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Study of scale-removal methods in a double-pipe heat exchanger
Journal article   Peer reviewed

Study of scale-removal methods in a double-pipe heat exchanger

Y I Cho, R Liu, W J McFarland, L Fusegni and Drexel Univ., Philadelphia, PA (US)
Heat transfer engineering, v 21(3), pp 50-57
01 May 2000
DOI: https://doi.org/10.1080/014576300270906
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

Engineering Engineering, Mechanical Mechanics Physical Sciences Science & Technology Technology Thermodynamics
The objective of the present study was to examine the effectiveness of four cleaning methods for the removal of tube-side fouling in a double-pipe heat exchanger. The four cleaning methods are (1) hydrolazing with 10,000-psi head pressure. (2) hydrolazing with 20,000-psi head pressure, (3) chemical cleaning, and (4) brush punching. Fouled tubes were prepared using water from a cooling tower. Each test started with a brand new tube. When the overall heat transfer coefficient dropped by 40% from the initial peak value, scales in the fouled tubes were removed using one of the above four methods. Both the overall heat transfer coefficient and inside diameter were measured before and after fouling, by which the effectiveness of a particular cleaning method was evaluated. The chemical cleaning method was found to be most effective, whereas the brush punching was least effective. When a fouled tube was kept dry, brush punching completely removed scales, indicating that surface wetness plays an important role in scale removal.

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6 Record Views
6 citations in Web of Science
8 citations in Scopus

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Web of Science research areas
Engineering, Mechanical
Mechanics
Thermodynamics
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