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Re: [TRNSYS-users] type 703 parameters

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

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