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Dear Hector,<br><br>
You can read below the communication between Diego and me about this
subject. I hope this helps.<br><br>
Kind regards,<br>
Christophe.<br><br>
<br>
Dear Diego,<br>
<br>
Thanks for your help, I appreciate.<br>
I’m afraid there is a mistake in your proposal : I don’t think QSOLGAIN
is equal to QTABSI + QTABSO. I’ve done some simulations and compared
values of energy_zone.bal with direct outputs : at any time I find that
QSOLGAIN = QTSABS (NTYPE 75) and not at all QTABSI + QTABSO. It seems
logical for me : QTABSI and QTABSO are total radiation absorbed at all
inside/outside surf. of zone (<b>includes solar gains, radiative heat,
internal radiative gains and wallgains</b>) (see volume 6, part 2, page
96). It doesn’t correspond to solar gains…don't you agree ?<br>
<br>
I will adopt your proposal to obtain the energy balance of my building
but it is not perfectly satisfying. In my job, more and more projects use
dynamic simulation of building. It is very interesting because, thanks to
dynamic simulation, we learn a lot of things about thermal behaviour of
buildings. But we have to be sure of our simulation results. In thermal
simulations, it is always satisfying to verify that energy balance is OK.
It is a good indicator of coherence of results. That’s why I think it may
be very useful to have access to QTRANS in direct outputs. Don’t you
think it can be included in the next version of TRNSYS 16 ?<br>
<br>
An other suggestion : it may be very useful for TRNSYS Users to have
access to scientific papers about studies using TRNSYS (I know there
exist a lot of papers about scientific studies using dynamic simulation,
especially in solar energy…). Reading these papers can be very reassuring
concerning validations of models, useful concerning limits of models,
etc.<br>
<br>
I think many TRNSYS Users don’t have the time to search these kind of
papers in the web. Don’t you think it can be possible to have access to
these papers or links to site where they can be found, in your SEL
Website ?<br>
<br>
Best regards,<br>
<i>Christophe.<br><br>
</i>At 17:04 09/11/2005, Diego A. Arias wrote:<br>
<blockquote type=cite class=cite cite="">Dear Christophe:<br><br>
The energy balance on a zone is given by:<br>
BAL_ENERGY = -DQAIRdt + QHEAT - QCOOL + QINF + QVENT + QCOUP + QTRANS +
QGINT + QWGAIN + QSOLGAIN<br>
BAL_ENERGY should be always 0.<br><br>
You can get many of these values using the optional outputs
(NTYPES):<br>
DQAIRdt --> DQAIR (NTYPE8)<br>
QHEAT --> QHEAT (NTYPE30)<br>
QCOOL--> QCOOL (NTYPE31)<br>
QINF --> QINF (NTYPE4)<br>
QVENT --> QVENT (NTYPE5)<br>
QCOUP --> QCOUP(NTYPE6)<br>
QGINT --> QGCONV(NTYPE7) + QGRAD(NTYPE13)<br>
QWGAIN --> QTWG (NTYPE76)<br>
QSOLGAIN --> QTABSI (NTYPE14) + QTABSO(NTYPE15)<br><br>
The only variable that is not given as an optional output is QTRANS. But,
as you have all of the other variables, it can be calculated from the
energy balance.<br>
Please let me know if this helps.<br>
Best regards,<br><br>
Diego<br><br>
<br>
Enertech wrote:<br><br>
<blockquote type=cite class=cite cite="">Dear Diego,<br><br>
Thanks for your solution. Even if it isn't the most cleanest solution, I
don't really care. But I think the most simplest solution would be to
obtain the same energy balance that in the file energy_zone.bal, with
direct outputs (see the second part of my email). I found the equivalent
output of QSOLGAIN : this is QTSABS (NTYPE75, see volume 6, part 2, page
98), but I don't know how to obtain the equivalent output (or combination
of outputs) of QTRANS. Do you have an idea ?<br><br>
Kind Regards,<br><br>
Christophe<br><br>
At 17:07 08/11/2005, Diego A. Arias wrote:<br><br>
<blockquote type=cite class=cite cite="">Dear Christophe:<br><br>
Unfortunately, the renaming of the output files only occurs in files that
have the same file name as the input file.<br><br>
An alternative could be to take advantage of the possibility that TRNSYS
can be run from the command line. If you type 'TRNExe.exe
<br>
Input.dck', TRNSYS will start and execute the input file Input.dck
<br>
This alternative allows you to run batch files. For example, you
can have in your batch file:<br><br>
"C:\Program Files\Trnsys16\Exe\TRNExe.exe" "C:\Program
Files\Trnsys16\MyProjects\input1.dck" /N<br>
"C:\Program Files\Trnsys16\Exe\TRNExe.exe" "C:\Program
Files\Trnsys16\MyProjects\input2.dck" /N<br><br>
In this case, TRNSYS will start and run input1.dck, close, open again and
run input2.dck. The command /N tells TRNSYS not to display the
dialog box at the end of the simulation.<br><br>
This may not be the cleanest solution, since you will have to create the
input files by hand, but I do not know of another way to work out this
problem.<br>
Please let me know if you need additional information of how to implement
this.<br>
Best regards,<br><br>
Diego<br><br>
Enertech wrote:<br><br>
<blockquote type=cite class=cite cite="">Dear TRNSYS Users,<br><br>
In a building simulation study, I want to do a batch simulation by
changing automatically several parameters. So, I would like to use
TRNEDIT and a parametric table. My problem is that the file I want to
use,"Energy_zone.bal", is overwritten at each simulation and
that I don't know how to increment this file name.<br><br>
I know that the output file must have the same name that the *.trd file
to be incremented but I don't know how to change the name of
energy_zone.bal.<br>
As a solution, I'm trying to recalculate the data contained in the file
"energy_zone.bal" with direct outputs of the *.bui file, but I
don't know how to calculate QTRANS and QSOLGAIN (see volume 6 part 2,
page 103), these variables are not direct outputs.<br>
So, what do you think I should do ?<br><br>
Thanks a lot for your help.<br>
Christophe</blockquote></blockquote></blockquote></blockquote>e<At
13:32 24/01/2006, Héctor Montoya wrote:<br>
<blockquote type=cite class=cite cite="">Hello Trnsys users.<br><br>
I'm checking the energy balance in my project, but is impossible
to<br>
get QTRANS as an ouput in TRNbuild. Is there any possibility
to get<br>
this value? Besides energy balance for one zone equal
zero.<br><br>
Thanks.<br><br>
Héctor Montoya M.<br>
Alumno de Magíster en Ingeniería Mecánica<br>
Universidad de Concepción<br>
Concepción - Chile.<br><br>
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