<br><tt><font size=2>The use of the “Number of simulation years” is briefly
explained in the Simulation Studio under the "More" tab. It is
my understanding that this parameter is used to internally generate an
appropriate mesh size and extent for the finite difference calculations.
So, depending on the years of your simulation, heat fluxes will propagate
from the center of the grid to the edges, and temperatures may build up
(or deplete) incorrectly at the grid boundaries if the overall finite difference
grid size is not large enough. In short, the Duct Storage Model uses this
value of “Number of simulation years” to properly size the finite difference
grid. </font></tt>
<br>
<br><tt><font size=2>Hope this helps.</font></tt>
<br>
<br><font size=2 face="sans-serif">Andrew Chiasson<br>
University of Dayton<br>
Department of Mechanical and Aerospace Engineering / Renewable and Clean
Energy<br>
300 College Park Dr. <br>
Kettering Labs, Room 361<br>
Dayton, OH 45469-0238<br>
937-229-2892 (W)<br>
937-229-4766 (Fax)</font>
<br>
<br><tt><font size=2>"Francois Badinier" <francois.badinier@icax.co.uk>
wrote on 02/02/2010 05:42:26 AM:<br>
<br>
> "Francois Badinier" <francois.badinier@icax.co.uk>
</font></tt>
<br><tt><font size=2>> 02/02/2010 05:47 AM</font></tt>
<br><tt><font size=2>> <br>
> To</font></tt>
<br><tt><font size=2>> <br>
> "'Nicola Sorbi Unipg'" <nicolasorbi@mach.ing.unipg.it>,
<br>
> <Goran.Hellstrom@matfys.lth.se>, "'TRNSYS ALL USER'"
<trnsys-<br>
> users@engr.wisc.edu>, <transsolar@transsolar.com></font></tt>
<br><tt><font size=2>> <br>
> cc</font></tt>
<br><tt><font size=2>> <br>
> Subject</font></tt>
<br><tt><font size=2>> <br>
> Re: [TRNSYS-users] information about Tape 557 Transys</font></tt>
<br><tt><font size=2>> <br>
> Hi Nicola</font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> Your question is interesting, as I am a regular
user of this Type, <br>
> and I noticed that changing the value of this parameter has barely
<br>
> no influence on the simulation, i.e. even if you are simulating over<br>
> a 10-year period, entering 1 or 10 seem to make no difference at all.
</font></tt>
<br><tt><font size=2>> This is what I noticed, and I take your question
further to the <br>
> “experts” of this type, “Is it meant to have an influence on the
simulation”?</font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> Kind regards,</font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> François Badinier</font></tt>
<br><tt><font size=2>> Development Engineer</font></tt>
<br><tt><font size=2>> ICAX Ltd</font></tt>
<br><tt><font size=2>> 1 Hatfield House </font></tt>
<br><tt><font size=2>> Baltic Street West</font></tt>
<br><tt><font size=2>> London EC1Y OST</font></tt>
<br><tt><font size=2>> francois.badinier@icax.co.uk</font></tt>
<br><tt><font size=2>> </font></tt><a href=www.icax.co.uk><tt><font size=2>www.icax.co.uk</font></tt></a>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> From: Nicola Sorbi Unipg [</font></tt><a href=mailto:nicolasorbi@mach.ing.unipg.it><tt><font size=2>mailto:nicolasorbi@mach.ing.unipg.it</font></tt></a><tt><font size=2>]
<br>
> Sent: 02 February 2010 09:44<br>
> To: Goran.Hellstrom@matfys.lth.se; TRNSYS ALL USER; transsolar@transsolar.com<br>
> Subject: [TRNSYS-users] information about Tape 557 Transys</font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> Dear professor, I’m a PhD working in Perugia
University.</font></tt>
<br><tt><font size=2>> I’m using Trnsys to simulate a GHP system. I’m
using the Tape 557 <br>
> “Duct Ground Heat Storage Model”. I need to know the meaning of
the <br>
> parameter “Number of simulation years”.</font></tt>
<br><tt><font size=2>> If I use a value of 10 year and I print the values
of ground <br>
> temperature simulated using TRNSYS16 (using 8760 hours of simulation<br>
> in Transys), does the software give the temperature after 10 years
<br>
> of simulation?</font></tt>
<br><tt><font size=2>> Waiting your reply,</font></tt>
<br><tt><font size=2>> Best regards.</font></tt>
<br><tt><font size=2>> Nicola </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> [image removed] </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> [image removed] </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> [image removed] </font></tt>
<br><tt><font size=2>>
Dott. Ing. Nicola Sorbi</font></tt>
<br><tt><font size=2>>
</font></tt>
<br><tt><font size=2>> UNIVERSITA'
DEGLI STUDI DI PERUGIA</font></tt>
<br><tt><font size=2>> Dipartimento
di Ingegneria Industriale</font></tt>
<br><tt><font size=2>> Via
G. Duranti 1A/4 - 06125 Perugia</font></tt>
<br><tt><font size=2>> Tel.
+39 075/5853930 - Fax. +39 075/5853736 </font></tt>
<br><tt><font size=2>> E-mail
nicolasorbi@mach.ing.unipg.it</font></tt>
<br><tt><font size=2>> [image removed] </font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> </font></tt>
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> 02/01/10 12:37:00_______________________________________________<br>
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