Solar Reflectance of Glazed Tiles

Abstract:

Exterior wall tiles with high solar reflectance are effective in mitigating heat-island phenomenon. Such walls have also the potential to decrease the warming up of building interiors in mid-summer. For the purpose of increasing the solar reflectance of wall tiles, several kinds of glazes were prepared to measure their visible and infra-red spectral reflectance by the spectrophotometer. The incident angle of sunlight on vertical exterior wall is larger than 70 degrees at midday of the summer season in Japan. The reflectance theoretically increases with the increase of incident angle. It is important to examine the reflectance against the sunlight with varied incident angles. The practical solar reflectance of glazed tiles is calculated by measuring the hemi-spherical integrated spectral reflectance with an oblique incident light. The glazed tiles having layered structure were also prepared and their spectral reflectance was investigated.

• Periodical: Advances in Science and Technology (Volume 92)
• Pages: 110-114
• DOI: https://doi.org/10.4028/www.scientific.net/AST.92.110
• Online since: October 2014
• Authors: Toyohiko Sugiyama*, Hiroshi Kakiuchida, Keiji Kusumoto, Masayoshi Ohashi
• Keywords: Building Material, Glaze, Reflectance, Solar

References

[1] Japanese Patent, Publication number 2009-143794.

[2] T. Sugiyama, H. Kakiuchida, M. Ohashi, Visible and Infra-red Reflectance of Several Typical Japanese Glazes for Roof Tiles and Wall Tiles, Advances in Sci. and Tech. 68 (2010) 96-101.

DOI: 10.4028/www.scientific.net/ast.68.96

[3] T. Sugiyama, H. Kakiuchida, K. Kusumoto, H. Nagae, M. Ohashi, Solar Reflectance of Glazes for Exterior Wall Tiles, IOP Conf. Series: Materials Science and Engineering, 18 (2011) 222024.

DOI: 10.1088/1757-899x/18/22/222024

[4] H. Kakiuchida, P. Jin and M. Tazawa: Sol. Energy Mater. Sol. Cells, 92(2008), 1279-1284.