0

Full Content is available to subscribers

Subscribe/Learn More  >

Development of a Negative Thermal Expansion Capsular Object Using Phase Change Material

[+] Author Affiliations
Y. Yamaguchi, K. Takanashi

Tokyo Metropolitan University, Tokyo, Japan

Paper No. HT2003-47224, pp. 687-694; 8 pages
doi:10.1115/HT2003-47224
From:
  • ASME 2003 Heat Transfer Summer Conference
  • Heat Transfer: Volume 1
  • Las Vegas, Nevada, USA, July 21–23, 2003
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3693-2 | eISBN: 0-7918-3679-7
  • Copyright © 2003 by ASME

abstract

Driving device for heat transfer enhancement in a fluid layer heated from above was developed. The device was composed of two closed vessels of which the size differs. They are flexible in axial direction, and the lager vessel is filled with air and the smaller one is filled with phase change material (PCM). By the change of the steam pressure of the PCM, the device shrinks and sinks under water when it is hot, and it expands and floats on water when it is cold. The device has a negative thermal expansion behavior, so the authors named it negative thermal expansion capsular object, NTE capsule for short. In this study, the NTE capsule using phase change material (PCM) was developed. It was composed of the large vessel enclosing the air and small vessel enclosing the PCM. Perfluorocyclobutane (RC318) was used for the PCM. The vapor pressure of the PCM changes widely according to the temperature. The motion characteristics of the NTE capsule using PCM were investigated experimentally. As a result, it was confirmed that the new NTE capsule falls downward and rises upward spontaneously in a fluid layer heated from above.

Copyright © 2003 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

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 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