The energy performance of the Central Sunlighting System (original) (raw)

This paper presents a simulation study to predict the energy performance of the Central Sunlighting System (CSS) installed in open plan offices. Several simulation tools are combined to conduct the simulations. SkyVision calculates the daylight luminous flux, and lighting and solar heat gains of the CSS. A set of coefficients precalculated using Radiance relates the desktop illuminances to the CSS luminous fluxes. DaySim is used to compute the daylight illuminance from the perimeter windows. ESP-r is used to compute the heating and cooling energy use of the office spaces. The results show that the CSS may save a significant amount of energy in