[TRNSYS-users] Fwd: Error creating the wall transfer function coeffients
王洋
wanghongyang1767 at gmail.com
Sat Nov 17 09:28:15 PST 2012
Dear leen,
Thanks for your email!
I tried till 9 hours as the TIMEBASE which can work. But could you please
tell me the detailed reasons for that? i.e. why we need so large TIMEBASE 9
hours to meet its Stability Criteria?
Thanks in advance!
Br.
wang
2012/11/16 ÍõÑó <wanghongyang1767 at gmail.com>
> Dear leen,
>
> Thanks for your email!
> I tried till 9 hours as the TIMEBASE which can work. But could you please
> tell me the detailed reasons for that? i.e. why we need so large TIMEBASE 9
> hours to meet its Stability Criteria?
>
>
> Thanks in advance!
> Br.
> wang
>
> 2012/11/15 leen peeters <l.f.r.peeters at gmail.com>
>
>> Can you open in TRNBUILD the 'project' window, and consequently the
>> 'outputs', change the timebase for calculation of your transfer function to
>> something higher. I think it is standard on 2 hour, change it into 5,
>> check. If it works, then try 4, ..... until you reach the lowest possible
>> number
>>
>>
>> On Thu, Nov 15, 2012 at 10:28 PM, ÍõÑó <wanghongyang1767 at gmail.com> wrote:
>>
>>> Dear all,
>>>
>>> I have a question about *.BUI file. I create a project with about 30
>>> zones using TRNSYS 16.
>>> Before I created the seventeenth zone using the same exterior wall and
>>> floor as well as interior wall etc for the project, it worked well. But
>>> when the seventeenth zone created, it appeared an ERROR in TRNBuild: Error
>>> creating the wall transfer function coeffients. Please see the attached
>>> figure. The second file is its INF file.
>>>
>>> If you had some relative experience, PLEASE tell me how to solve with
>>> this problem.
>>>
>>> Thanks in advance!
>>> Br.
>>> wang
>>>
>>> ---------- Forwarded message ----------
>>> From: ÍõÑó <wanghongyang1767 at gmail.com>
>>> Date: 2012/11/15
>>> Subject: Error creating the wall transfer function coeffients
>>> To: trnsys-users at cae.wisc.edu
>>>
>>>
>>> Dear all,
>>>
>>> I have a question about *.BUI file. I create a project with about 30
>>> zones using TRNSYS 16.
>>> Before I created the seventeenth zone using the same exterior wall and
>>> floor as well as interior wall etc for the project, it worked well. But
>>> when the seventeenth zone created, it appeared an ERROR in TRNBuild: Error
>>> creating the wall transfer function coeffients. Please see the attached
>>> figure. The second file is its INF file.
>>>
>>> If you had some relative experience, PLEASE tell me how to solve with
>>> this problem.
>>>
>>> Thanks in advance!
>>> Br.
>>>
>>> wang
>>>
>>> 2012/11/12 <trnsys-users-request at cae.wisc.edu>
>>>
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>>>> When replying, please edit your Subject line so it is more specific
>>>> than "Re: Contents of TRNSYS-users digest..."
>>>>
>>>> Today's Topics:
>>>>
>>>> 1. Re: Type 15-2: Relationship between data arrangements,
>>>> simulation times and convergence (David BRADLEY)
>>>> 2. simulation trend opposite to reality (validation)
>>>> (Karol Bandurski)
>>>>
>>>>
>>>> ---------- ÒÑת·¢Óʼþ ----------
>>>> From: David BRADLEY <d.bradley at tess-inc.com>
>>>> To: Flynn Ciaran <ciaran.flynn at aalto.fi>
>>>> Cc: "trnsys-users at cae.wisc.edu" <trnsys-users at cae.wisc.edu>
>>>> Date: Mon, 12 Nov 2012 11:09:38 -0600
>>>> Subject: Re: [TRNSYS-users] Type 15-2: Relationship between data
>>>> arrangements, simulation times and convergence
>>>> Ciar¨¢n,
>>>> Option 1) is incorrect. Type15 is intended to be used with year-long
>>>> weather files that have a 1-hour data interval. The component knows from
>>>> the simulation start and stop time what day of the year it is, so if you
>>>> trick it by setting the simulation start time to hour zero and rearrange
>>>> the weather file to start in the middle of the year, what the Type
>>>> calculates about the sunup and sundown times and what the data file says is
>>>> happening are not going to match at all. Option 2 is the only correct one.
>>>> Best,
>>>> David
>>>>
>>>>
>>>> On 11/12/2012 06:32, Flynn Ciaran wrote:
>>>>
>>>> Hello,****
>>>>
>>>> ** **
>>>>
>>>> I have a couple of questions concerning the relationship between the
>>>> arrangement of data in TMY2 weather files, TRNSYS simulation times and
>>>> convergence errors. I tried looking at the source code but I could not
>>>> figure out the answer..
>>>> I am running a simulation for one year, using Type 15-2 for weather,
>>>> starting at 1h on July 1st and ending at 24h on June 30th. This leaves
>>>> me with two options:
>>>> 1) Either I rearrange the tm2 file to start at 1h on the 1st of July
>>>> and end at 24h on June 30th, and set the simulation start and stop
>>>> times to 0 and 8760h respectively, or
>>>> 2) Either I leave the weather file as it is and set the simulation
>>>> start and stop times at 4344h and 13104h respectively.****
>>>>
>>>> ** **
>>>>
>>>> When I use a provided weather file (e.g. CA-BC-Vancouver-718920.tm2)
>>>> and set the simulation time step at 0.1h, I get the following:****
>>>>
>>>> ** **
>>>>
>>>> ** **
>>>>
>>>> Failed convergence time steps****
>>>>
>>>> Time steps where:
>>>> calculated total horizontal radiation > horizontal extraterrestrial
>>>> radiation****
>>>>
>>>> Time steps where:
>>>> direct normal radiation > solar constant****
>>>>
>>>> Time steps where:
>>>> calculated horizontal beam radiation > total horizontal radiation****
>>>>
>>>> 1)****
>>>>
>>>> 7719****
>>>>
>>>> 10664****
>>>>
>>>> 124****
>>>>
>>>> 3498****
>>>>
>>>> 2)****
>>>>
>>>> 6424****
>>>>
>>>> -****
>>>>
>>>> -****
>>>>
>>>> 13****
>>>>
>>>> ** **
>>>>
>>>> So my question are:****
>>>>
>>>> - Why is TRNSYS giving different error messages if the same
>>>> weather data are used ? (I believe that there are no other types in my file
>>>> that could explain the reason for this)****
>>>>
>>>> - What parameters do the radiation values calculated by
>>>> TRNSYS depend on and how are they calculated? ****
>>>>
>>>> - What is the best approach in this situation (minimal
>>>> radiation errors)?****
>>>>
>>>> ** **
>>>>
>>>> Thanks a lot,****
>>>>
>>>> Ciar¨¢n****
>>>>
>>>> ** **
>>>>
>>>> ** **
>>>>
>>>> ** **
>>>>
>>>> ** **
>>>>
>>>>
>>>> _______________________________________________
>>>> TRNSYS-users mailing listTRNSYS-users at cae.wisc.eduhttps://mailman.cae.wisc.edu/listinfo/trnsys-users
>>>>
>>>>
>>>> --
>>>> ***************************
>>>> David BRADLEY
>>>> Principal
>>>> Thermal Energy Systems Specialists, LLC
>>>> 22 North Carroll Street - suite 370
>>>> Madison, WI 53703 USA
>>>>
>>>> P:+1.608.274.2577
>>>> F:+1.608.278.1475d.bradley at tess-inc.com
>>>> http://www.tess-inc.comhttp://www.trnsys.com
>>>>
>>>>
>>>>
>>>> ---------- ÒÑת·¢Óʼþ ----------
>>>> From: "Karol Bandurski" <karol.bandurski at put.poznan.pl>
>>>> To: <trnsys-users at cae.wisc.edu>, <bldg-sim at lists.onebuilding.org>
>>>> Cc:
>>>> Date: Mon, 12 Nov 2012 18:22:45 +0100
>>>> Subject: [TRNSYS-users] simulation trend opposite to reality
>>>> (validation)
>>>>
>>>> Dear All,****
>>>>
>>>> ** **
>>>>
>>>> I simulate the dwelling in TRNSYS. Last time a try to validate my model
>>>> and I compare simulation results with measurements.****
>>>>
>>>> *Heat consumption* has been measured in dwelling every week (the same
>>>> day of week and the same hour).****
>>>>
>>>> Trnsys simulation generate results for dwelling¡¯s model with ideal
>>>> heating assumptions (set temperature 20/21) ¨CNTYPE2 (sensible *energy
>>>> demand*).****
>>>>
>>>> ** **
>>>>
>>>> Total *heat consumption (measurements)* of dwelling and *energy demand
>>>> (simulation)* of simulated model are quite similar (36 weeks from
>>>> September to June), but if we look on weekly results there are bigger
>>>> difference with interesting regularity:****
>>>>
>>>> ** **
>>>>
>>>> if *heat consumption* decreases from one week to the next, then *energy
>>>> demand* increase, and vice versa (I enclose graph).****
>>>>
>>>> ** **
>>>>
>>>> Could you tell me what can cause this lack of coincidence?****
>>>>
>>>> I will be grateful for any hints!****
>>>>
>>>> ****
>>>>
>>>> Regards,****
>>>>
>>>> Karol****
>>>>
>>>> ** **
>>>>
>>>> ------------------------------------------------****
>>>>
>>>> Karol Bandurski MSc.****
>>>>
>>>> Institute of Environmental Engineering <http://www.ee.put.poznan.pl/>**
>>>> **
>>>>
>>>> Poznan University of Technology****
>>>>
>>>> www.ee.put.poznan.pl****
>>>>
>>>> www.put.poznan.pl****
>>>>
>>>> ** **
>>>>
>>>> _______________________________________________
>>>> TRNSYS-users mailing list
>>>> TRNSYS-users at cae.wisc.edu
>>>> https://mailman.cae.wisc.edu/listinfo/trnsys-users
>>>>
>>>>
>>>
>>>
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>>>
>>>
>>
>
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