0

Full Content is available to subscribers

Subscribe/Learn More  >

Performance of an Octacosane Based MicroPCM Fluid in Transitional Flow

[+] Author Affiliations
Richard D. Gould, Willard B. Jackson, III, James C. Mulligan

North Carolina State University, Raleigh, NC

Paper No. IMECE2002-39249, pp. 223-230; 8 pages
doi:10.1115/IMECE2002-39249
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Volume 7
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3638-X | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

Use of microencapsulated phase change material (microPCM) in a single phase carrier of fluid for enhanced cooling has been demonstrated by many researchers for the case of laminar flow. However, very little is known about the behavior of microPCM fluids for turbulent flows. Here we consider the flow of octacosane microPCMs in a 50/50 by volume ethylene glycol/water carrier fluid. This high temperature microPCM fluid, with Tmelt = 60°C, has a much lower viscosity than room temperature microPCM fluids. Room temperature microPCMs in 50/50 by weight ethylene glycol/water carrier fluid generally operate at Reynolds numbers much below the critical value due to their large viscosity and the unreasonably large pumping power required to produce turbulent flow. At 60°C, however, the flow can become transitional and perhaps fully turbulent with moderate pressure rise pumps. This paper presents the performance of an octacosane based microPCM fluid operating in the transitional region at Reynolds numbers up to 2900. Transitional flow convective heat transfer coefficients are shown to be as much as 50% higher than laminar flow values. In addition, surface temperatures are reduced with increasing Reynolds number.

Copyright © 2002 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