Potencial de economia de energia elétrica através do uso da luz natural e da ventilação híbrida em edifícios comerciais em Florianópolis

The aim of this study is to estimate the electricity savings potential by using daylighting integrated with artificial lighting systems and hybrid ventilation in commercial buildings located in Florianopolis, Brazil. This research work was based on computer simulations using EnergyPlus and Daysim programmes. Commercial building models with three geometries, three room sizes per geometry, four orientations and ten window areas per model were simulated. The models were examined in four case studies. In Case 1 (reference) the building operates with artificial lighting and air-conditioning systems. Case 2 presents the integration of daylight and artificial light with air-conditioning. In Case 3 hybrid ventilation and artificial lighting were used. In Case 4, the integration of daylight and artificial light with hybrid ventilation was used. The electricity consumption in Case 1 were compared with those in the other cases. Hence, the potential for electricity savings by using daylighting and hybrid ventilation was estimated. The main conclusion was that the use of daylighting and hybrid ventilation in commercial buildings located in Florianopolis presents a potential of up to 64.9% savings in electricity and such strategies can be used to improve energy efficiency in this type of buildings.

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