0
Research Papers

Ultrasonic Effect on Heat Transfer Performance of Oscillating Heat Pipes

[+] Author and Article Information
Nannan Zhao, Benwei Fu, Fengmin Su

Institute of Marine Engineering
and Thermal Science,
Marine Engineering College,
Dalian Maritime University,
Dalian 116026, China

Hongbin Ma

LaPierre Professor
Fellow ASME
Department of Mechanical
and Aerospace Engineering,
University of Missouri,
Columbia, MO 65211
e-mail: mah@missouri.edu

1Corresponding author.

Manuscript received April 27, 2014; final manuscript received August 9, 2014; published online May 14, 2015. Assoc. Editor: Yogesh Jaluria.

J. Heat Transfer 137(9), 091014 (Sep 01, 2015) (6 pages) Paper No: HT-14-1246; doi: 10.1115/1.4030227 History: Received April 27, 2014; Revised August 09, 2014; Online May 14, 2015

The ultrasonic effect on the heat transfer performance in oscillating heat pipes (OHPs) was investigated experimentally. Ultrasonic sound was applied to the evaporating section of the OHP by using electrically controlled piezoelectric ceramics. The heat pipes were tested with or without the ultrasonic effect. The effects of heat input, filling ratio, orientation, operating temperature, and working fluids (water and acetone) were investigated. The experimental results showed that ultrasonic sound can affect the oscillating motions and enhance the heat transfer performance of an OHP. However, the heat transfer enhancement mainly occurs at low heat input. In addition, it was found that heat transfer enhancement of the ultrasonic effect depends on the working fluid and operating temperature. At an operating temperature of 20 °C, the enhancement percentage of the water OHP is higher than acetone OHP. However, when the operating temperature was increased to 40 °C, the enhancement percentage of the water OHP was lower than the acetone OHP.

FIGURES IN THIS ARTICLE
<>
Copyright © 2015 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Schematic of the OHP with locations of the PZTs (dimension unit: mm)

Grahic Jump Location
Fig. 2

Schematic of the experimental system

Grahic Jump Location
Fig. 3

Thermal resistance of the acetone OHP with and without the ultrasonic effect (filling ratio: 50%; operating temperature: 40 °C; and orientation: 90 deg)

Grahic Jump Location
Fig. 4

Enhancement percentage of the acetone OHP with the ultrasonic effect (filling ratio: 50%; operating temperature: 40 °C; and orientation: 90 deg)

Grahic Jump Location
Fig. 5

Thermal resistance of the acetone OHP with and without the ultrasonic effect (filling ratio: 50%; operating temperature: 40 °C; and orientation: 0 deg)

Grahic Jump Location
Fig. 6

Enhancement percentage of the acetone OHP with the ultrasonic effect (filling ratio: 50%; operating temperature: 40 °C; and orientation: 0 deg)

Grahic Jump Location
Fig. 7

Thermal resistance of the acetone OHP with and without the ultrasonic effect under different operating temperature (filling ratio: 50%; orientation: 90 deg)

Grahic Jump Location
Fig. 8

Mean thermal resistance of the acetone OHP with and without the ultrasonic effect (heat load: less than 50 W; filling ratio: 50%; and orientation: 90 deg)

Grahic Jump Location
Fig. 9

Mean thermal resistance of the acetone OHP with and without the ultrasonic effect (heat load: more than 50 W; filling ratio: 50%; and orientation: 90 deg)

Grahic Jump Location
Fig. 10

Thermal resistance of the acetone OHP with and without the ultrasonic effect of different filling ratios (operating temperature: 60 °C; orientation: 90 deg)

Grahic Jump Location
Fig. 11

Thermal resistance of the water and acetone OHP with and without the ultrasonic effect (filling ratio: 50%; operating temperature: 20 °C; and orientation: 90 deg)

Grahic Jump Location
Fig. 12

Thermal resistance of the water and acetone OHP with and without the ultrasonic effect (filling ratio: 50%; operating temperature: 40 °C; and orientation: 90 deg)

Grahic Jump Location
Fig. 13

Enhancement percentage of the water and acetone OHP with and without the ultrasonic effect (filling ratio: 50%; operating temperature: 20 °C; and orientation: 90 deg)

Grahic Jump Location
Fig. 14

Enhancement percentage of the water and acetone OHP with and without the ultrasonic effect (filling ratio: 50%; operating temperature: 40 °C; and orientation: 90 deg)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In