Dear all,
I have some questions about Wall heat transfer model in TRNSYS:
1. I only find some equations about wall in Manual( such as Radaitive heat flows to the wall, external walls), but I only can understand a little. Please tell me some reference books about Wall heat transfer model in TRNSYS. Because I simulated an actual test room: the indoor and outdoor temperature keep the same 20°C and 10°C, respectively, during one day 24 hours. As this situation, QHEAT muss be equal to Q heat loss by walls based on energy balance. But the result of QHEAT in TRNSYS is 6632 kJ, but based on heat transfer equations I got the heat loss energy is 24307 kJ. So I want to know the Wall heat transfer model in TRNSYS.
2. To Wall heat transfer model in TRNSYS: Whether it will consider Solar absorptance and Longwave Emission or not? But I didn't define these things. But from NTYPE 906 Energy Balance for surfaces:
1_B6_BAL = - 1_B6_DQWALLdt- 1_B6_QCOMI+ 1_B6_QCOMO+ 1_B6_QRADGI+ 1_B6_QRADGO- 1_B6_QALG
5.839E-14 -2.217E+03 -1.093E-01 -2.217E+03 3.725E-03 0.000E+00 0.000E+00
But We can see B6_QRADGI still has value as 3.725E-03. I cann't understand. Please explain possible reasons for it.
B6_DQWALLdt in Manual is change of internal energy of surface, but it's a little abstract. Here I only used the heatings in TRNBUILD, no other internal gains. PLEASE give me some examples about change of internal energy of surface. Is it energy Generation of Wall etc.? Why here is minus (-2.217E+03)? What's difference between B6_DQWALLdt and B6_QCOMO? Why here they are the same? Is there some reasons?
3. How to get or check the TRNSYS program's source code? And how to get the TRNSYS program's setup files and look over the "compiled" files(fortran) etc.? Because some simulation results I cann't understand such as the above Wall heat transfer model in TRNSYS etc. I want to understand their model and those simulation results and compare with the results by hand.
Many thanks!
br.
wang2011/3/7 <trnsys-users-request@cae.wisc.edu>
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Today's Topics:
1. Re: Questions...please reply (Matt Duffy)
2. Re: Stratified storage Tank (Matt Duffy)
3. Re: Strange error (Rambod Rayegan)
4. Re: Strange error (Matt Duffy)
---------- 已转发邮件 ----------
From: "Matt Duffy" <duffy@tess-inc.com>
To: juvenciotavares@hotmail.com, trnsys-users@engr.wisc.edu
Date: Mon, 7 Mar 2011 09:34:17 -0600 (CST)
Subject: Re: [TRNSYS-users] Questions...please reply
Dear Juvencio,
It appears that when you imported the file into TRNBuild, the application did not find the adjacent surface. This could be for a couple of reasons: the adjacency needs to be defined, or the surface in TRNSYS3D has a face that is reversed. Please refer to the TRNSYS3D tutorial PDF for more great information.
Best regards,
Matt Duffy
----- Original Message -----
From: "Juvêncio Correia Tavares" <juvenciotavares@hotmail.com>
Sent: Fri, March 4, 2011 10:50
Subject: Re: [TRNSYS-users] Questions...please reply
I`m doing a dynamic simulation of buildings in TRNSYS, during the simulation gave the following error ... as you can see in the picture.how can I fix this error?< span title="Clique para obter tradu??es alternativas" class="ecxhps">And also, I would like to send me a PDF about connection.
I await your response.
thanks._______________________________________________ TRNSYS-users mailing list TRNSYS-users@cae.wisc.edu https://mailman.cae.wisc.edu/listinfo/trnsys-users
---------- 已转发邮件 ----------
From: "Matt Duffy" <duffy@tess-inc.com>
To: "Lei Wang" <leiwang@tees.tamus.edu>, trnsys-users@cae.wisc.edu
Date: Mon, 7 Mar 2011 09:41:06 -0600 (CST)
Subject: Re: [TRNSYS-users] Stratified storage Tank
Dear Lei Wang,
I just tried this, and it simulated without problems in version 17, but
when I tried in version 16, I also received the error. I can only
speculate that this is due to the changes that we implemented for
TrnsysConstants - we increased the number of parameters.
Another option besides updating to version 17 is to use the Type534 TESS
Tank model as well. Please let me know if you have any more questions
about this.
Best regards,
Matt Duffy
----- Original Message -----
From: "Lei Wang" <leiwang@tees.tamus.edu>
Sent: Fri, March 4, 2011 16:17
Subject:[TRNSYS-users] Stratified storage Tank
Hi, All
I try to use the Type4a(stratified storage tank) to modeling the ChW
thermal storage
tank, which volume was 1 million gal and height was 100 feet.
The description of the type is as following
"The thermal performance of a fluid-filled sensible energy storage tank,
subject to
thermal stratification, can be modeled by assuming that the tank consists
of N (N <=
100) fully-mixed equal volume segments"
So I think the maximum nodes number can be 100.
But when I input the number of nodes were 100, the TrnExe shows that there
was a
range check error. When I check the list file, there didn't show any error
Information.
When I input the number of nodes were 80, it works fine.
Thanks
Lei
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----- End of original message -----
---------- 已转发邮件 ----------
From: Rambod Rayegan <rraye001@fiu.edu>
To: hotline <hotline@transsolar.com>
Date: Mon, 7 Mar 2011 10:49:42 -0500
Subject: Re: [TRNSYS-users] Strange errorChristian,
Even when I change back the roof property to the previous one, the error exists. It seems, right now, it is independent of the roof property. This is the reason that I called it strange error.
Rambod Rayegan
Ph.D Candidate
Mechanical Engineering Department
Florida International University
10555 W Flagler St, EC3620
Miami, FL, 33174
305-348-3558 (Office)
786-218-7375(Cell)
305-348-1932 (Fax)
On Mon, Mar 7, 2011 at 7:33 AM, hotline <hotline@transsolar.com> wrote:
Hi,seems like you hit a limit for the generation of the transfer function coefficients.Please check if the roof is defined correctly.RegardsChristianTRANSSOLAR Software Team
Transsolar KlimaEngineering - Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäuden
Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart / Amtsgericht Stuttgart - HRB 23347 / UsSt.-Id: DE152272639
Geschäftsführer: Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer, Dipl.Phys. Stefan Holst, Prof. Volkmar Bleicher
Von: Rambod Rayegan [mailto:rraye001@fiu.edu]
Gesendet: Samstag, 5. März 2011 06:08
An: trnsys-users@cae.wisc.edu
Betreff: [TRNSYS-users] Strange errorDear TRNSYS users:
I am working on a model created buy TRNSYS 3d plugin in google sketchup for couple of months. Everyday I add something to it or modify some parameters in it. Today, I have just changed the roof type in the building type 56 and tried to run it again but I have received the following error:Visual Fortran run-time errorfortrtl:severe(64):input conversion error, unit 56, file C:\.....building.trnImage PC Routine Source DFORRT.DLL 02014C49 Unknown Unknown UnknownAnybody has an idea to solve the issue?Thank you.
Rambod Rayegan
Ph.D Candidate
Mechanical Engineering Department
Florida International University
10555 W Flagler St, EC3620
Miami, FL, 33174
305-348-3558 (Office)
786-218-7375(Cell)
305-348-1932 (Fax)
---------- 已转发邮件 ----------
From: "Matt Duffy" <duffy@tess-inc.com>
To: "Rambod Rayegan" <rraye001@fiu.edu>, hotline@transsolar.com
Date: Mon, 7 Mar 2011 09:57:02 -0600 (CST)
Subject: Re: [TRNSYS-users] Strange error
Dear Rambod,
If you send me the IDF file, I might be able to shed some light on the error.
Best regards,
Matt Duffy
----- Original Message -----
From: "Rambod Rayegan" <rraye001@fiu.edu>
Sent: Mon, March 7, 2011 9:49
Subject: Re: [TRNSYS-users] Strange error
Christian,
Even when I change back the roof property to the previous one, the error exists. It seems, right now, it is independent of the roof property. This is the reason that I called it strange error.Rambod Rayegan
Ph.D Candidate
Mechanical Engineering Department
Florida International University
10555 W Flagler St, EC3620
Miami, FL, 33174
305-348-3558 (Office)
786-218-7375(Cell)
305-348-1932 (Fax)On Mon, Mar 7, 2011 at 7:33 AM, hotline <hotline@transsolar.com> wrote:
Hi,seems like you hit a limit for the generation of the transfer function coefficients.Please check if the roof is defined correctly.RegardsChristianTRANSSOLAR Software Team
Transsolar KlimaEngineering - Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäuden &n! bsp;
Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart / Amtsgericht Stuttgart - HRB 23347 / UsSt.-Id: DE152272639
Geschäftsführer: Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer, Dipl.Phys. Stefan Holst, Prof. Volkmar Bleicher
Von: Rambod Rayegan [mailto:rraye001@fiu.edu]
Gesendet: Samstag, 5. Mä! ;rz 2011 06:08
An: trnsys-users@cae.wisc.edu
Betreff: [TRNSYS-users] Strange errorDear TRNSYS users:
I am working on a model created buy TRNSYS 3d plugin in google sketchup for couple of months. Everyday I add something to it or modify some parameters in it. Today, I have just changed the roof type in the building type 56 and tried to run it again but I have received the following error:Visual Fortran run-time errorfortrtl:severe(64):input conversion error, unit 56, file C:\.....building.trnImage PC Routine Source DFORRT.DLL 02014C49 Unknown Unknown UnknownAnybody has an idea to solve the issu! e?Thank you.
Rambod Rayegan
Ph.D Candidate
Mechanical Engineering Department
Florida International University
10555 W Flagler St, EC3620
Miami, FL, 33174
305-348-3558 (Office)
786-218-7375(Cell)
305-348-1932 (Fax)
_______________________________________________ TRNSYS-users mailing list TRNSYS-users@cae.wisc.edu https://mailman.cae.wisc.edu/listinfo/trnsys-users
_______________________________________________
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TRNSYS-users@cae.wisc.edu
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