Energy Saving at Modernization of Street Lighting

The article is devoted to the practical energy saving at modernization of street lighting in small towns. The object of the research is street lighting. The subject of the research is replacing the lamp type and power. The paper deals with the current situation of street lighting on the basis of the existing RKU (mercury console street) type with DRL (arc mercury) 250W lamps. The modern software products allowed to hold computer modeling of street lighting and calculation of standardized parameters for the option of using ZhKU (sodium console) lighting with DNat (high-pressure sodium) 150W lamps. There has been made a lighting calculation of a road section with the existing RKU-250 lamps and a comparative lighting calculation with ZhKU-150 lamps. There is a graphic performance of 2D and 3D lighting models of the test road section. The normative GOST value of the average luminance is demonstrated. There has been made a calculation of basic lighting parameters (average brightness, average luminance, maximum luminance, minimum luminance). There is information about financial cost of street lighting modernization. There has been calculated the annual economic impact of replacing DRL 250W lamps with DNat 150W lamps. There has been made a calculation of the payback period of the project. The energy-saving effect has been received. The further introduction of replacement of DRL 250W lamps with DNat 150W lamps has been recommended.