Abstract
Contaminants from cool-pigmented roof samples exposed at seven California sites were analyzed for elements and carbons to identify those that degrade or enhance solar reflectance. The losses in solar reflectance varied by site and the color of the sample. The least reflectance drop was observed in the alpine climate, while the largest drop occurred in sites near urban development. The change of reflectance appears cyclical with the onset of seasons having more rainfall. A deposition model suggests that chromium ranks first, iron second, and elemental carbon third in importance to soil light absorption.
| Original language | English |
|---|---|
| Pages (from-to) | 516-526 |
| Number of pages | 11 |
| Journal | Construction and Building Materials |
| Volume | 26 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2012 |
Funding
Funding for this project was provided by the California Energy Commission’s Public Interest Energy Research program through the US Department of Energy under contract DE-AC03-76SF00098. The elemental composition of particles was analyzed by the analytical chemistry services at the DOE Y12 complex using ICP-AES instrument. Oak Ridge National Laboratory is managed by UT-Battelle, LLC, for the U.S. Dept. of Energy under contract DE-AC05-00OR22725.
Keywords
- Absorption
- Aerosol
- Building envelop
- Cool-pigmented roof
- Principal component analysis
- Reflectance
- Soot
