Onsite – Combined Cycle Journal

Much to learn from tight-knit W501G user community

The 501G Users Group only serves owner/operators of Siemens/Westinghouse engines. Users supporting G machines made by Mitsubishi Power are not typically members. This differs from the 501F Users Group, where owner/operators of all 501F engines share experiences. The 501G is a small organization of well-connected engineers and technicians who have “grown up” together—so to speak—and […]

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CPV Valley: Experience upgrading Siemens’ T3000 V9.2

501 F&G Users Group / By Team-CCJ

2024 501F BEST PRACTICES AWARDS: BEST OF THE BEST Anti-icing system prevents snow-related derates, outages The road to reliable ultrafiltration Experience upgrading Siemens’ T3000 V9.2 CPV Valley Energy Center Owned by CPV/Diamond Generating Corp Managed by Competitive Power Ventures Operated by DGC Operations LLC 680 MW, gas-fired 2 × 1 SGT6-5000-powered combined cycle, located in

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CPV Valley: The road to reliable ultrafiltration

501 F&G Users Group / By Team-CCJ

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CPV Valley: Anti-icing system prevents snow-related derates, outages

501 F&G Users Group / By Team-CCJ

CPV Valley: Anti-icing system prevents snow-related derates, outages Read More »

Solution for mitigating the effects of steam leaks in early W501G combustion systems

501 F&G Users Group / By Team-CCJ

2024 501G BEST PRACTICES AWARDS Millennium Generating Plant Owned by Beal Bank Operated by NAES Corp 360 MW, gas-fired 1 × 1 combined cycle equipped with the first Siemens 501G engine to begin commercial operation, located in Charlton, Mass Plant manager: Max Greig Background. The Millennium W501G is equipped with steam-cooled transition pieces which allow

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2024 501G Best Practices: Athens CCGT

501 F&G Users Group / By Team-CCJ

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 Mod eliminates doubts regarding the accuracy of vibration readings Challenge. New Athens Generating has had issues in the past with vibration readings on

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The proven value of a steam-turbine shell warming system

501 F&G Users Group / By Team-CCJ

2024 501F BEST PRACTICES AWARDS Red Oak Power Owned by TigerGenCo Operated by NAES Corp 776 MW, gas-fired 3 × 1 combined cycle equipped with Siemens 501FD engines, Foster Wheeler HRSGs, and a Toshiba triple-pressure reheat steam turbine Plant manager: Dave Carroll Editor’s note: Before reading this Best Practice, consider perusing CCJ’s backgrounder on Arnold

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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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