Advanced GTs – Combined Cycle Journal

TBC DURABILITY, PART I: Effect of hydrogen combustion on thermal barrier coatings

7F Users Group, Advanced GTs, Best Practices / By Team-CCJ

Decarbonization of the electric power industry will increase the use of hydrogen as a gas-turbine (GT) fuel—alone or in combination with natural gas. Issues for hot-section components when burning hydrogen include the following: increased flame speed, temperature, quenching distance, steam in combustion products (from 12% to 21%), and loading. The resulting increase in erosion and […]

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PROCESS DIAGNOSTICS: Software-as-a-service diagnostics underscores whole-of-plant approach

Advanced GTs, Best Practices, HRSGs / By Team-CCJ

Metroscope, a relatively new entrant (2023 launch) to the US real-time powerplant process diagnostic software market, recently conducted a webinar to build more awareness of its technology and to differentiate it from other packages (some of which have been evolving since the early 1990s and can be considered “standard” in combined-cycle plants and in centralized

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BOILER VALVES: Avoid Stellite delamination with alternative hardfacing

Advanced GTs, Best Practices, HRSGs, STUG / By Team-CCJ

By Richard Laukam, ValvTechnologies LLC Steam stop valves, located at the boiler outlet, provide isolation. These typically are wedge-type gate valves, stop-check valves, or parallel-slide gate valves. Hardfacing often is applied to the seat and closing member (wedge, plug, or discs) to reduce wear and extend the duration of leak-free service. Hardfacing is the building

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HRSG need not be a limiting factor in GT upgrade

Advanced GTs, Best Practices, HRSGs / By Team-CCJ

By Vignesh Bala, Vogt Power Editor’s note: This is the second of three articles exploring the impacts of gas-turbine upgrades on heat-recovery steam generators. It focuses on “re-rating” of the HRSG after the upgrade to extract maximum benefit from the work. Part 1, which examined the driving factors behind GT upgrades, appeared in August. Part

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ACGTUG: EPRI brings together leading-edge turbine users to drive collaborative research, solutions

Advanced GTs / By Team-CCJ

Next meeting: Nov 12-14, 2024 • EPRI Campus • Charlotte, NC Inquiries: ACGTUG@epri.com • Details at www.epri.com/events Welcome the latest addition to the worldwide gas-turbine user community: The Advanced Class Gas Turbine Users Group. It was formed by EPRI to focus on issues common to the M501G, M501J, SGT6-6000G, SGT6-8000H, SGT6-9000HL, and other advanced frames

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HRSG REPAIRS: A tale of two tube leaks

Advanced GTs, HRSGs / By Team-CCJ

Tube leaks in heat-recovery steam generators certainly are not rare. CCJ has published many articles on the subject over the years—including one in the first issue (Q4/2003) that touted the benefits of full-penetration welds in HRSG tube panels to improve fatigue life. That said, why should you read yet another article on tube leaks, these

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Case studies on HP economizer tube leaks at Bouchain CCGT

Advanced GTs, HRSGs / By Team-CCJ

By Guillaume GROGNET, Maintenance Mechanical Manager, Electricité de France Bouchain CCGT, operated by Electricité de France (EDF), in Northern France was commissioned in July 2016 and has accumulated over 45k operating hours and 650 GT factored starts as of Q4/2023. Due to European grid code and recent grid operation modifications, French and European CCGTs operate

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2024 PSM ASSET MANAGERS CONFERENCE: FlameSheet™ keeps getting better

Advanced GTs / By Team-CCJ

This is the second segment of CCJ’s three-part report on PSM’s 2024 Asset Management Conference, conducted at the Westin Beach Resort in Fort Lauderdale, Fla, January 29-February 1. The first segment was published earlier this year, the third installment will appear in CCJ later this year. The focus here is fourfold: FlameSheet™ keeps getting better

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