Dear Marion, David, Christoph Thank you very much for your help! It seems to me that Marion tip is important: internal, solar and longwave heat gains could imply the results which was strange for us (temperature on outside surface of TABS higher then air temperature in zone and water temperature). If we found something new then we will write! Regards, From: Marion Hiller [mailto:Hiller@Transsolar.com] Dear Karol, Keep in mind that boundary identical means that the backside gets the same heat flux (absorbed solar + internal gains + longwave exchange from surfaces) as the front side of the surface! In your email you mentioned temperatures only, but you did say anything about the heat fluxes. I suspect that the heat flux causes the temperature increase. Kind regards, Marion From: TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org] On Behalf Of Karol BANDURSKI via TRNSYS-users Dear Christoph, Thank you for response! But we need to be more clear: When we set:
Then temperature on back surface is about 26 C. In other words Tso is higher than Tsi and water temperature, while there is no internal heat gains. Why? Kind regards, Karol From: hotline [mailto:hotline@Transsolar.com] Dear Karol and Katarzyna, If boundary conditions = IDENTICAL, the surface temperatures of the active wall Tsi and Tso will only be identical, if:
Best __________________________________________________________________________________________________ Christoph Stetter M.Eng. Transsolar Energietechnik GmbH Curiestraße 2 70563 Stuttgart 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 Karol Bandurski via TRNSYS-users Dear Users and Developers, We would like to model active layer as component of TABS. Now our model is one zone with active layer in ceiling. Adiabatic condition/IDENTICAL for all internal partition and set. We have one external wall.
Kind regards, -------------------------------------------------------------------- Karol BANDURSKI M. Sc. Faculty of Civil and Environemntal Engeneering Division of Heating, Air Conditioning and Air Protection Poznan University of Technology https://www.researchgate.net/profile/Karol_Bandurski www.put.poznan.pl/~karol.bandurski |