Parameters optimization and simulation of highway tunnel symmetric-luminaire-distribution lighting with LED

In order to acquire the most energy-saving luminaire installation parameters (LIPs) of highway tunnel interior zone, a parameters optimization model (POM) of symmetric luminaire distribution (SLD) lighting for tunnel interior zone was established. It includes luminaire installation height, longitudinal installation spacing, crosswise installation spacing, elevation angle and power as optimization parameters, and with minimum total power of the SLD lighting system as objective function. Yanlieshan tunnel of Jiujing highway was used as an example for the optimization. The optimal LIPs of the SLD lighting system of tunnel interior zone were obtained by the POM. A comparison between the optimization results and that of Yanlieshan tunnel lighting system is performed, which demonstrates that the optimized SLD lighting system with LED lamps installed according to the optimized LIPs has remarkable energy-saving effect even under full capacity lighting condition. Illuminance and illuminance uniformity of the tunnel road surface still meet the traffic lighting requirements. Even the LED lamps’ luminance decreases by 30%. A SLD lighting simulation experiment with the optimized SLD lighting LIPs for Yanlieshan tunnel was carried out by the software Dialux. The simulation results primarily agree with the optimization calculated results from the POM, which proves the correctness of the SLD lighting POM.