Eleni,
You can have some of the parameters for Type
77 from the NASA Surface Meteorology and Solar Energy database. You can have
the annual average, monthly average and annual amplitude of soil surface
temperature that you can use as inputs to Type 77 for any location around the
world. I think you will need to register before you can have access to the
database.
Best regards
Abdullahi
Abdullahi Ahmed (BSc. MSc.) Postgraduate
researcher
School of the Environment
University of Brighton
Cockcroft Building
Lewes Rd.
Brighton
BN2 4GJ
Tel: +44 01273 643455
-----Original Message-----
From: David Bradley
[mailto:bradley@tess-inc.com]
Sent: 08 December 2008 18:53
To: eleni ampatzi
Cc: trnsys-users@cae.wisc.edu
Subject: 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
_______________________________________________
TRNSYS-users mailing list
TRNSYS-users@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@tess-inc.com
Web Pages: http://www.tess-inc.com and http://www.trnsys.com
***********************************************************************