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Re: [TRNSYS-users] Fwd: Converging error



Dear Wang,

 

there are several issues within your simulation concerning the outside longwave exchange of external surfaces

 

1.)     You didn’t connect TSGRD such that it is set 0 =>  If you have no information set it Tamb

2.)     For Sky temperature calculation with Type 69, you forgot to enter the height above sea level.

3.)     You read the ambient temperature and the relative air humditiy from a userdefined file by type 9
instead of using the data from the weather file.
This file wasn’t attached, but it might be an error source especially when interpolating incorrect data.
For testing, please use the ambient temperature and rel. humidity from the assigned weather file throughout your simulation.
Please check your userdefined data and the outputs of Type 9 WITHOUT connecting them to TYPE 56.

4.)     In addition, please check the component order. The data reader Type 9 is placed after the building.

 

Marion

 

 


  

Von: 王洋 [mailto:wanghongyang1767@gmail.com]
Gesendet: Montag, 8. Oktober 2012 15:31
An: trnsys-users@cae.wisc.edu; hotline
Betreff: Fwd: Converging error

 

 

Dear Marion and TRNSYS Users,

Thanks for your reply!

I checked all you mentioned, I can't find any special/abnormal settings. Furthermore, it runs well when the time step is 1 hour. For other steps e.g. 0.1 h, 0.2 h or 0.5 h, it appears that ERROR.

Please help me have a look at the attached project if you are free.

Many thanks in advance!

br.

wang

---------- Forwarded message ----------
From:
王洋 <wanghongyang1767@gmail.com>
Date: 2012/9/28
Subject: Converging error
To: trnsys-users@cae.wisc.edu, hotline@transsolar.com



---------- 已转发邮件 ----------
From: "hotline" <hotline@transsolar.com>
To: trnsys-users <trnsys-users@cae.wisc.edu>
Cc: 
Date: Fri, 28 Sep 2012 12:02:00 +0200
Subject: Re: [TRNSYS-users] Converging error

Wang,

 

This problem may occur from incorrect ambient condition settings:

Please check the following inputs of Type 56

1- TAMB

2- RELHUMAMB

3- TSKY

4- TSGRD

 

In addition make sure that in the BUI file the surface

-         outside emissitive is ≤ 1

-         outside convective heat transfer coefficient ist set to reasonable value

 

If the error presits, we need the complete project to give further advice.

 

 

Marion

2012/9/28 <trnsys-users-request@cae.wisc.edu>

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Today's Topics:

   1. Re: problem with iterations?? (Matt Duffy)
   2. Re: problem with iterations?? (Marion Hiller)
   3. Re: Converging error (hotline)


----------
已转发邮件 ----------
From: Matt Duffy <duffy@tess-inc.com>
To: <trnsys-users@cae.wisc.edu>
Cc: 
Date: Thu, 27 Sep 2012 12:04:24 -0500
Subject: Re: [TRNSYS-users] problem with iterations??

Karol,

 

I noticed from your listing (*.lst) file that your working directory is located on your computer's desktop directory. This is not recommended due to the potential issues with the Windows OS system and write privleges. I would first try changing your working directory to the ".\MyProjects" directory or in a folder right on the "C:" drive. I am not certain that this is the issue with the TRNEXE, but if the problem persists, please contact your distributor, techsupport@tess-inc.com.

 

Best regards,


Matt Duffy

 

On 2012-09-27 03:46, Karol Bandurski wrote:

Dear All,

 

I try to simulate dwelling with natural ventilation. I set some algorithm for window opening and ideal heating for colder part of year for each zone with set temperature depending on time of day.

 

When I run my yearly simulation it stop in one moment and TRNEXE is frozen... There is even no error! Then I can only turn off TRNEXE.

 

Only think what appear (many times) in .lst file is

 

Notice: More than 6 iterations for internal regulation HEATING/COOLING.

 

I will be grateful for any advice!

 

I enclose .lst file.

 

Regards,

 

------------------------------------------------

Karol Bandurski MSc.

Institute of Environmental Engineering

Poznan University of Technology

www.ee.put.poznan.pl

www.put.poznan.pl

 



----------
已转发邮件 ----------
From: "Marion Hiller" <hiller@transsolar.com>
To: "karol.bandurski" <karol.bandurski@put.poznan.pl>
Cc: trnsys-users <trnsys-users@cae.wisc.edu>
Date: Fri, 28 Sep 2012 08:53:53 +0200
Subject: Re: [TRNSYS-users] problem with iterations??

Karol,

 

In general the notice has nothing to do with a frozen TRNEXE.exe,

it is just an information.

 

The message indicates that the internal controller for turning on the

integrated heating/cooling has convergence problems and a deadband is applied to promote convergence.

This may be the case at the moment of turning ON or OFF something.

After 6 internal iterations a deadband is added to promote convergence.

If the convergence isn’t reached after 12 iterations a warning is written to the lst/log file.

 

Regards,

 

Marion

 

 

Dipl.-Ing. Marion Hiller
TRANSSOLAR: KlimaEngineering - Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäude 
Munich - New York - Stuttgart + 49.711.67976.0

Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart 
Amtsgericht Stuttgart - HRB 23347, Steuernummer 99073/00911, USt-IdNr.: DE152272639

Geschäftsführer: Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer, Dipl.Phys. Stefan Holst, Prof. Dipl.-Ing. Bleicher 

 

 


  

  

Von: Karol Bandurski [mailto:karol.bandurski@put.poznan.pl]
Gesendet: Donnerstag, 27. September 2012 10:47
An: trnsys-users@cae.wisc.edu
Betreff: [TRNSYS-users] problem with iterations??

 

Dear All,

 

I try to simulate dwelling with natural ventilation. I set some algorithm for window opening and ideal heating for colder part of year for each zone with set temperature depending on time of day.

 

When I run my yearly simulation it stop in one moment and TRNEXE is frozen... There is even no error! Then I can only turn off TRNEXE.

 

Only think what appear (many times) in .lst file is

 

Notice: More than 6 iterations for internal regulation HEATING/COOLING.

 

I will be grateful for any advice!

 

I enclose .lst file.

 

Regards,

 

------------------------------------------------

Karol Bandurski MSc.

Institute of Environmental Engineering

Poznan University of Technology

www.ee.put.poznan.pl

www.put.poznan.pl

 



----------
已转发邮件 ----------
From: "hotline" <hotline@transsolar.com>
To: trnsys-users <trnsys-users@cae.wisc.edu>
Cc: 
Date: Fri, 28 Sep 2012 12:02:00 +0200
Subject: Re: [TRNSYS-users] Converging error

Wang,

 

This problem may occur from incorrect ambient condition settings:

Please check the following inputs of Type 56

1- TAMB

2- RELHUMAMB

3- TSKY

4- TSGRD

 

In addition make sure that in the BUI file the surface

-         outside emissitive is ≤ 1

-         outside convective heat transfer coefficient ist set to reasonable value

 

If the error presits, we need the complete project to give further advice.

 

 

Marion


  

  

Von: 王洋 [mailto:wanghongyang1767@gmail.com]
Gesendet: Donnerstag, 27. September 2012 11:49
An: trnsys-users@cae.wisc.edu
Betreff: [TRNSYS-users] Converging error

 

Dear all,

I met a converging error when I changed simulation time step 1 hour into 0.1 hour or 0.2 hour or 0.01 hour as follows:
 
*** Fatal Error at time   :      3972.000000
    Generated by Unit     :    56
    Generated by Type     :    56
    Message               : outside temperature of    2(external) wall in zone   1at time  3972.00 not converged!

Please tell me some possible solutions for that if you know. The attached is its Listing File.

Many thanks in advance!
Br.

wang

2012/9/27 <trnsys-users-request@cae.wisc.edu>

Send TRNSYS-users mailing list submissions to
        trnsys-users@cae.wisc.edu

To subscribe or unsubscribe via the World Wide Web, visit
        https://mailman.cae.wisc.edu/listinfo/trnsys-users
or, via email, send a message with subject or body 'help' to
        trnsys-users-request@cae.wisc.edu

You can reach the person managing the list at
        trnsys-users-owner@cae.wisc.edu

When replying, please edit your Subject line so it is more specific
than "Re: Contents of TRNSYS-users digest..."

Today's Topics:

   1. Doctoral Fellowships at TERI University, India (R.K. Singh)
   2. problem with iterations?? (Karol Bandurski)


----------
已转发邮件 ----------
From: "R.K. Singh" <singh.ramkishore@gmail.com>
To: TRNSYS-users@cae.wisc.edu
Cc: 
Date: Thu, 27 Sep 2012 10:04:34 +0530
Subject: [TRNSYS-users] Doctoral Fellowships at TERI University, India

TERI University is currently inviting applications for Doctoral programmes in  Bioresources/Biotechnology;Natural Resource Management, Energy and Environment and Regulatory and Policy studies for semester starting january 2013. A range of scholarship opportunities  are also available  for the students in specific areas, the details of which can be accessed through  the following link.

The last date for application is October  31st, 2012. The details regarding fee, eligibility and other requirements can be accessed through http://teriuniversity.ac.in/index.php?option=com_program

 

For any further details please get in touch with Dr. Sapna A Narula, Associate Professor sapna.narula@teriuniversity.ac.in

 

***********************************************
Dr. Ramkishore Singh
Department of Energy & Environment
TERI University
Tel: 91-11-26122222, Ext. 1302
Fax: 91-11-26122874
Web: www.teriuniversity.ac.in
***********************************************




----------
已转发邮件 ----------
From: "Karol Bandurski" <karol.bandurski@put.poznan.pl>
To: <trnsys-users@cae.wisc.edu>
Cc: 
Date: Thu, 27 Sep 2012 10:46:49 +0200
Subject: [TRNSYS-users] problem with iterations??

Dear All,

 

I try to simulate dwelling with natural ventilation. I set some algorithm for window opening and ideal heating for colder part of year for each zone with set temperature depending on time of day.

 

When I run my yearly simulation it stop in one moment and TRNEXE is frozen... There is even no error! Then I can only turn off TRNEXE.

 

Only think what appear (many times) in .lst file is

 

Notice: More than 6 iterations for internal regulation HEATING/COOLING.

 

I will be grateful for any advice!

 

I enclose .lst file.

 

Regards,

 

------------------------------------------------

Karol Bandurski MSc.

Institute of Environmental Engineering

Poznan University of Technology

www.ee.put.poznan.pl

www.put.poznan.pl

 


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