Statistical modelling of heat transfer for thermal bridges of buildings

In this paper, we develop statistical models of the thermal transmittance of 2D thermal bridges (ψ). We aim to give building designers plain and practical tools for the evaluation of the most common 2D thermal bridges. Three examples are considered: a slab-on-grade floor-wall junction, a floor-wall junction and a roof-wall junction. For each case, we perform computer simulations of the thermal transmittance, ψ, for several values of the most important variables. Then, we fit these numerical results to a nonlinear regression model. The results appear to be good with relative errors less than 5%.