0
Technical Briefs

Development of a Transparent Heater to Measure Surface Temperature Fluctuations Under Spray Cooling Conditions

[+] Author and Article Information
A. R. Griffin1

Department of Mechanical, Materials and Aerospace Engineering, University of Central Florida, Room 307, Orlando, FL 32816al366353@ucf.edu

A. Vijayakumar, K. B. Sundaram

School of Electrical Engineering and Computer Science, University of Central Florida, Room 307, Orlando, FL 32816

R.-H. Chen, L. C. Chow

Department of Mechanical, Materials and Aerospace Engineering, University of Central Florida, Room 307, Orlando, FL 32816

1

Corresponding author.

J. Heat Transfer 130(11), 114501 (Aug 28, 2008) (4 pages) doi:10.1115/1.2952761 History: Received May 07, 2007; Revised March 24, 2008; Published August 28, 2008

A heater designed to monitor surface temperature fluctuations during pool boiling and spray cooling experiments while the bubbles are simultaneously being observed has been fabricated and tested. The heat source was a transparent indium tin oxide (ITO) layer commercially deposited on a fused quartz substrate. Four copper-nickel thin film thermocouples (TFTCs) on the heater surface measured the surface temperature, while a thin layer of sapphire or synthetic fused silica provided electrical insulation between the TFTCs and the ITO. The TFTCs were microfabricated using the lift-off process to deposit the nickel and copper metal films. The TFTC elements were 50μm wide and overlapped to form a 25×25μm2 junction. A DAQ program recorded the TFTC voltages at a sampling rate of 50kHz and sent a trigger to a high-speed camera to synchronize bubble images with the surface temperature data. As the bubbles and their contact rings grew over the TFTC junction, correlations between bubble behavior and surface temperature changes were demonstrated.

FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Side-view cross section of the heater

Grahic Jump Location
Figure 2

Top-view photograph of the heater (arrows indicate TFTC junctions)

Grahic Jump Location
Figure 3

Diagram of the experiment setup

Grahic Jump Location
Figure 4

Surface temperature and bubble images during one bubble lifetime (arrows indicate TFTC junction)

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