Heat transfer enhancement of a heat exchanger using novel multiple perforated magnetic turbulators (MPMT): an experimental study
The magnetic turbulator and electromagnetic vibration (EMV) methods have recently been employed to enhance heat transfer in heat exchangers. This method involves placing a magnetic oscillator inside the tube and attaching a magnet with specific dimensions to this oscillator. Creating an AC magneti...
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Main Authors: | , , , , , |
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Format: | Article |
Language: | English English |
Published: |
Elsevier
2024
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Subjects: | |
Online Access: | http://irep.iium.edu.my/107363/1/107363_Heat%20transfer%20enhancement.pdf http://irep.iium.edu.my/107363/2/107363_Heat%20transfer%20enhancement_SCOPUS.pdf http://irep.iium.edu.my/107363/ https://www.sciencedirect.com/science/article/pii/S1290072923005033?via%3Dihub |
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Summary: | The magnetic turbulator and electromagnetic vibration (EMV) methods have recently been employed to enhance
heat transfer in heat exchangers. This method involves placing a magnetic oscillator inside the tube and attaching
a magnet with specific dimensions to this oscillator. Creating an AC magnetic field near the tube causes the
magnet and the oscillator to vibrate, acting as a magnetic turbulator. In this study, multiple perforated magnetic
turbulators were used inside the tube of a heat exchanger for the first time, and their impact on hydrothermal
parameters was assessed. Various factors were examined, including perforation diameter, pitch, and fluid flow
rate. The thermal enhancement factor (TEF) was used to identify the optimal configuration. The results showed
that simple and perforated turbulators increased heat transfer up to 156% and 150%, respectively. However, the
pressure drop in the presence of these turbulators was up to 1.97 and 1.86 times higher than that of a simple heat
exchanger. In addition, the maximum value of TEF was observed in the presence of a perforated magnetic
turbulators with a hole diameter of 2 mm and a hole pitch of 12 mm. This turbulator was the optimal choice,
providing a TEF equivalent to 2.06. |
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