Heat Transport and Thermal Expansion of Electrochromic Glazing Systems Due to Solar Irradiation

For many technical and architectural applications of electrochromic glazings a thorough understanding of the heat transport and the optical and thermal radiative properties of the system is essential. Furthermore, the thermal expansion and eventually the induced stresses within the laminated system are of iInterest. To meet these demands the solar absorptance of the electrochromic glazings at different tiInted states were measured using an UV–VIS-NIR spectrometer. The thermal expansion coefficients of the glass materials were determined by a push-rod dilatometer. Then the instationary coupled conductive and radiative heat transfer due to solar irradiation were calculated for various pane configurations by finite element analysis. Starting from the resulting instationary temperature fields, the stress and strain states within the laminated glazing system were calculated.