[TRNSYS-users] TRNFLOW

[manoj kumar singh]

Dear Wirich,

I will suggest you to increase the zone capacitance to at least  ​20-25
times of zone volume. If you model zone consists lot of furniture's then
make it 30-35 times of zone Volume.

As suggested by Jacob please consider bit larger geometry.

Regards,

Manoj

On Fri, Mar 11, 2016 at 6:25 PM, <freppelw at noirot.fr> wrote:

> Hi everyone,
>
> I'm currently learning the use of TRNFLOW. To make it simple, I designed a
> 1m3 box with SketchUp.
> In TRNSYS:
> - Firstly I just observed the air temperature inside the box without any
> incoming thermal perturbation
> - Secondly I set up a large opening (window) with an opening schedule.
>
> The result is:
> In the second case, I do observe a dramatic decrease of the temperature
> inside the box when the window is opened. However, right after it is
> closed, the temperature "jumps" to the temperature in the first case. To
> say it briefly, when I put the two graphs together, the only difference is
> when the window is opened. For the rest, it matches almost perfectly.
>
> It shouldn't be like that since the outside air temperature is far below
> the inside temperature. I expected the same temperature in both cases
> before the windows is opened. Then a dramatic decrease of the temperature
> when the window is opened. And after closing the window, I expected the
> temperature to slowly decrease according to the outside air temperature,
> keeping a temperature difference between the two cases.
>
> Do you have any idea of the problem?
> (there is not heating in my model)
>
> Wirich Freppel
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at lists.onebuilding.org
> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>



-- 
*Office Address:-*

*Dr. Manoj Kumar Singh*
*JSPS Postdoctoral Fellow*
*Ex-Postdoctoral Fellow, University of Liege*
*Institute of Industrial Science (IIS),*
*Building C, 4th Floor, Room Number Cw 404, Ooka Lab,*
*The University of Tokyo, 4-6-1 Komaba Meguro-ku*
*153-8505, Tokyo, Japan.*


Alternate E mail :-  mksingh at iis.u-tokyo.ac.jp
                              mksinghiitd at gmail.com
                              mksinghtu at rediffmail.com



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