Paper Title:
Analysis on Thermal Characteristics of Phase Change Roof and Insulation Roof
  Abstract

The two-dimensional unsteady heat transfer models of common roof, insulation roof and phase change roof were established, and the thermal characteristics of common roof, insulation roof and phase change roof with different phase transition temperature were analyzed based on CFD software, the hourly average temperature distribution of their top and bottom surface from initial stage to steady stage and 24-hour hourly average temperature distribution of and average heat flux of bottom surface in steady stage were also attained. The results show that, under air conditioning constant temperature mode, addition of insulation material and phase change material observably improve the heat insulation performance of roof structures, the cooling and energy saving effect of roof more obviously, the attenuation multiple and delay time of roof more obviously, and make the hourly distribution of average temperature and average heat flux of roof bottom surface much gentler. In addition, choosing a phase change material with suitable phase transition temperature according to outside air comprehensive temperature is the key to utilize its latent heat more effectively.

  Info
Periodical
Chapter
Chapter 6: Advanced Construction Materials
Edited by
Xuejun Zhou
Pages
1128-1136
DOI
10.4028/www.scientific.net/AMM.99-100.1128
Citation
G. Z. Wu, Y. Zhao, J. Wang, D. Li, "Analysis on Thermal Characteristics of Phase Change Roof and Insulation Roof", Applied Mechanics and Materials, Vols. 99-100, pp. 1128-1136, 2011
Online since
September 2011
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Price
$32.00
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