Parametric study in office building for daylighting performance and energy saving

Abstract

This paper utilized simulation techniques for identifying the most efficient glazing with a good WWR and a proper daylight autonomy by controlling the thermal heat gain and reducing cooling load as well as energy consumption .daylighting inside space specially offices is one of the most important concerns because of its significance role in energy consumption and its ability to provide a comfort environment inside space for occupants and Productive workers. Utilization of daylight in buildings may result in reduction in electricity consumption for lighting but also in high cooling demand if excessive solar gains are admitted in the working space. Moreover, visual comfort should be ensured especially for perimeter office spaces. Window size and type should be considered as an integral part of fenestration system design for office buildings in order to balance daylighting requirements versus the need to reduce solar gains. performance predictions and simulations can help in identifying strategies for reducing energy consumption and improving building performance by rigorous analysis process and that’s what is this research method,The implementation of the simulation process is carries out by using Rhinoceros 3D modeling which supports DIVA for rhino (a plugin for rhinoceros modeling software) and DIVA uses RADIANCE and DAYSIM and its basic daylight as a simulation engine to space with southern orientation in Alexandria, Egypt. The simulation process performed by using daylight autonomy and thermal analysis. The outcome of this research is as expected choosing the proper glazing type is a huge factor of reducing energy, controlling heat gaine and providing a good thermal comfort . Glazing with less u-value and less visual transmittance are more savers for the energy as a result of less gaining of the heat and less cooling energy. the single pan glazing and the double pan clear glazing are the least energy savers glazing with a higher monthly energy use 379 kwh and 353 kwh in the same order and the higher illuminance in the room, the ElectrochromicGlazings is giving a good illuminance for the space but a high energy use 319 kwh . then the coming three glazing are very similar to each other coming in the first place the Glazing_DoublePane_LowE with 261 kwh and then Glazing_DoublePane_LowE_Argon with 268 kwh and the last is the TripleGlazing_TriplePane_Krypton with 263 kwh with least illuminance between 300 and 3000 lux which is the Useful daylight illuminance range 29.2 % .