In this paper the energy potential of an innovative Double Skin Façade integrating Photovoltaics (DSF-P) for different weather conditions is investigated. The proposed system consists of semi-transparent and opaque PV modules integrated in the exterior skin of the façade and active shading devices implemented within the cavity. The innovative single or multi–story proposed DSF can co-generate solar electricity and thermal energy (for space heating or other building applications). In order to effectively cool down the photovoltaics and increase their electrical efficiency, the buoyancy-driven air flow within the cavity may be assisted by a fan (natural / hybrid ventilation). Active roller blinds are taken into account to regulate heating and cooling loads while controlling the daylight in the corresponding adjacent indoor spaces. With the aim to simulate the system performance, the temperature distribution and the airflow in the DSF, a mathematical model was developed. It is also capable to predict the energy flow, as well as the active and passive effects of the DSF-P on the energy consumption of the adjacent perimeter zones. The simulation model is based on a detailed transient finite difference thermal network, including accurate algorithms for the calculation of the heat transfer phenomena taking place within the DSF-P. The model, also allows performing parametric and sensitivity analyses, useful for pre-feasibility studies at the design phase of new buildings or for retrofit projects implementing the proposed DSF-P. In this paper, in order to determine the values of critical design and operating parameters that minimize the overall energy consumptions, a parametric analysis is carried out. Thus, a case study related to a high-rise office building located in diverse climate zones is presented. Simulation results show the effects due to some crucial DSF-P design and operation parameters on the energy demand of the adjacent zones, and the effectiveness of the proposed system to reach the goal of net zero energy building.
Double skin façades integrating photovoltaics and active shadings: a case study for different climates / Athienitis, A. K.; Buonomano, Annamaria; Ioannidis, Z.; Kapsis, K.; Stathopoulos, T.. - (2017). (Intervento presentato al convegno First International Conference on Building Integrated Renewable Energy Systems tenutosi a Dublin, Ireland nel March 6-9, 2017).
Double skin façades integrating photovoltaics and active shadings: a case study for different climates
BUONOMANO, ANNAMARIA;
2017
Abstract
In this paper the energy potential of an innovative Double Skin Façade integrating Photovoltaics (DSF-P) for different weather conditions is investigated. The proposed system consists of semi-transparent and opaque PV modules integrated in the exterior skin of the façade and active shading devices implemented within the cavity. The innovative single or multi–story proposed DSF can co-generate solar electricity and thermal energy (for space heating or other building applications). In order to effectively cool down the photovoltaics and increase their electrical efficiency, the buoyancy-driven air flow within the cavity may be assisted by a fan (natural / hybrid ventilation). Active roller blinds are taken into account to regulate heating and cooling loads while controlling the daylight in the corresponding adjacent indoor spaces. With the aim to simulate the system performance, the temperature distribution and the airflow in the DSF, a mathematical model was developed. It is also capable to predict the energy flow, as well as the active and passive effects of the DSF-P on the energy consumption of the adjacent perimeter zones. The simulation model is based on a detailed transient finite difference thermal network, including accurate algorithms for the calculation of the heat transfer phenomena taking place within the DSF-P. The model, also allows performing parametric and sensitivity analyses, useful for pre-feasibility studies at the design phase of new buildings or for retrofit projects implementing the proposed DSF-P. In this paper, in order to determine the values of critical design and operating parameters that minimize the overall energy consumptions, a parametric analysis is carried out. Thus, a case study related to a high-rise office building located in diverse climate zones is presented. Simulation results show the effects due to some crucial DSF-P design and operation parameters on the energy demand of the adjacent zones, and the effectiveness of the proposed system to reach the goal of net zero energy building.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
