Re: [TRNSYS-users] Type109-User

[knut.erik.enerstvedt@niva.no]

Dear Christopher Haluf,

I'm not sure if anyone has replied to your
message to the forum yet. Please excuse me if anyone has done so.

I think Type 109 corrects your radiation
data according to your location (longitude and lattitude in your .109-file)
and time of year, to make sure that radiation is zero when the sun is down.
Look for messages in the list file about this. It also might be that Type
109 is interpolating between your constant data and the zero-values at
night, so you get at typically daily behaviour. To read constant weather
data, I think it would be more appropriate to use the Type 9 data reader.

I hope someone will correct me if I am wrong
about Type 109.

Kind regards,
Knut Erik Enerstvedt



<Dear Users,
 
I'm facing problems using Type109-User format.

 
I want to use constant wheater data in order
to understand what is exactly happening at solar thermal collectors. I
studied the TRNSYS manual to get information about the format of the user-wheater-data-file
.109, and I think that I understood all. 
 
To get constant wheater data, I set the ambient
temperature to constant 20°C, and I also set the diffuse horizontal radiation
IDIFF_H and the global horizontal radiation IGLOB_H to constant values
(for example 1000 W/m² and 500 W/m²).
 
When I run the simulation, I get strange
results. Even though I set the radiations to constant values, the values
in the diagram of the results are not constant (they show a typically daily
behavior), but the collector outlet temperature and the usefull energy
gain are constant. It seems to me, that there is no dependance between
the radiation and the outlet temperature/energy gain...  
 
I attached the .tpf and my .109 files for
you!
 
 
 
 
Could somebody please tell me if I use the
.109-user-file the right way and if not, explain me what I do wrong?
 
Thanks in advance!>

Mit freundlichen Grüßen / Kind regards
Christopher Haluf
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