A sample case of an advanced lighting system in a educational building
The paper describes a case history of an advanced lighting control system designed and realized for a couple of classrooms of the University of Rome. The control is organized by adopting a BUS system with "distributed intelligence" without a central and with smart actuators. The control turns on/off and regulates the lighting output of two classrooms, according to the actual presence of activities and to the actual availability of daylighting. A classroom was arranged with a light solution consisting in “on-off switching” control and not changing the luminaires, a second classroom was arranged with an advanced solution consisting in the replacement of the luminaires with a “dimming” control. A third class identical to the other two was taken as a reference to compare the results, in fact the architecture includes a supervisory system that allows a remote meter of the energetic values for the three classrooms. The paper shows the results of a year of monitoring campaign and compares the results with the energetic evaluation done by the a suggested tool based on the Standard EN15193 methodology.
Procedure to evaluate indoor lighting energy performance
This paper specifies overall indicators to express energy performance of interior lighting systems including luminaires aspects, luminaires arrangements aspects and the impact of the lighting control systems on lighting systems energy performance. Moreover, the authors suggest ways to express energy requirements for the design of new lighting systems or renovation of existing lighting systems, and after that, practical methods to evaluate and to certificate energy performance of luminaires, of control lighting systems and, in general, interior lighting systems according to the reference values fixed.
Investigations of dielectric gratings using electrodynamic models based on volume integral equations
Eigenmodes of planar and cylindrical dielectric gratings (DGs) and electromagnetic wave scattering from multiplayer DGs are investigated. The DG characteristics are calculated using numerical-analytical solution of integral equations (IEs).