Numerical investigation of heat transfer and erosion characteristics for H-type finned oval tube with longitudinal vortex generators and dimples

X.B. Zhao, G.H. Tang, Xiao-Wei Ma, Y. Jin and W.Q. Tao

Applied Energy, 2014, vol. 127, issue C, 93-104

Abstract: To improve heat transfer performance and reduce erosion of economizers in coal-fired power plants, firstly the heat transfer and erosion characteristics is numerically studied for the single H-type finned oval tube with enhanced heat transfer structures including bleeding dimples, longitudinal vortex generators (LVGs), and compound dimple-LVG. The simulation results show that the oval tube with compound LVG-dimple achieves the highest overall heat transfer performance while the oval tube with LVG works most efficiently in the anti-wear performance. Then based on the H-type finned oval tube, the LVG structure on the first row of tubes together with hemisphere protrusions design, while the compound LVG-dimple on the rest tubes are also simulated. The optimized H-type finned oval tube bank heat exchanger is demonstrated of high performance on both heat transfer and anti-wear.

Keywords: Heat transfer; Erosion; Longitudinal vortex generators; Dimple (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (14)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:127:y:2014:i:c:p:93-104

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DOI: 10.1016/j.apenergy.2014.04.033

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