Light Reflecting Characteristics of Building Materials and Energy Saving of Nightscape Luminance
YANG Chun yu,ZHENG Wen chong and CHEN Shi qun
DOI:10.11835/j.issn.1674-4764.2009.05.017
Received May 09, 2009,Revised , Accepted , Available online July 01, 2015
Volume ,2009,Pages 90-94
- Abstract
In order to realize energy saving of urban nightscape luminance, power consumption was studied with the change of urban luminance. Based on energy consumption indicator(LPD) of 8.9 W/m2, it was calculated that about 0.84W more energy consumption would be for 1 cd/m2 increase of luminance. The effect of 1 to 2 cd/m2 increase was hard to distinguish for human’s visual function under urban nightscape, while the energy consumption was great. Under the same lighting condition, the reflecting characteristics of building surface materials could affect directly the luminance of nightscape. With the study of the reflecting characteristics of different building surface materials, an illumination calculation model for building was proposed based on the formulation of CIE.