首页|Parametric optimization of multifunctional integrated climate-responsive opaque and ventilated fa?ades using CFD simulations
Parametric optimization of multifunctional integrated climate-responsive opaque and ventilated fa?ades using CFD simulations
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NSTL
Elsevier
The design and application of dynamic fa?ades have gained attention in recent years as new high-performance building fa?ade alternatives. In this study, the optimization of a novel opaque dynamic fa?ade, the MICRO-V (Multifunctional Integrated Climate-responsive Opaque and Ventilated) fa?ade, is investigated. This fa?ade is comprised of different components to regulate the flow of heat, air, and moisture into buildings dynamically with daily and seasonal responses using an integrated ventilation module, phase change materials (PCM), and an adjustable insulation system. This fa?ade acts as a decentralized ventilation system, in which the fresh air is pre-conditioned using the thermal energy storage provided by the PCMs, and the heat recovery inside the ventilation module. The aim of this paper is to optimize the conceptual fa?ade design using parametric simulations by quantifying the performance of the MICRO-V facade. Multiple parameters, among which the geometry, the material properties, and the airspeed were tested. CFD simulations were performed in both the heating and the cooling seasons in a continental climate (Toronto, Canada). The pre-conditioning efficiency of fresh air in the fa?ade was 73% in the summer week and 65% in the winter week. Including the PCMs to condition the air resulted in an average increase of air temperature in the winter by 3 °C, through solar gain storage, and helped to reduce the extreme temperature by 5 °C on extremely hot summer periods. The study showed the thermal resistance in the fa?ade could be increased and decreased as a function of airflow in the fa?ade, which is a potential way to control the overall heat gain and heat loss through the fa?ade annually. The fa?ade-scale simulations showed the necessity of this type of analysis prior to whole-building simulations to accurately represent the fa?ade's performance.
NSTL
Elsevier
