Numerical Study on the Heat Transfer, Fouling and Erosion Characteristics of the Elliptical Tube Bundle with Different Extended Heating Surfaces

doi:10.11930/j.issn.1004-9649.201802099

Abstract

Abstract: The erosion and fouling problems are common in low-temperature flue gas heat exchangers, which can cause the increase of the maintenance cost as well as the decrease of the heat transfer coefficient and the instability of equipment operation, etc. In this paper, the reliable computational model and methods are applied to investigate the effect of different extended surfaces of the elliptical tube bundle on the heat transfer, fouling and erosion characteristics. The results show that three kinds of fin elliptical tubes with different extended surfaces have different heat transfer, fouling and erosion characteristics. The H-finned tube bundle has the best heat transfer performance, slightly better than that of double H-finned tube bundle, while the rectangular finned tube bundle is slightly worse than the formers. The H-finned tube bundle has better anti-fouling performance due to the existence of slotted fin, however, the anti-erosion performance of double-H finned tube bundle is slightly better than that of H-finned tube bundle.

Key words: coal-fired unit, flue gas heat exchangers, heat exchange performance, fouling characteristics, erosion characteristics, numerical simulation

CLC Number:

YE Xiafeng, DING Honglei, PAN Weiguo, PAN Yanxing. Numerical Study on the Heat Transfer, Fouling and Erosion Characteristics of the Elliptical Tube Bundle with Different Extended Heating Surfaces[J]. Electric Power, 2018, 51(6): 26-32.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201802099

https://www.electricpower.com.cn/EN/Y2018/V51/I6/26

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