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Francis,<br>
There is no difference between Type77 and Type501. The component
started out in the TESS Libraries as Type501 but was donated to the
standard library and given a new number. It is still in the TESS
Libraries for backward compatibility. The thing to remember about
that model is that it is an undisturbed ground temperature model
meaning that no matter how much energy you remove from the ground or
add to the ground, the ground temperature will only ever be a
function of the time of year. If you are using this in a geothermal
application where you are rejecting energy to the ground and
removing energy from the ground, the ground temperature will be
impacted and you should look at using Type557. If you are drawing
air through tubes in the ground then you should look at using
Type460 (Pierre Holmuller's earth duct model as implemented by
Transsolar)<br>
<br>
If you aren't able to find data for Type501 then the following
will get you started: For the mean soil temperature, use the average
annual air temperature for your location. For the amplitude, plot
out the monthly average temperature for your location and calculate
the biggest difference between the average annual temperature and
the monthly average temperatures. For the time shift, use 30.<br>
<br>
Best,<br>
David<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 7/2/2012 09:21, Francis KERBER
wrote:<br>
</div>
<blockquote
cite="mid:CAEk4PMG1GP5fryw6FS736WMz+2xznP7jQYh+YhBE1xE14_0YTA@mail.gmail.com"
type="cite">
<div>Dear all,</div>
<div> </div>
<div>I'm quite new on trnsys and I have few questions about my
modelisation.</div>
<div> </div>
<div>Firstable, I'd like to simulate the ground temperature
instead of using a constant, which is less precise. I heard
about type 501 and type 77. Is there any difference between
those types? Which one is the best? Moreover, where to find the
informations the type needs as inputs, like mean soil
temperature, amplitude of Paris...?</div>
<div> </div>
<div>My project includes a Air treatment unit with a wheel heat
exchanger, two fans, and two batteries (warm water and cold
water batteries). I get a final regulation system, wich is a
ventilating and cooling or heating system (by warm water and
cold water batteries as well), depending on the set temperature.
I do understand the system but I don't really know how to
modelise it. Is ther any existing type I can use? Should I
detail each system like my fans, my batteries...which seems to
be complicated.</div>
<div>Moreover if I have this final regulation system in each room,
must I create as much types as number of rooms?</div>
<div> </div>
<div>If u have any idea that would be helpful!!!!!</div>
<div> </div>
<div>Thanks a lot for ur answers</div>
<div> </div>
<div>Francis.</div>
<br>
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<br>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
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