Experimental Study on Energy-saving of Highway Tunnel Lighting with Central Lamp Distribution

At present, most energy-saving studies on tunnel lighting are theoretical or emulational, fewer are experimental studies. Based on optimized tunnel lamp installation parameters, a simulation experiment of tunnel lighting and a tunnel model experiment of lighting were carried out to study the energy-saving of tunnel lighting with low cost. Yanlieshan highway tunnel was selected as object, the optimized central lamp installation parameters (OCLIPs) were obtained with the lighting parameters optimization model (LPOM) on central lamp distribution (CLD) from reference on the basis of tunnel structure sizes (TSS) and selected LED lamps. Simulation experiment of the tunnel lighting was accomplished with DIALux based on the TSS and OCLIPs. A similar tunnel model was designed and built according to the TSS and similarity theory, a lighting experiment was accomplished with the similar tunnel model, and the road-surface-illuminance (RSI) data were obtained and reversely treated, and compared with the simulation experiment results, the statistical results of horizontal RSI of the two ways coincides well, which proves the correctness of the LPOM, the feasibility of the lighting experimental study with tunnel model and validity of the experiment method. Keywords—highway tunnel lighting; energy-saving; experimental study; central lamp distribution