Paper Title:
A Study on Boiling Heat Transfer Augmentation of Heating Process Using Ultrasonic Vibrations
  Abstract

The present study was experimentally investigated the effect of ultrasonic vibrations on boiling heat transfer augmentation during the heating process. The experiments were carried out under the constant wall temperature condition and were divided into two cases applying with and without ultrasonic vibrations, respectively. Also, the temperature distributions in a vessel filled with water were measured using thermocouples during the heating process, heat transfer coefficient and augmentation ratio of heat transfer on states of convection, subcooled boiling and saturated boiling were calculated from obtained temperature profiles. In addition, the profiles of pressure variations measured using a hydrophone were compared with the augmentation ratio of heat transfer in acoustic fields. The results of experimental study were revealed that general profiles of heat transfer coefficient and augmentation ratio of heat transfer is more increased the convection state than the others states. Moreover, the profiles of acoustic pressure is relatively higher near ultrasonic transducer than other points where is no installed it and affects the augmentation ratio of heat transfer. In the end, as well as known “acoustic streaming” induced by ultrasonic vibrations is one of the prime effects acoustically augmented boiling heat transfer or phase change heat transfer.

  Info
Periodical
Materials Science Forum (Volumes 544-545)
Edited by
Hyungsun Kim, Junichi Hojo and Soo Wohn Lee
Pages
179-182
DOI
10.4028/www.scientific.net/MSF.544-545.179
Citation
H. D. Yang, Y. K. Oh, "A Study on Boiling Heat Transfer Augmentation of Heating Process Using Ultrasonic Vibrations", Materials Science Forum, Vols. 544-545, pp. 179-182, 2007
Online since
May 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Ho Dong Yang, Yool Kwon Oh
Abstract:The present study is investigated the causes of enhanced heat transfer during the melting process of solid-liquid PCM (Phase Change...
1145
Authors: Agus Sunjarianto Pamitran, Ulfi Khabibah, Normah Mohd-Ghazali, Robiah Ahmad, Kiyoshi Saito
Chapter 2: Heat Transfer and Thermal Management
Abstract:Hydrocarbon refrigerants have been widely used to replace HFCs. As hydrocarbon, R-290 has no ODP (Ozone Depletion Potential) and negligible...
181
Authors: Daniel Marcelo, Paul Villar Yacila, Raúl La Madrid Olivares
Chapter 3: Applied Thermodynamics and Heat Transfer
Abstract:In Peru, jaggery making process has low energy efficiency and it is due to low heat transfer coefficients for natural convection linked to...
489