Building Retrofitting through Coupling of Building Energy Simulation-Optimization Tool with CFD and Daylight Programs

Building Retrofitting through Coupling of Building Energy Simulation-Optimization Tool with CFD and Daylight Programs

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Simultaneous satisfaction of both thermal and visual comfort in buildings may be a challenging task.Therefore, this paper suggests a comprehensive framework for the building energy optimization process integrating computational fluid dynamics (CFD) daylight simulations.A building energy simulation tool, IDA Indoor Climate and Energy (IDA-ICE), was coupled with three open-source turbo air m3f24-1-n tools including GenOpt, OpenFOAM, and Radiance.In the optimization phase, several design variables i.

e., building envelope properties, fenestration parameters, and Heating, Ventilation and Air-Conditioning (HVAC) system set points, were selected to minimize the total building energy use and simultaneously improve thermal and visual comfort.Two different scenarios were investigated for retrofitting of a generic office building located in Oslo, Norway.In the first scenario a constant air volume (CAV) ventilation system with a local radiator in each zone was used, while an all-air system equipped with a demand control ventilation (DCV) was applied in the second scenario.

Findings showed that, compared to the reference design, significant reduction of total building energy use, around 77% and 79% in the first and second scenarios, was achieved respectively, and thermal and visual comfort conditions were also improved considerably.However, the overall thermal and visual comfort satisfactions were revlon colorstay lip liner plum higher when all-air system was applied.