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Validation of an electronic anti-fouling technology in a single-tube heat exchanger
Journal article   Peer reviewed

Validation of an electronic anti-fouling technology in a single-tube heat exchanger

Y.i. Cho and Byung-Gap Choi
International journal of heat and mass transfer, v 42(8), pp 1491-1499
1999
DOI: https://doi.org/10.1016/S0017-9310(98)00196-3
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

The objective of the present study was to investigate the validity of an electronic anti-fouling (EAF) technology in the mitigation of precipitation fouling in a once-through flow system with a single-tube heat exchanger. Effects of flow velocity and water hardness on the effectiveness of the EAF technology were experimentally studied. The water hardness varied from 7.5 to 10 mol m −3 as CaCO 3. For both 7.5 and 10 mol m −3 solutions, the EAF treatment reduced fouling resistance by 20–38% at a flow velocity between 0.52 and 0.78 m s −1. As the velocity decreased to 0.28 m s −1, the EAF treatment was not helpful in reducing fouling. SEM photographs of scale produced from the 10 mol m −3 solution at 0.78 m s −1 indicated that calcium carbonate scales without the EAF treatment were needle-shaped aragonite, which is sticky, dense, and difficult to remove. Scales with the EAF treatment showed a cluster of elliptic shape crystals. Both the heat transfer test results and SEM photographs obtained in the present study support the validity of the EAF technology in mitigating precipitation fouling.

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48 citations in Web of Science
57 citations in Scopus

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Web of Science research areas
Engineering, Mechanical
Mechanics
Thermodynamics
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