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Assessment of the Economic and Environmental Impact of Double Glazed Façade Ventilation Systems in Mediterranean Climates
Center for Industrial Diagnostics and Fluid Dynamics (CDIF), Polytechnic University of Catalonia (UPC), Av. Diagonal, 647 ETSEIB, 08028 Barcelona, Spain
International University of Catalonia, C\Immaculada 22, 08017 Barcelona, Spain
* Author to whom correspondence should be addressed.
Received: 5 June 2013; in revised form: 18 September 2013 / Accepted: 18 September 2013 / Published: 30 September 2013
Abstract: Free convection is the most often used method in order to reduce solar load gains on a building with double glazed façades (DGFs). However, depending on the climate factors, the thermal performance of a DGF may not be satisfactory and extra energy costs are required to obtain suitable comfort conditions inside the building. Forced ventilation systems are a feasible alternative to improve the thermal performance of a DGF in Mediterranean climates where large solar gains are a permanent condition throughout the year. In this paper the feasibility of using diverse forced ventilation methods in DGF is evaluated. In addition, an economical comparison between different mechanical ventilation systems was performed in order to demonstrate the viability of DGF forced ventilation. Moreover, an environmental study was carried out to prove the positive energetic balance on cooling loads between free and forced convection in DGF for Mediterranean climates. For this investigation, a CFD model was used to simulate the thermal conditions in a DGF for the different ventilation systems. Results obtained for heat flux, temperature and reductions in solar load gains were analyzed and applied for the economic and environmental research.
Keywords: double glazed façades (DGF); Coandă nozzle; forced convection; building thermal performance; cooling load savings; environmental impact
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Valentín, D.; Guardo, A.; Egusquiza, E.; Valero, C.; Alavedra, P. Assessment of the Economic and Environmental Impact of Double Glazed Façade Ventilation Systems in Mediterranean Climates. Energies 2013, 6, 5069-5087.
Valentín D, Guardo A, Egusquiza E, Valero C, Alavedra P. Assessment of the Economic and Environmental Impact of Double Glazed Façade Ventilation Systems in Mediterranean Climates. Energies. 2013; 6(10):5069-5087.
Valentín, David; Guardo, Alfredo; Egusquiza, Eduard; Valero, Carme; Alavedra, Pere. 2013. "Assessment of the Economic and Environmental Impact of Double Glazed Façade Ventilation Systems in Mediterranean Climates." Energies 6, no. 10: 5069-5087.