Thanks for your answer. I must confess I am not aware of all the capabilities of the complex glazing model. Would you have a detailed documentation to share? Especially does the model enables the computation of air flowrate inside the cavity based on the discharge coefficients of the lower and upper vents and a control signal? I guess the massive wall would not be part of the glazing system so how would you figure out the coupling between the wall and the glazing? Best -- Antoine Gautier Solamen +33 6 58 24 02 60 antoine.gautier@solamen.fr De : Marion Hiller [mailto:Hiller@Transsolar.com] Dear Antoine, I’m back from vacation and claening my emails. My feeling is that the complex glazing model available for Trnsys 18 could be used for modelling a trombe wall. Did you consider this option? Marion ----------------------------------------------------------------------------------------------------------------------------------------------------------- Dipl.-Ing. Marion Hiller t: +49.711.67976.0 f: +49.711.67976.11 www.transsolar.com/ Amtsgericht Stuttgart - HRB 23347 / Steuernummer: 99073/00911 / USt-IdNr.: DE 152272639 Von: TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org] Im Auftrag von Antoine Gautier via TRNSYS-users Hi I use Type36 in Mode 2 (air flowrate computed internally, glazing transmittance as an input) to model a naturally vented Trombe wall. I use the multi-layer detailed window model from Type56 to compute the solar transmittance B3_QSTRNS/B3_QSEXT and U-value UWIN of the window (at each time step). Looking at the source code of Type36 I cannot figure out how the model accounts for the inward-flowing portion of the solar radiation absorbed by the window. Therefore I would rather provide SHGC (B3_QSTRNS+B3_QSHFPR)/B3_QSEXT instead of solar transmittance as an input to Type36. The drawback being all this inward-flowing portion considered as radiation absorbed by the massive wall. However the uncertainty (assuming all inward-flowing portion is radiative) seems lower than totally neglecting the inward-flowing portion. Would somebody have a recommendation to share? Best -- Antoine Gautier Solamen +33 6 58 24 02 60 |