Abstract
Improving the energy efficiency of road lighting is currently one of the most important issues. One of the methods of improving energy efficiency is the use of dimmable luminaires. In order to be able to compare the energy efficiency of different technical solutions, EN 13201-5 introduces energy performance indicators for road lighting installations. The chapter describes energy performance indicators for road installation and the impact of active power losses on these indicators and electricity costs. In order to accurately calculate the above indicators, the active power losses in the elements of the lighting installation should be taken into account. The chapter presents the dependencies which can be used to calculate the active power losses in single- and three-phase systems. In addition, an example of calculation of energy performance indicators, active power and energy losses and electricity costs is provided. The calculation was made for an exemplary installation of road lighting with dimmable luminaires. The analysis was done for single-phase and three-phase installations.
Highlights
Road lighting is one of the basic elements of a road infrastructure
We present the method of calculating active power losses, energy performance indicators and electricity costs in road lighting installations
The power density indicator (PDI) DP determines the amount of energy needed to provide adequate road lighting in accordance with the applicable EN 13201-1 [1] and EN 13201-2 [2] standards
Summary
Road lighting is one of the basic elements of a road infrastructure. Proper lighting of the road ( in conflict zones with an intersection of pedestrian and motor traffic as well as in zones intended for pedestrian traffic, cycling and slowmoving vehicles) is an important element of road safety. The main aim of power reduction is to improve the energy efficiency of road lighting [15–20]. This is equivalent to decreasing the electric energy consumption and CO2 emissions [15]. Power losses in road lighting installations depend, among other things, on the network system (singlephase, three-phase network), the complexity of the network (number of circuits and lighting luminaires) and the used power supply devices. When calculating the electricity consumption during the design phase of a lighting installation, power losses are often omitted. The increasingly common use of dimmable luminaires, especially LED luminaires, in road lighting means that energy consumption and energy losses depend on the lighting time and the level of luminaire power reduction. We present the method of calculating active power losses, energy performance indicators and electricity costs in road lighting installations.
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