Does anyone trys to simulate a solar dryer having a dryer bed is there any one inserts anew part that is a dryer bed in trnsys studio if so please I didn't get the equation that express the bed try to write your idea to me
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Today's Topics:
1. Convergence failure in the simulation (h8304506@hkusua.hku.hk)
2. Solar combi system for domestic hot water and space heating
(Timo Sengewald)
3. Errors in rebuilding TRNDll.dll (h8304506@hkusua.hku.hk)
4. Re: Convergence failure in the simulation (David Bradley)
5. Re: Errors in rebuilding TRNDll.dll (David Bradley)
From: h8304506@hkusua.hku.hk
To: "group, Trnsys discussion" <trnsys-users@engr.wisc.edu>
Date: Tue, 22 May 2007 10:17:49 +0800
Subject: [TRNSYS-users] Convergence failure in the simulation
Dear all.
I am simulating a GSHP system, but receive warnings that some units do
not converge at particular time steps. The simulation stops after the
number of warnings reach a limit. I try to adjust the minimum
relaxation factor and tolerance of convergence in the control card,
but it seems to have no improvement. Please advise how I can fix it?
Thank
you!
Yours sincerely,
LEE, Chun Kwong
PhD student
Department of Mechanical Engineering
University of Hong Kong
From: "Timo Sengewald" <Timo.Sengewald@BLS-Energieplan.de>
To: <trnsys-users@engr.wisc.edu>
Date: Tue, 22 May 2007 11:11:11 +0200
Subject: [TRNSYS-users] Solar combi system for domestic hot water and space
heating
Hello TRNSYS experts!
Does anybody of you has any experience simulating a solar combi system using a combined tank (hot water tank within heating water tank)? Is there any type which model that kind of tank in tank system?
Thanks in advance!
Best Regards
Timo
________________________________________________
Timo Sengewald
BLS Energieplan GmbH
Elsenstraße 106
D-12435 Berlin
Tel.: +49 30 53 32 81-0
Fax: +49 30 53 32 81-40
www.bls-energieplan.deGeschäftsführer: Christoph-F. Lange, Wolfgang Sturm
Registergericht: Amtsgericht Berlin-Charlottenburg, HRB-Nr. 32021
Steuernummer: 37/105/2005, USt-IdNr.: DE 136569080
From: h8304506@hkusua.hku.hk
To: "group, Trnsys discussion"
<trnsys-users@engr.wisc.edu>
Date: Tue, 22 May 2007 21:38:40 +0800
Subject: [TRNSYS-users] Errors in rebuilding TRNDll.dll
Dear all.
I have made some changes in the source code for Type108 (5 stage
thermostat). When I try to rebuild the TRNDll.dll by opening the
Cvf66.dsw workspace at \Trnsys16\Compilers\Cvf66\ sub-directory using
Compaq Visual Fortran, a lot of errors are found. I am using Cvf6.5.
Is it the cause for the errors? Please advise. Thank you!
Yours sincerely,
LEE, Chun Kwong
PhD student
Department of Mechanical Engineering
University of Hong Kong
From: David Bradley <bradley@tess-inc.com>
To: h8304506@hkusua.hku.hk,
"group, Trnsys discussion" <trnsys-users@engr.wisc.edu>
Date: Tue, 22 May 2007 11:02:46 -0500
Subject: Re: [TRNSYS-users] Convergence failure in the simulation
Chun Kwong,
Convergnce problems are a result of one of two things usually.
Either there is not enough thermal capacitance in a given flow loop
(such as a piping network) or the time step is too big. If I recall,
your simulation was using a 1 hour time step. I would recommend
starting by reducing that time step to 0.125 hours to see if that
solves the convergence problems. The bore field and the building in
your system should be providing adequate thermal capacitance.
Kind regards,
David
At 21:17 5/21/2007, h8304506@hkusua.hku.hk wrote:
>Dear all.
>
>I am simulating a GSHP system, but receive warnings that some units do
>not converge at particular time steps. The simulation stops after the
>number of warnings reach a limit. I try to adjust the minimum
>relaxation factor and tolerance of convergence in the control card,
>but it seems to have no improvement. Please advise how I can fix it?
>Thank you!
>
>Yours sincerely,
>LEE, Chun
Kwong
>PhD student
>Department of Mechanical Engineering
>University of Hong Kong
>
>
>
>
>_______________________________________________
>TRNSYS-users mailing list
>TRNSYS-users@engr.wisc.edu
>https://www.cae.wisc.edu/mailman/listinfo/trnsys-users
****************************************************************************************
Thermal Energy System Specialists (TESS), LLC
David BRADLEY 2916 Marketplace Drive - Suite 104
Partner Madison, WI 53719
Phone: (608) 274-2577 USA
Fax: (608) 278-1475
E-mail: bradley@tess-inc.com
Web Pages: http://www.tess-inc.com and http://www.trnsys.com
"Providing software solutions for today's energy engineering projects"
****************************************************************************************
From: David Bradley <bradley@tess-inc.com>
To: h8304506@hkusua.hku.hk,
"group, Trnsys discussion"
<trnsys-users@engr.wisc.edu>
Date: Tue, 22 May 2007 11:04:24 -0500
Subject: Re: [TRNSYS-users] Errors in rebuilding TRNDll.dll
Dear Chun Kwong,
The compiler version could well be the cause. I recall that there
were some bugs in the CVF 6.5 compiler that were fixed in release 6.6b.
Kind regards,
David
At 08:38 5/22/2007, h8304506@hkusua.hku.hk wrote:
>Dear all.
>
>I have made some changes in the source code for Type108 (5 stage
>thermostat). When I try to rebuild the TRNDll.dll by opening the
>Cvf66.dsw workspace at \Trnsys16\Compilers\Cvf66\ sub-directory using
>Compaq Visual Fortran, a lot of errors are found. I am using Cvf6.5.
>Is it the cause for the errors? Please advise. Thank you!
>
>Yours sincerely,
>LEE, Chun Kwong
>PhD student
>Department of Mechanical Engineering
>University of Hong
Kong
>
>
>
>
>_______________________________________________
>TRNSYS-users mailing list
>TRNSYS-users@engr.wisc.edu
>https://www.cae.wisc.edu/mailman/listinfo/trnsys-users
****************************************************************************************
Thermal Energy System Specialists (TESS), LLC
David BRADLEY 2916 Marketplace Drive - Suite 104
Partner Madison, WI 53719
Phone: (608) 274-2577 USA
Fax: (608) 278-1475
E-mail: bradley@tess-inc.com
Web Pages: http://www.tess-inc.com and http://www.trnsys.com
"Providing software solutions for today's energy engineering projects"
****************************************************************************************
_______________________________________________
TRNSYS-users mailing list
TRNSYS-users@engr.wisc.edu
https://www.cae.wisc.edu/mailman/listinfo/trnsys-users