INVESTIGADORES
VILLALBA Ayelen Maria
artículos
Título:
Improved model for the thermal performance calculation of non-planar window frames for building simulation programs
Autor/es:
DE GASTINES, MAUREEN; VILLALBA, AYELÉN MARÍA; PATTINI, ANDREA
Revista:
Journal of Building Performance Simulation
Editorial:
Taylor and Francis
Referencias:
Año: 2016
Resumen:
Windows are a key factor for designing energy efficient buildings, particularly the frame area that can produce high thermal bridging. This paper deals with accurately estimating heat transfer through window frames under fluctuating film coefficients. The one-dimensional frame conductance model traditionally used by building simulation programs is analyzed and an alternative model is proposed, which takes into account the non-planar morphology of studied frames. This model shows a positive agreement with the results obtained from a two-dimensional heattransfer simulation program, demonstrating that the thermal performance of highconductance non-planar frames strongly depends on the ratio between the boundary surface area and the projected frame area. According to the results, the traditional conductance model seems to be suitable for all frames with a thermaltransmittance lower than 5 W/m2K; however, frames with a U-factor higher than 6.2 W/m2K need an alternative conductance model that better reflects the 2D nature of frame sections.