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Dewpoints of flue gases for energy-recovery system design and operation

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  • Lee, Krystal M.
  • Yen-Shiang, Shih

Abstract

Low temperature corrosion from flue gases is a common problem in energy recovery systems. We present a simple computation procedure to estimate the dewpoint of combustion gases, which is the limiting design temperature to prevent corrosion. If the composition of fuel oil and the percentage of CO2 or O2 in the flue gases are known, the air ratio, percentage of H2O, p.p.m. of SO3 in the flue gas, and the dewpoint can be estimated with an error of 1.9%. The results indicate that the dewpoint is high because the combustion conditions are not appropriately adjusted, even if low sulfur fuel oil is used. We conclude that both the fuel quality and the combustion conditions are controlling variables in the design and operation of energy recovery systems.

Suggested Citation

  • Lee, Krystal M. & Yen-Shiang, Shih, 1985. "Dewpoints of flue gases for energy-recovery system design and operation," Energy, Elsevier, vol. 10(7), pages 785-791.
    • Handle: RePEc:eee:energy:v:10:y:1985:i:7:p:785-791
    DOI: 10.1016/0360-5442(85)90112-4
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