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- Third Assistant Engineer (Steam-Motor-Gas Turbine Plants (Unlimited)) »
- Q537 - Steam Plants I
102. Which of the tube types listed can be considered to serve as downcomers at low firing rates, and as generating tubes at high firing rates on some boilers?
Superheater support tubes in some boilers function as downcomers at low firing rates and generating tubes at high firing rates due to their location in a cooler gas path that changes with firing rate, allowing for a shift in hydraulic behavior.
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