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Energy Benefits of Porosity Distributions
Name: Energy Benefits of Porosity Distributions
File: Haselbach Presentation Final 5-8-12.pdf
Size(MB): 2.37MB
Extension: PDF
Event: 2012 ICSC - SEATTLE
Speaker Name: Haselbach, L.
Managed by: sdickens
Date Uploaded: June 6, 2012; 7:57 am
Download Count: 690
Downloads This Month: 690

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The heat island effect is a phenomenon where temperatures in developed areas are higher than those of more rural areas due to solar energy retained in materials such as pavements. A high solar reflectance index (SRI) is one parameter used to evaluate pavements which contribute less to this phenomenon. Pervious concrete has other characteristics such as insulating capabilities due to its porous structure that help mitigate the heat island effect. These characteristics are now recognized in the International Green Construction Code (IgCC) as contributing to heat island mitigation making pervious concrete exempt from SRI testing in this green code. In order to more effectively design pervious concrete systems to manage both stormwater and heat island impacts, it is important to understand heat transfer through its porous structure. Transient finite element analyses (FEA) based on data from a test placement in Greenville, SC were used to estimate thermal conductivity variations within a pervious concrete layer. Models using average thermal properties distributed for three and ten vertical sections within a pervious concrete layer were found to correlate well with top and bottom temperatures experienced in the field. These models which considered its typical vertical porosity distribution differed significantly from a model that did not.

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