Application and Experimental Evaluation of Natural Light for Tunnel Illumination
(Hunan Communications Research Institute, Research and Promotion Center of Energy Saving and Emission Reduction Technology for Transportation of Hunan, Changsha 410015)
Abstract��
On account of saving energy and reducing emissions, an innovative lighting proposal is introduced in which natural light is used for illumination at an expressway tunnel entrance. The natural light is brought into the tunnel entrance by a specially designed daylighting band, and the luminance curve of the natural light is modeled and fitted to the current international human visual adaptation curve, thereby eliminating the need for enhanced lighting measures at the entrance. To verify the practicability and reliability of this scheme, the indexes of tunnel lighting like luminance, uniformity of luminance, evolution of luminance, and so on are evaluated by an experimental approach. The results show that the design index of the natural-light illumination scheme meets engineering requirements; compared with the conventional lamp lighting scheme, it basically eliminates the "black-hole effect" at the entrance and enhances tunnel traffic safety and comfort with the added advantages of saving energy and reducing emissions while being simple, useful, and cost-effective.
WANG Bao-Lin,
YE ,
YING etc
.Application and Experimental Evaluation of Natural Light for Tunnel Illumination[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(3): 35-42
2014, Vol. 51 