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Tetra Engineering will be presenting our technical paper on "Impact of Startup Purge Credit on Combined Cycle Plant Operation" at the ASME Power and Energy Conversion 2015 Conference in San Diego, California, USA on June 30, 2015. It describes the technical basis for purge credit operation and provides an example of the impact on fatigue lifetime in key Heat Recovery Steam Generator components.
How low can you go? That’s the question owners of gas turbine combined cycle plants are asking these days as they are being called upon to operate those units for rapid response in markets where load following is becoming the norm. The resulting cyclic operation introduces challenges that can result in damage to steam cycle components if you aren’t careful.
OEM upgrade packages to gas turbines (GT) can significantly improve performance, operational flexibility and increase outage intervals. In combined cycle power plants, the impact of these upgrades should also be considered for the HRSG where the design was based on the original GT performance.
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