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

Abstract

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.

Authors:
; ; ;
Publication Date:
Research Org.:
Drexel Univ., Philadelphia, PA (US)
OSTI Identifier:
20075629
Alternate Identifier(s):
OSTI ID: 20075629
Resource Type:
Journal Article
Journal Name:
Heat Transfer Engineering
Additional Journal Information:
Journal Volume: 21; Journal Issue: 3; Other Information: PBD: May-Jun 2000; Journal ID: ISSN 0145-7632
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; HEAT EXCHANGERS; SCALING; DESCALING; FOULING; SURFACE CLEANING

Citation Formats

Cho, Y.I., Liu, R., McFarland, W.J., and Fusegni, L. Study of scale-removal methods in a double-pipe heat exchanger. United States: N. p., 2000. Web. doi:10.1080/014576300270906.
Cho, Y.I., Liu, R., McFarland, W.J., & Fusegni, L. Study of scale-removal methods in a double-pipe heat exchanger. United States. doi:10.1080/014576300270906.
Cho, Y.I., Liu, R., McFarland, W.J., and Fusegni, L. Thu . "Study of scale-removal methods in a double-pipe heat exchanger". United States. doi:10.1080/014576300270906.
@article{osti_20075629,
title = {Study of scale-removal methods in a double-pipe heat exchanger},
author = {Cho, Y.I. and Liu, R. and McFarland, W.J. and Fusegni, L.},
abstractNote = {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.},
doi = {10.1080/014576300270906},
journal = {Heat Transfer Engineering},
issn = {0145-7632},
number = 3,
volume = 21,
place = {United States},
year = {2000},
month = {6}
}