scottschwieger – Page 40 – Combined Cycle Journal

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HRSG hot topics: risk-based inspection, corrosion under insulation, water chemistry

The Australasian HRSG Users Group (AHUG) celebrates 11 years of service to the industry at the organization’s 2018 meeting at the Brisbane Conference and Exhibition Center, November 11-13. Review the agenda here. Of all the HRSG groups outside the US, AHUG has the second longest history, behind only IMechE in the UK. The shared purpose […]

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SPECIAL REPORT: Acute levels of uncertainty pervade the industry

We’re supposed to embrace change, but let’s face it, change is unavoidable. It occurs with every passing moment, even if you can’t sense it. So let’s talk about rates of change. In the gas-fired power industry, rates of change may be approaching chaotic effects. That’s the conclusion from 18 one-on-one half-hour interviews conducted over a

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CCUG focuses on key aspects of combined-cycle inspection, operation, and maintenance

The annual Combined Cycle Users Group (CCUG) conference and vendor fair, held in Louisville, Ky, Aug 27-30, 2018, proved once again to be an excellent barometer of what’s on the minds of those charged with making sure gas-fired combined cycles (CCs) start and stop when they are supposed to, make money for their owners, and

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Latest GTs pose special challenges for NOx, CO catalyst system design

The state-of-the-art gas turbines (GTs), such as the H-class and J-class machines, are designed to maximize fuel-to-electricity efficiency, achieving and even exceeding 60% in combined-cycle mode. Already, there are an impressive number of these machines in the field; one supplier listed 80+ H-class GTs operating, in commissioning, being installed, or on order. This achievement is

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7HA users wrestle with emergent issues at inaugural meeting

A CCJ ONsite Special Report Welcome the 7HA Users Group into the pantheon of power-industry organizations seeking peer-to-peer interaction to solve problems expeditiously and provide a collective check on official OEM positions regarding fleet- and plant-level issues. Representatives from well over a dozen facilities and five countries, responsible for 30+ machines, attended the inaugural 7HA

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501F exhaust-system repairs never ending? Replace to eliminate the problem

Exhaust systems are a presentation and/or discussion topic at most gas-turbine user-group meetings, particularly those supporting F-class and the more advanced frames. Cracking of components, broken struts, material distress, and leaks at joints are almost sure to occur in virtually any system handling a 1000 lb/sec or more of turbine exhaust at 1000F or higher

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Attention to detail early in the HRSG lifecycle sets the tone for long-term reliable service

The first five years of HRSG operation are critical for building the foundation necessary to assure a reliable and satisfactory service life, said engineers from HRST Inc participating in an editorial roundtable with CCJ staff. In the early years, they continued, control and organization of supplier documentation will benefit current and future decision-making. Plus, timely

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Factor European experience into O&M practices at US combined cycles, Part II: Aberrant P91 life predictions

At European Technology Development Ltd’s International Conference on Power Plant Operation and Flexibility, held in London in July 2018, ETD’s Dr Ahmed Shibli, the conference organizer, and David Robertson tag-teamed an in-depth presentation on life-prediction concerns for aberrant P91 components often found in electric generating stations worldwide. They are usually the product of not understanding

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HRSG Tip of the Month: November 2018

How best to replace an HP evaporator: Tubes only or entire harp? Editor’s note: Online forums hosted by independent users groups are an invaluable communications medium for sharing experiences among industry colleagues. Power Users, which sponsors user-only discussion forums for the groups it manages—7F, Combined Cycle, Generator, and Steam Turbine—most recently launched an online HRSG

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