Influence of the apex angle of cone shaped tubes on particulate fouling of heat exchangers

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Abstract

A two-dimensional (2D) cone shape has been added to the normal circular tubes of heat exchangers to minimize the area of stagnation and to streamline the air flow around the heat exchanger tubes. An experimental setup has been developed to study the influence of the apex angle of the cone-shaped tubes on particulate fouling of heat exchangers. Fouling experiments have been performed in which calcium carbonate particles are injected during the experiments and the deposition of particles on the tubes of the heat exchanger is monitored. Four sets of experiments have been performed, in which normal cylindrical tubes and coned tubes with an apex angle of 60°, 90°, and 120° are examined. It was found that particulate fouling ceased if the apex angle of the cone-shaped tubes is smaller than 90°. The attached cones enhance the flow around the tubes of the heat exchanger, by minimizing the stagnation area and keeping the flow attached to the tubes starting from the tip of the attached cone until separation, such that particles that deposit on the top of the tubes of the heat exchanger can be removed by the air flow.
Original languageEnglish
Pages (from-to)272-281
JournalHeat Transfer Engineering
Volume32
Issue number3 & 4
DOIs
Publication statusPublished - 2011

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fouling
heat exchangers
Fouling
particulates
Heat exchangers
Cones
cones
apexes
tubes
air flow
Calcium Carbonate
Tubes (components)
Experiments
Calcium carbonate
Air
tube heat exchangers
circular tubes
Deposits
calcium carbonates
deposits

Cite this

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title = "Influence of the apex angle of cone shaped tubes on particulate fouling of heat exchangers",
abstract = "A two-dimensional (2D) cone shape has been added to the normal circular tubes of heat exchangers to minimize the area of stagnation and to streamline the air flow around the heat exchanger tubes. An experimental setup has been developed to study the influence of the apex angle of the cone-shaped tubes on particulate fouling of heat exchangers. Fouling experiments have been performed in which calcium carbonate particles are injected during the experiments and the deposition of particles on the tubes of the heat exchanger is monitored. Four sets of experiments have been performed, in which normal cylindrical tubes and coned tubes with an apex angle of 60°, 90°, and 120° are examined. It was found that particulate fouling ceased if the apex angle of the cone-shaped tubes is smaller than 90°. The attached cones enhance the flow around the tubes of the heat exchanger, by minimizing the stagnation area and keeping the flow attached to the tubes starting from the tip of the attached cone until separation, such that particles that deposit on the top of the tubes of the heat exchanger can be removed by the air flow.",
author = "M.S. Abd-Elhady and C.C.M. Rindt and {Steenhoven, van}, A.A.",
year = "2011",
doi = "10.1080/01457632.2010.495622",
language = "English",
volume = "32",
pages = "272--281",
journal = "Heat Transfer Engineering",
issn = "0145-7632",
publisher = "Taylor and Francis Ltd.",
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Influence of the apex angle of cone shaped tubes on particulate fouling of heat exchangers. / Abd-Elhady, M.S.; Rindt, C.C.M.; Steenhoven, van, A.A.

In: Heat Transfer Engineering, Vol. 32, No. 3 & 4, 2011, p. 272-281.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Influence of the apex angle of cone shaped tubes on particulate fouling of heat exchangers

AU - Abd-Elhady, M.S.

AU - Rindt, C.C.M.

AU - Steenhoven, van, A.A.

PY - 2011

Y1 - 2011

N2 - A two-dimensional (2D) cone shape has been added to the normal circular tubes of heat exchangers to minimize the area of stagnation and to streamline the air flow around the heat exchanger tubes. An experimental setup has been developed to study the influence of the apex angle of the cone-shaped tubes on particulate fouling of heat exchangers. Fouling experiments have been performed in which calcium carbonate particles are injected during the experiments and the deposition of particles on the tubes of the heat exchanger is monitored. Four sets of experiments have been performed, in which normal cylindrical tubes and coned tubes with an apex angle of 60°, 90°, and 120° are examined. It was found that particulate fouling ceased if the apex angle of the cone-shaped tubes is smaller than 90°. The attached cones enhance the flow around the tubes of the heat exchanger, by minimizing the stagnation area and keeping the flow attached to the tubes starting from the tip of the attached cone until separation, such that particles that deposit on the top of the tubes of the heat exchanger can be removed by the air flow.

AB - A two-dimensional (2D) cone shape has been added to the normal circular tubes of heat exchangers to minimize the area of stagnation and to streamline the air flow around the heat exchanger tubes. An experimental setup has been developed to study the influence of the apex angle of the cone-shaped tubes on particulate fouling of heat exchangers. Fouling experiments have been performed in which calcium carbonate particles are injected during the experiments and the deposition of particles on the tubes of the heat exchanger is monitored. Four sets of experiments have been performed, in which normal cylindrical tubes and coned tubes with an apex angle of 60°, 90°, and 120° are examined. It was found that particulate fouling ceased if the apex angle of the cone-shaped tubes is smaller than 90°. The attached cones enhance the flow around the tubes of the heat exchanger, by minimizing the stagnation area and keeping the flow attached to the tubes starting from the tip of the attached cone until separation, such that particles that deposit on the top of the tubes of the heat exchanger can be removed by the air flow.

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JO - Heat Transfer Engineering

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SN - 0145-7632

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