Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by_________________?
Correct answer: D. Radiation
- A. Conduction
- B. Convection
- C. Both A. & B.
- D. Radiation
Explanation
In a high-pressure boiler furnace, the flame and hot combustion gases transfer most of their energy to the water-wall tubes by radiation. Convection becomes more important in later boiler sections such as superheaters and economizers.
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