0
Research Papers: Porous Media

Effect of Loss of Blowing Agents on Thermal Insulation Properties of Polystyrene Foams

[+] Author and Article Information
Zhenjin Zhu

Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canadazjzhu@mie.utoronto.ca

Jin Ho Zong

Department of Materials, Mechanical & Automation Engineering, Yanbian University of Science & Technology, Yanji, Jilin, P. R. China 133000zongyust@gmail.com

Chul B. Park1

Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canadapark@mie.utoronto.ca

Manoj Choudhary

 Owens Corning, 2790 Columbus Road, Route 16, Granville, OH 43023manoj.choudhary@owenscorning.com

1

Corresponding author.

J. Heat Transfer 131(5), 052603 (Mar 19, 2009) (8 pages) doi:10.1115/1.3013830 History: Received February 08, 2008; Revised September 22, 2008; Published March 19, 2009

This paper presents a numerical study to characterize the effect of loss of blowing agents on the thermal insulation properties of polystyrene foams. In this study, a transient cell-to-cell diffusion model is developed to predict the loss of the blowing agents. The Mie theory is used to quantify the radiative conductivity. A cubic-series-parallel approach in analogy with electric circuits is employed to acquire the thermal conductivity of the gas-polymer matrix. The effects of foam morphology and blowing agent type on the loss of blowing agents and the resulting thermal insulation properties of polystyrene foams are examined.

Copyright © 2009 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Plateau borders and cell walls. (a) SEM picture and (b) a pentagonal, dodecahedral cell.

Grahic Jump Location
Figure 2

Thermal resistance of a unit cell using a cubic-series-parallel approach

Grahic Jump Location
Figure 3

Cell-to-cell diffusion model

Grahic Jump Location
Figure 4

Concentration profile of blowing agent within a cell-wall

Grahic Jump Location
Figure 5

Verification in theoretical modeling

Grahic Jump Location
Figure 6

Effect of cell size on radiative conductivity

Grahic Jump Location
Figure 7

Effect of border diameter on radiative conductivity

Grahic Jump Location
Figure 8

Effect of cell density on radiative conductivity

Grahic Jump Location
Figure 9

Effect of foam density on radiative conductivity

Grahic Jump Location
Figure 10

Concentration profiles of HFC134a in 1in. PS foam

Grahic Jump Location
Figure 11

Variation in gaseous conductivity

Grahic Jump Location
Figure 12

The decay of HFC134a, HCFC142b, and HFC152a in PS foam

Grahic Jump Location
Figure 13

Effect of volume expansion ratio on the decay of HFC134a

Grahic Jump Location
Figure 14

Effect of blowing agent type on thermal insulation capacity

Grahic Jump Location
Figure 15

Effect of cell density on thermal insulation capacity

Grahic Jump Location
Figure 16

Effect of volume expansion ratio on thermal conductivity capacity

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