Toni,
I am not aware of a component that will read ahead in a weather
data file. You could of course modify Type15 to do so (or write
your own component to do so). You might also be able to run a
simulation in which you read the weather data and write back out
the critical pieces of it that you want (ambient temperature and
solar). Then modify that file so that it is shifted by 24 hours.
From then on you can use a Type9 to read the shifted weather data
in parallel with whatever component you're using to read the
present weather data. There are components available that will
give you a running average over the past N hours. Because the data
is shifted, what it thinks of as the "past" N hours are in fact
the "next" N hours.
If you do this, be careful not to run the shifted solar data
through a radiation processor (such as Type16) but instead deal
only with the raw (uninterpolated) data. The reason is that Type16
uses the present simulation time to determine the sun's present
position. If you run the modified solar through a radiation
processor you'll be using tomorrow's data with today's sun
position.
Also a slight caution in that you're going to get a perfectly
accurate "forecast" of the next day's weather. Once or twice in my
experience I have seen days when the forecasted weather did not
turn out quite the way it was supposed to. You might want to add
some stochastic element to your forecast so that it is not always
100% accurate. There are some random number generator components
in the TESS Utility library that can help in this regard (though
not directly)
kind regards,
David
On 06/30/2022 10:16, Toni Calabrese via
TRNSYS-users wrote:
Hi,
for
a project we are interested on weather forecast analysis in
ordert o increase PV self consumption. I would like to
understand if there is the possibility (with a Type?) to
calculate in Trnsys average values of variables (ambient
temperature or solar irradiation) looking in the future
(24h+ for example). What I would need is in each timestep to
have the possibility to compare a variable with the average
of that variable considering the next N timesteps. Someone
could help me?
Toni
Calabrese,
MSc.
Wissenschaftlicher
Projektleiter
toni.calabrese@spf.ch |
toni.calabrese@ost.ch
T
+41 58 257 4827
SPF
Institut für Solartechnik
OST
– Ostschweizer Fachhochschule
Oberseestr.
10 | CH-8640 Rapperswil | Switzerland |
www.spf.ch |
www.ost.ch
_______________________________________________
TRNSYS-users mailing list
TRNSYS-users@lists.onebuilding.org
http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
--
***************************
David BRADLEY
Principal
Thermal Energy System Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
d.bradley@tess-inc.com
http://www.tess-inc.com
http://www.trnsys.com