWS) opened its Power Cycle Chemistry (PCC) webinar series, with Dr. Barry Dooley presenting and David Addison moderating, outlining how repeat cycle chemistry situations (RCCS) drive the majority of chemistry-influenced failures in fossil and combined-cycle/HRSG fleets. The message was direct: failures are patterned, measurable, and

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CCJ Historical Society: Looking back from 2025

What your colleagues were telling CCJ subscribers five, 10, 15, and 20 years ago  Five years ago  The 7F Users Group and CCJ collaborated on the first virtual user-group meeting conducted as a result of the global pandemic. It was the launchpad for more than 20 online user meetings facilitated by CCJ during that challenging three-year period.  The Combined

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Focus on D11 strategies, EHC pitfalls, and skilled labor shortages @ STUG 2024

A spirited Roundtable discussion among users kicked off the conference. Some of the more salient topics and concerns include: Changing maintenance strategies to reflect cycling of baseload designed units. Frequency of inspecting l-p blades for erosion from low-load operation (several say once a year, one user inspects twice annually) Incorporating drones into inspection programs (they

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Life-long learning abounds across five user group conferences @ Power Users 2024

The question these days becomes why wouldn’t you send as many of your plant staff as possible to the Power Users Combined Conference, comprising the Combined Cycle Users Group (CCUG), Generator Users Group (GUG), Steam Turbine Users Group (STUG), Power Plant Controls Users Group (PPCUG), and the Low Carbon Peer Group? As amply exhibited in the

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