Małgorzata Górczewska

Reflector shape design using merit function and genetic algorithm

The article presents results of research on the calculation of the shape of a mirror reflector that has not a rotating symmetry. The objective function ensures the highest possible average value of illuminance and uniformity ratio of illuminance. Optimization calculations were carried out for different light source dimensions with the use of merit function. In this paper two strategies that help to get global optimum are compared. First of them is starting ten times from ten different points and find the best solution. The second is using strategy of alteration of population diversity that is executed in one, programmed process.

Comparative study of lighting quality and energy efficiency for various road lighting situations

For road lighting, the main factors directly influencing on the energy performance of lighting, and consequently reducing the consumption of energy, are, among others, the kind of light sources and luminaires and the geometry of positioning of light sources in relation to the road. The article presents a comparative analysis of various lighting solutions for a specific road section, taking into account the energy performance criterion. The evaluation covers various lighting systems with luminaires that use high pressure sodium lamps and LED lamps illuminating roads mainly for medium and high speed motorized traffic.