A numerical study of air preheater leakage

Avinash Maharaj, Walter Schmitz and Reshendren Naidoo

Energy, 2015, vol. 92, issue P1, 87-99

Abstract: The purpose of the research is to quantify direct leakage for a Ljungström air preheater. The leak flow path was assumed to be similar to flow through an orifice and a theoretical approach was used to calculate leakage. A 2D CFD model with a geometry similar to the one considered in the theoretical approach was also developed to calculate leakage. It was noted that for the different leak gaps investigated, the theoretical calculated leakage was always lower than the CFD calculated leakage. This can be attributed to the fact that the leak gap geometry and actual orifice flow geometry are not identical. Using the 2D CFD model, the leak flow was quantified for various seal settings across the operating air temperature range.

Keywords: Ljungström air preheater; Direct leakage; Orifice (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:92:y:2015:i:p1:p:87-99

DOI: 10.1016/j.energy.2015.06.069

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