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Fouling thresholds in bare tubes and tubes fitted with inserts

【摘要】 Maya crude oil fouling reveals a straightforward dependency of initial fouling rate on surface temperature but a rather complex dependency on velocity in bare tubes, the initial fouling rate showing a maximum and then decreasing significantly towards zero as the velocity is increased. Surface shear stress clearly is an important parameter. CFD simulation of fluid flow in a tube fitted with a hiTRAN® insert reveals a complex distribution of surface shear stress. To compare the insert situation with the bare tube, an equivalent velocity concept is introduced on the basis that at a given average velocity the fluid flow results in the same average wall shear stress regardless of whether the tube is bare or is fitted with an insert. Using the equivalent velocity concept, the fouling data obtained using both a bare tube and a tube fitted with inserts can be correlated using a single model. Moreover, the fouling threshold conditions below which fouling is negligible, can be predicted for both situations.

【期刊名称】 Applied Energy

【作者】 Mengyan Yang; Barry Crittenden;

【作者单位】 Department of Chemical Engineering, University of Bath, Bath BA2 7AY, United Kingdom; Department of Chemical Engineering, University of Bath, Bath BA2 7AY, United Kingdom;

【收录信息】美国《科学引文索引》(SCI);美国《工程索引》(EI);

【年(卷),期】2012(89),1

【年度】2012

【页码】p.67-73

【总页数】7

【原文格式】PDF

【正文语种】eng

【中图分类】;

【原文服务方】国家工程技术数字图书馆

【关键词】fouling; threshold conditions; crude oil; hiTRAN~® inserts; CFD;

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