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From: geo_limnaios@hotmail.com<BR>To: trnsys-users@engr.wisc.edu<BR>Subject: PCM TYpe 204<BR>Date: Fri, 5 Jun 2009 08:53:23 -0500<BR><BR>
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Hello TRNSYS Users,<BR> I'm Limnaios George and i'm working my masters thesis at Technical University of Crete. I want to use TRNSYS Type 204 for the simulation of PCM layers on a building. Has anyone used this type before? It takes forever to run an one week simulation...However the main problem is i cannot understand the way the model simulates a PCM layer...<BR>My questions are about the SUNSPACE example supplied into the files package loaded : <BR>There are 2 air zones in the TRNBUILD type 56 model of this example : SunZone and BackZone.<BR>SunZone is where "PCM wall" has been installed. So : <BR><BR> - How to make the difference if we want "PCM layer" into all walls surfaces from SunZone, or only into some of them?<BR><BR> - Why the resistance of the "PCM massless layer" created in TRNBUILD is only 0.1 m².K.h/kJ? <BR><BR> - Why the "PCM wall" using the "PCM massless layer" into SunZone (boundary wall calling T_PCM input) presents a so small surface of 0.2 m²?<BR><BR> - Why QCOMI is taken from the same "PCM Wall" (14) and not from other walls?<BR><BR> - Do we have to change values into the 4 text external files supplied (NodeTemp.txt, Tila.txt, Ceff1.txt, ALKU.txt) or do we only have to call their path? <BR><BR> - Why the PCMeT (average surface temperature of "PCM wall") calculated by type 204 is sent to the boundary "PCM wall" input (T_PCM) into type 56 ? <BR> type 204 receives QCOMI from 0.2 m² surface (14), and T_AIR from SunZone volume, <BR> then it calculates and sends T_PCM to boundary input for 0.2 m² surface (14)<BR> => I don't see in which way this sequence allows modelization of PCM introduction into a wall?<BR>I searched all the mailing list but i just found the same questions..and no answers...<BR>Please help...Thanks in advance<BR>Limnaios George<BR><BR><BR>
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