Best Practices – Page 2 – Combined Cycle Journal

Best Practices

BOILER VALVES: Avoid Stellite delamination with alternative hardfacing

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

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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Five plants earn Best of the Best honors in CCJ’s 20th annual Best Practices Awards

The COMBINED CYCLE Journal and the steering committees of the industry’s leading users groups—including 7F, 501F, 501G, 7EA, HA, Western Turbine, CCUG, STUG, GUG, PPCUG, Frame 6B, Frame 5, 501D5-D5A, AOG, and V—collaborate to expand the sharing of best practices and lessons learned among owner/operators of large frame and aeroderivative gas turbines. Twenty-eight plants listed

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GTEN 2023 SYMPOSIUM: Realities of hydrogen come under close scrutiny

The 2023 symposium of the Gas Turbine Energy Network (GTEN), held in October 2023 in Banff, Canada, and reviewed earlier in the year (CCJ No. 77, p 96), included many presentations on hydrogen, proposed as a key fuel for a “net-zero world,” when no additional carbon is being discharged to the atmosphere. GTEN focused on

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Lee County improves O&M and safety at eight-unit peaker site

Lee County Generating Station Owned by Rockland Capital Operated by NAES Corp 688 MW, 8 × 0 7EA-powered peaking plant operating on natural gas, located in Lee County, Ill Plant manager: Keith Koziol Protecting operators from falling ice Challenge. Lee County, a peaking plant in northern Illinois, experiences long periods between operations. Calibration cylinders for

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Wärtsilä engines at your plant? Learn from AES Levant’s experience

AES Levant Power Plant Owned by AES Corp, Mitsui, and Neberas Power Operated by AES Levant Holdings BV Jordan 250 MW, tri-fuel peaking facility consisting of 16 Wärtsilä 18V50 diesel/generators located in Al Manakher, Jordan Plant manager: Feras Hammad Protect waste-gate actuator from heat damage Challenge. Function of the waste gate is to control the

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Variety of best practices keeps advanced-class CCGT running strong

Kings Mountain Energy Center Owned by Carolina Power Partners LLC Managed by CAMS Operated by NAES Corp 475 MW, gas-fired 1 × 1 M501GAC-powered combined cycle, located in Kings Mountain, NC Plant manager: Sean Spain Storm shelter protects staff during weather events Challenge. A mid 2020 tornado that touched down within a mile of Kings

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Eliminate generator trips caused by fluctuations in seal-oil temperature

Athens Generating Plant Owned by Kelson Energy Operated by NAES Corp 1080 MW, gas-fired facility equipped with three 501G-powered 1 × 1 combined cycles, located in Athens, NY Plant manager: Steve Cole Challenge. Athens Generating Plant has been plagued with seal-oil issues since first fire more than 20 years ago. Throughout the years, the seal-oil

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