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Strategies for Inspecting HRSGs in Two-Shift and Low-Load Service

Strategies for Inspecting HRSGs in Two-Shift and Low-Load Service

Inspections of more than 500 units over the past 10 years reveals common challenges faced by mid-life HRSGs, particularly those used in combined cycle plants to offset renewable generation and other aggressive operating strategies.

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We are hiring

We are hiring

We are looking to hire candidates at different experience levels to be based at our European office, which is in the Sophia-Antipolis technology park about 20 minutes west of Nice, France.

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Fall 2019 Course Offerings  - Middle East

Fall 2019 Course Offerings - Middle East

Join us in either Dubai or Karachi this fall for HRSG & Waste Heat Boiler training!

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NFPA 85 HRSG Purge Credit Options, Benefits & ROI - Feb 2019  501F

NFPA 85 HRSG Purge Credit Options, Benefits & ROI - Feb 2019 501F

Peter Jackson, President of Tetra Engineering Group was invited to present Tetra's experience on Purge Credit implementations at the 501F User Conference this February (2019).Combined cycle power plants use fuels and other materials that can cause fires or explosions in the combustion turbine, ducting, or heat recovery steam generator. Purging that equipment with ambient air to displace residual combustible gases before starting is a normal safety practice. But when plants are cycled, the disadvantages of purging often outweigh the advantages.

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T23 Tube Failure

T23 Tube Failure

During the startup of the triple-pressure HRSGs, plant staff noticed steam coming from the stack and a discrepancy between feedwater and steam flows. On shutting down the unit a T23 superheater tube was found with a complete circumferential failure. The failed tube was removed and the bore was plugged with some difficulty due to poor access and the uncommon material.

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HRSG Condition Assessments Identify CAPEX, Maintenance Priorities

HRSG Condition Assessments Identify CAPEX, Maintenance Priorities

As combined cycle gas turbine plants are called upon to play a larger and more flexible role in the generation mix, it’s important to schedule a comprehensive assessment of major components at key intervals to ensure reliable operation.

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Role of Boiling Mode and Rate in Formation of Waterside Deposits in Heat Recovery Steam Generator Evaporator Tubes

Role of Boiling Mode and Rate in Formation of Waterside Deposits in Heat Recovery Steam Generator Evaporator Tubes

Waterside Deposits in evaporator tubes have been an issue in steam generators as long as boilers have been used. Substantial experience in deposit formation and management has been gained in conventional goal and oil/gas boilers over time. The role of boiling modes in the steam generator tubes is very critical to areas of deposit formation.

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Impact of Startup Purge Credit on Combined Cycle Plant Operation

Impact of Startup Purge Credit on Combined Cycle Plant Operation

Normal boiler and Heat Recovery Steam Generator Operation have required a complete purge of the boiler by fresh air before startup firing to remove potentially explosive fuels and other substances from the boiler/HRSG. For power plants in daily two-shift cycling (or more frequent starts) this not only adds time to the startup sequence but can impose significant thermal stresses on hot components exposed to cooler purge air.

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Power Plant Simulator & Designer Package (PPSD) Version 19.1.

Power Plant Simulator & Designer Package (PPSD) Version 19.1.

Tetra Engineering and KED are pleased to announce the release of the Power Plant Simulator & Designer Package (PPSD) Version 19.1. PPSD is a state of the art design and analysis/troubleshooting package for nearly any type of thermal power plant. It includes the capability for both steady state and dynamic simulation and analysis and is developed by KED in Germany.

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