.Buildings.ThermalZones.ISO13790.BaseClasses.GlazedElements

Information

This model calculates the heat flow by solar gains through each glazed element k. The heat flow is given by

Φ_sol,k =F_sh,k I_sol,k g_fac (1-F_frame) A_win,k

where F_sh,k is the shading reduction factor which is set to 1 by default, I_sol,k is the solar irradiance per square meter of surface area, g_fac is the total solar energy transmittance of the trasparent element, F_frame is the frame area fraction, and A_win,k is the overall area of the glazed element in square meters.

Additionally, an extra heat flow is modeled to represent the thermal radiation emitted towards the sky as

Φ_r,k =h_r ΔT_sky R_se U_k A_k

where h_r is the external radiative heat transfer coefficient which is approximated as 5 ε W/m²K (where ε is the emissivity for the thermal radiation of the external surface), and ΔT_sky is the average temperature difference between the external air temperature and the apparent sky temperature.

Revisions

• May 15, 2024, by Alessandro Maccarini:
  Added the parameter coeFac in order to vary the g-factor as a function of the incident angle of the surface.
• Mar 16, 2022, by Alessandro Maccarini:
  First implementation.