Thermal Models for Box Type Windows: Part 2

  • Dániel Bakonyi Department of Building Constructions, Faculty of Architecture, Budapest University of Technology and Economics, Hungary
  • Gergely Dobszay Department of Building Constructions, Faculty of Architecture, Budapest University of Technology and Economics, Hungary

Abstract

As the literature does not contain enough measurement data to create dedicated correlations for the Nusselt number and convective heat transfer inside box type windows, CFD simulations are performed to study the type of natural convection in such windows. Validation is attempted with the help of the turbulence benchmark of Betts and Bokhari (2000) and comparison with other simulations found in the literature. The k-ω SST model of Menter (1994) is selected to perform a wide range study of the cavity aspect ratios and Rayleigh numbers expected in box windows, enabling an analysis of the types of convections encountered. A new correlation is introduced to calculate the convective heat transfer, and finally, the study is augmented to investigate the effects the temperature stratification has on critical glazing surface temperatures.

Keywords: historical double skin window, box type window, heat loss calculation, convection in glazing cavity, natural convection
Published online
2017-01-20
How to Cite
Bakonyi, D. and Dobszay, G. (2016) “Thermal Models for Box Type Windows: Part 2”, Periodica Polytechnica Architecture, 47(2), pp. 57-69. https://doi.org/10.3311/PPar.9478.
Section
Articles