[TRNSYS-users] type 703 parameters

[David Bradley]

Eleni,
  Sorry for the delay in getting back to you. I think that "undisturbed" 
in this case is just referring to the temperature of soil far enough 
away from the building that it is not affected by anything other than 
the time of year and depth. You can use the Type77 Ground Temperature 
model to get the soil temperature. A good guess for the average annual 
deep earth soil temperature is the average annual air temperature. The 
amplitude is the difference between the maximum average monthly 
temperature and the minimum average monthly temperature (you should be 
able to figure that out from the data file). The shift is the day on 
which the minimum temperature occurs and again should be obtainable from 
the weather file.
Kind regards,
 David


eleni ampatzi wrote:
> Dear All,
>
> I am using type 703 and I have a question regarding parameters 8,9,10 
> which refer to the surface temperature- temperature of undisturbed 
> soil. What does 'undisturbed soil' mean exactly? I can get 
> measurements from local weather stations regarding the soil 
> temperature at various depths; hourly values measured at 10cm depth, 
> daily values taken at 9am for 30cm and 100cm depth.
>
> If I use average soil temperature measurements for 10cm depth, would 
> that be a correct dataset to use in orfed to derive mean surface 
> temperature, amplitude of surface temperature and day of min surface 
> temperature? Would surface temperature differ a lot from the soil 
> temperature at 10cm? Thank you in advance
>
> Best Regards
>
> Eleni
>
> -- 
> Eleni Ampatzi
> PhD Candidate
> Welsh School of Architecture
> Cardiff University
> ------------------------------------------------------------------------
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu
> https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users
>   

-- 
***********************************************************************
Thermal Energy System Specialists (TESS), LLC 
David BRADLEY                      22 N. Carroll Street - Suite 370 
Partner                            Madison, WI 53703 
                                   USA
P: +1.608.274.2577 
F: +1.608.278.1475
E-mail: bradley at tess-inc.com 
Web Pages:  http://www.tess-inc.com    and      http://www.trnsys.com

***********************************************************************

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20081208/2252c812/attachment-0005.htm>