|
Arnaud, For the coupling of the models, the nodal airflow model and the thermal energy balance model, everything is based on mass flows. For the airflow model (TRNFLow) the density in an airnode varies whereas for the thermal model of Type56 the density doesn’t change.
It’s defined in the dialog “properties”. I’m not aware the densities are available as outputs. Furthermore, if I try plotting the TRNFLOW output "ACHZ" for on zone in a very simple test model (external node --> duct --> zone --> fan ---> external node), to get an idea of the volumetric
flow rate, i got zero value (although other indicators, such as FLNEL show me coherent mass flow rate).
Marion -----------------------------------------------------------------------------------------------------------------------------------------------------------
Dipl.-Ing. Marion Hiller 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 Arnaud Candaele via TRNSYS-users Hello, I'd like to know where I could find details about the assumptions taken in TRNBUILD/TRNFLOW to compute the air density is a room (or in a TRNFLOW link). None of the outputs give this information (if I'm not
mistaken!), and all flow rates are expressed in kg/h. Furthermore, if I try plotting the TRNFLOW output "ACHZ" for on zone in a very simple test model (external node --> duct --> zone --> fan ---> external node), to get an idea of the volumetric flow rate, i got
zero value (although other indicators, such as FLNEL show me coherent mass flow rate). Can somebody help me on this subject? Best regards, Arnaud. |