Thank you Jakob for thinking of it again. Actually I think you were partly right too: there is something missing in my balance i.e. radiative heat & internal radiative gains absorbed by the inside surface. So I cannot figure out how to account for this! If you have any further thoughts about it… (I forgot to post on the users list before: I'll reply to all now.) Best -- Antoine Gautier Solamen +33 6 58 24 02 60 antoine.gautier@solamen.fr De : hotline [mailto:hotline@Transsolar.com] Dear Antoine, thinking of it again I have to confess that you were right in the first place – sorry for that… Best Jakob __________________________________________________________________________________________________ Jakob Merk M.Sc. Transsolar Energietechnik GmbH Curiestraße 2 70563 Stuttgart Telefon: +49 711 67976-0 Transsolar: KlimaEngineering- Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäuden Stuttgart – München – New York – Paris Geschäftsführer :Diplom-Ingenieur Matthias Schuler, Diplom-Ingenieur Thomas Auer, Diplom-Physiker Stefan Holst, Diplom-Betriebswirt Dieter Schnelle Eingetragen beim Amtsgericht Stuttgart HRB 23347, Steuernummer: 99073/00911,USt-IdNr.: DE 152272639 Von: Antoine Gautier [mailto:antoine.gautier@solamen.fr] Thanks Jakob! I thought about QABSI (with the analogy to a wall). The problem is from what I understand QABSI includes absorbed solar gain at inside surface: part of it being reemitted inwards so included in QCOMI. Basically for a single pane glazing this part should correspond to QSHFPR so this variable could be subtracted to QCOMI and not counted twice. However for a multiple pane glazing this part should be lower than QSHFPR which also accounts for inwards reemission of absorbed radiation by the outer panes. What if not accounted for in QSTRNS + QCOMI – QSOUT is only radiative heat & internal radiative gains absorbed by the inside surface right? De : hotline [mailto:hotline@Transsolar.com] Dear Antoine, Sounds promising but don’t forget QABSI QSTRNS + QCOMI – QSOUT – QABSI Best __________________________________________________________________________________________________ Jakob Merk M.Sc. Transsolar Energietechnik GmbH Transsolar: KlimaEngineering- Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäuden Stuttgart – München – New York – Paris Geschäftsführer :Diplom-Ingenieur Matthias Schuler, Diplom-Ingenieur Thomas Auer, Diplom-Physiker Stefan Holst, Diplom-Betriebswirt Dieter Schnelle Eingetragen beim 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 am trying to compute the net energy balance from window (glazing + frame, no shading device) to zone using Type 56. My best guess would be: QSTRNS + QCOMI – QSOUT. 1) Does that seem correct to you? 2) Is there a way to further split QCOMI between convective and longwave radiation parts? Thanks a lot for your help -- Antoine Gautier Solamen +33 6 58 24 02 60 |