[TRNSYS-users] TRNSYS-CONTAM-TYPE98

[Donya Sheikh Khan]

Thanks. Just one question. Type97 does it calculate based on the ping pong
method or onion method ?
Den 20/10/2014 23.31 skrev "Dols, William Stuart" <william.dols at nist.gov>:

>  It looks to be “working” now.
> The previous set of files you sent had nothing connected to the control
> input signals.
> The latest set of files has the “new” equation connected to them, so the
> airflow paths are “open” whenever the outdoor temperature rises above 17 C.
>
> In your TRNSYS project, you are only attempting to plot the airflows from
> AMBIENT into the building (signals from Type98 to Temperature-2), but all
> of your flows are out of the building (more on that later).
> Each zone connection (group of paths between two zones) has two flows
> associated with it.
> For example, zone 3 on level 1 (1_3) has two connections with ambient:
> “1_3_to_AMBIENT” and “AMBIENT_to_1_3”.
> These values will always be either zero or positive.
> In your case “xxx_to_AMBIENT” are positive when control values are 1, and
> the others are always zero.
>
> All of the flows being out of the building is a problem, because mass
> balance is not being properly determined.
> This appears to be due to the fact that your zones are becoming isolated
> when all of the paths are closed.
> This in turn “throws off” the airflow calculation, and it no longer
> properly performs the airflow convergence test.
> You should always have some leakage to prevent isolated zones.
> Perhaps the best way to do this for this project is to add a flow path
> next to each of the existing ones with a smaller “infiltration” sized leak.
> This will prevent the isolated zone problem, and provide more reasonable
> results.
> You will need to regenerate the AIR file. See attached files.
>
>
> - Stuart
>
>
>
> *From:* TRNSYS-users [mailto:trnsys-users-bounces at lists.onebuilding.org] *On
> Behalf Of *Donya Sheikh Khan
> *Sent:* Saturday, October 18, 2014 3:03 AM
> *To:* TRNSYS users mailing list at OneBuilding.org
> *Subject:* Re: [TRNSYS-users] TRNSYS-CONTAM-TYPE98
>
>
>
> Sorry I forgot to attache the files
>
>
>
> 2014-10-18 9:01 GMT+02:00 Donya Sheikh Khan <donya_sh at msn.com>:
>
> Actually it is TRNSYS that doesn't show me results, if I try to display
> the results using Contam, it shows me my airflows
>
>
>
>
>
> 2014-10-18 8:47 GMT+02:00 Donya Sheikh Khan <donya_sh at msn.com>:
>
> Hi,
>
>
>
> Thanks again..
>
>
>
> I have tried to create a new model by trying to follow the cottage example
> as much as I can. I have connected TYpe98 to an equation which sends a
> signal 1 only if the outdoor temperatures are above 17. Still I don't get
> any air-flow to the orifice.
>
>
>
> I'm not sure of what you mean about "you need to connect something to the
> input signal.."?
>
>
>
> Regards
>
> Donya
>
>
>
> 2014-10-17 22:18 GMT+02:00 Dols, William Stuart <william.dols at nist.gov>:
>
>
>
> You need to connect something to the “Input signal to control named: <…>”
> INPUTS of Type98, i.e., <atrium_v1c>, <Rum2.1_eksc>, etc.
> These values will be transferred to the associated named controls of the
> CONTAM PRJ file via Type98.
> Note that if you want to control more than one item in CONTAM with a
> single value, you can use phantom control nodes within the PRJ.
> You can reference the named control nodes within CONTAM with a phantom
> node.
> This is demonstrated in the cottage_dcv example provided with Type98 files.
>
> - Stuart
>
>
>
> *From:* TRNSYS-users [mailto:trnsys-users-bounces at lists.onebuilding.org] *On
> Behalf Of *Donya Sheikh Khan
> *Sent:* Friday, October 17, 2014 3:40 PM
> *To:* TRNSYS users mailing list at OneBuilding.org
> *Subject:* Re: [TRNSYS-users] TRNSYS-CONTAM-TYPE98
>
>
>
> Hi
>
>
>
> Thanks for your replay. Here is my model. I tried looking at the model, I
> can't immediately see, what that can be causing this problem.
>
>
>
> Thanks
>
> Donya
>
>
>
> 2014-10-17 13:19 GMT+02:00 Dols, William Stuart <william.dols at nist.gov>:
>
> Donya,
>
> It sounds like you have the right idea, but it’s hard to tell exact
> details from your description.
> Have you run the example case provided with Type98?
> This example provides control of simple AHS flows and an HRV fan via
> control signals provided to/from CONTAM from/to TRNSYS via Type98, i.e.,
> both signal directions are demonstrated to synchronize system flows between
> CONTAM and Type56.
>
> If you want, you can send me your files, and I will look at them.
>
> There are some things you can do to help debug your issues:
> - Create report controls in the associated CONTAM project file and view
> outputs in <your project>.log file.
> - Plot/output signals in TRNSYS to ensure correct logic, etc.
> - Set the first value in the air file to 3 to write detailed data exchange
> info to the Type98.log file available in the Type98 AppData directory,
> e.g., in Windows 7 C:\Users\<you>\AppData\<Roaming>\NIST\Type98.
>
> Regards,
> - Stuart
>
>
> W. Stuart Dols
> National Institute of Standards and Technology
> Engineering Laboratory
> Indoor Air Quality and Ventilation Group
> 100 Bureau Drive MS 8633
> Gaithersburg, MD 20899-8633
> www.bfrl.nist.gov/IAQanalysis
>
>
>
>
>
> *From:* Donya Sheikh Khan [mailto:donya_sh at msn.com]
> *Sent:* Thursday, October 16, 2014 2:26 PM
> *To:* trnsys-users at lists.onebuilding.org
> *Subject:* [TRNSYS-users] TRNSYS-CONTAM-TYPE98
>
>
>
> Hi
>
>
>
> I'm a student at Aarhus University in Denmark. I'm trying to create a
> Contam model, where I have a section of a building with an atrium, where I
> want to use natural ventilation during summer to ventilate the rooms.
>
>
>
> I use Contam3.1 and TRNSYS 17 to couple Type56 and Type98 with each other.
> The coupling is going as planned. I have used constant controllers in
> Contam to get manual inputs, so I can vary the opening area of my paths.
> When I manually set the inputs from the controllers to have a value (e.g.
> 1) in Type98 everything is well (I get values of the flow), and when I try
> to connect it to an equation with a constant value, I still have a flow.
> But when I connect the input values to an equation with a variable value
> (e.g. from 1 if the outdoor temperature is 17C and above and 0 otherwise) I
> don't get any flow (looking over 8760 hr) - it is as if it can't read
> variable values.
>
>
>
> Now when I copy everything but just use Type97 instead of Type98 and use a
> variable input value for the controller I get a flow. The only thing is, I
> get a convergence error because the Type56 isn't converging. This gives me
> some pretty huge errors when I compare my TRNSYS-Type98 model with
> TRNSYS-Type97 model.
>
>
>
> My questions is, I really want to use Type98, is there any way I can fix
> the problems with the model not accepting variable input-control-signals?
> and if nothing can be done, how can I fix the convergence problem?
>
>
>
> --
>
> Regards
>
> Donya Sheikh Khan
>
>
>
> --
>
> Med venlig hilsen
>
> Donya Sheikh Khan
>
>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at lists.onebuilding.org
> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>
>
>
>
>
> --
>
> Med venlig hilsen
>
> Donya Sheikh Khan
>
>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at lists.onebuilding.org
> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>
>
>
>
>
> --
>
> Med venlig hilsen
>
> Donya Sheikh Khan
>
>
>
>
>
>
>
> --
>
> Med venlig hilsen
>
> Donya Sheikh Khan
>
>
>
>
>
>
>
> --
>
> Med venlig hilsen
>
> Donya Sheikh Khan
>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at lists.onebuilding.org
> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20141021/42701867/attachment-0002.htm>