Dear YUN Zone pressures are referred to the reference height of the zone. The height of the zone reference plane above the building reference plane is defined...
Hello again, I have designed a building with comis 3.0 and I have tried to move my project fron my computer to another computer that has installed comis 3.1....
Dear all The following message was shown for any timesteps. "Air" is only defined as the pollutant for the simulation and I don`t want to get the results...
Dear Soughun, If you are not interested in pollutant transport, I think you can safely ignore this message. If you are editing the COMIS Input File by hand,...
Hello, I've recently started learning how to use COMIS. I have a test case involving a room with a stove inside that produces 50W. How can this be incorporated...
Mike.Deevy@...
Oct 28, 2004 1:32 pm
350
Mike, source schedules are for pollutant source strengths (not energy or temperature), so I don't think they apply here (except if you have a real bad quality ...
Thanks for your help Werner. Could someone tell me why if I use the layer option as an attachment to a zone I get the following error message. ... The H/D/W...
Mike.Deevy@...
Nov 1, 2004 1:22 pm
356
Dear Mike, All "sources" in COMIS refer to sources of indoor air contaminants and gases, e.g. CO2, water vapour. Not sources of heat. COMIS generally can not...
Hello again, in the COMIS 3.0 users guide in the site about windows and doors is it written the next paragraph: "At least one line with opening factor 0.0 and...
... When you specify the window, you can give two or more opening factors, height factors, width factors, etc. for a window. These factors define the behaviour...
Hellow, COMIS users I am working with COMIS-IISiBat version for TRNSYS coupling. I want to ask two questions; 1) When I use only type 157(calling COMIS...
Der YUN 1) In fact, if you really have the same values for all the input parameters, you should get the same results for both, COMIS stand alone and for...
I've a problem with the output-timesteps in comis 3.1. In my model I've put an occupant schedule. In this schedule there are sometimes changes each half hour. ...
The problem I explained before, appears in the next comisexcel-file : http://allserv.ugent.be/~lpwillem/ kind regards, Lieven Willems University Gent...
Dear Lieven Each event of any schedule triggers the calculation of the air flows and the pollutant model and the outputs will be written into the CSO files....
Hello again!!! I have one question about comis 3.0 I hope you could answer me. I have mi simulation in the assembly panel and I run the simulation (VENTILATION...
Hello, Unfortunately, the pollutant module was not completely treated in COMIS 3.0 ; many issues realtive to pollutants have been fixed in COMIS 3.1. In any...
Hello everybody! In the output results of my building I have negative pressures in several zones. I have defined as extern pressure a value of 101 kpa approx....
hey, Just wanted to share some info and see if I could help anyone else lower their mortgage payments, I saved nearly $200 off my monthly payment! Takes two...
In TRNFlow (COMIS) the following formula is used: q=C*(delta p)^n. This factor n is depending on the type of airflow. When the airflow is turbulent the factor...
You shoud refer to measurement data. AIVC Technical Note 44 and AIVC Guide 4 both give typical values for n for different building components, and whole...
Dear all, Is it allowed to define a schedule for a link that is a crack (CR) in COMIS 3.1? According to the guide book, no (schedules are only valid for fans...
Nicolas, we also use schedules on cracks. However our TNO-version of COMIS is a somewhat modified one, so I am not sure that does the trick. Regards, Bas Knoll...
Hi. I'm using COMIS in my MSc work. I'm simulating a room with natural single-sided ventilation. The room has 27m3 and the window is 2m wide and 1,3m tall. The...
Hi Marina, Small room High ach at the same flow rate. 25(ach)*27m3=675 m3/h qv= 0.1875 m3/s The window is large A=2*1.3=2.6 m If the air would use one half...
Phaff, Hans
j.phaff@...
Dec 29, 2004 10:15 am
374
The opening is to the outside. The window has 2,6m2 and it's 1m above ground. At the detailed ventilation output, at the "links" part, it gave me a velocity of...
Oh sorry, v=qv/(A/2)=0.18675/(2.6/2)=0.143654 which is well in range ... J.C. (Hans) Phaff TNO Building and Construction Research Email: J.Phaff@... ...
Phaff, Hans
j.phaff@...
Dec 30, 2004 8:35 am
376
Hi Marina, here a few answers from me maybe others will add. Best regards, hans phaff ... I think it is the velocity reported by the 2VENTilation option of...
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