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Modeling of a ventilated PV double-skin façade.

Number: pap. 1096

Author(s) : SAADON S., GAILLARD L., GIROUX S., et al.

Summary

Building envelope is underexploited and must move towards active functions in term of energy production. In urban areas, roof surfaces are very limited compared to the façade. Therefore the roof surfaces should be valued at the maximum and facades integrate solar components even if the orientation is not optimal. In this context a lot of researches are led on the development of multi-functional building envelope components. This work focuses on components of envelope of type double-skin photovoltaic ventilated and the operating principle is, in summer, promoting natural convection flows within the cavity and in winter to enhance the potential recoverable thermal energy (mechanical ventilation) for the purpose of buildings. Preheating of the ventilation air within the façade is through incident solar radiation heating of the PV elements and subsequent heat transmission to the air within the ventilation gap. This paper presents the modeling that have been made for such a photovoltaic double-skin system and what have to be take into account (mass flow rate, wind coefficient, semitransparent degree of the façade) in order to improve the modeling. However, the modeling of the implied physical mechanisms which are controlling the kinematic and thermal behavior of natural convection flows in these type of components still remain complex as well as taking into account the interdependence between the photo conversion and the thermal operating conditions of the PV cells.

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Pages: 11 p.

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Details

  • Original title: Modeling of a ventilated PV double-skin façade.
  • Record ID : 30010652
  • Languages: English
  • Subject: Environment
  • Source: Clima 2013. 11th REHVA World Congress and 8th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings.
  • Publication date: 2013/06/16

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