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Re: [TRNSYS-users] Questions about new component



Artemi,
 
If you have tmy2, why do you want to go to 109? We (Transsolar) can create 109 files, but the scripts to do so aren't something I can easily send you. What city are you using? Maybe I have it already. I doubt Meteonorm can create a 109. A "109 weather file," as far as I know, only exists in the Trnsys world. Just change parameter 1 of type 109 to 2 instead of 1 and it will know it's getting a tmy2 file and not a 109.
 
Variable cycles are how some Types handle multiple sets of variables. Type 109, for example, can process various surface orientations to create the total, direct, and diffuse radiation levels. The calculation is the same for each of these, so the type cycles (loops) for each input orientation, and outputs all the results grouped in the same order as they were input.
 
Blocking all solar radiation to the roof might be as simple as saying that it's 100% shaded. Or just override the usual horizontal radiation input and set it equal to zero. I don't think you can set the roof surface temperature directly, but you can say that the temperature "outside" this particular surface is equal to an input, connected to the output of your component - as if there were different ambient conditions for the roof, rather than the normal outdoor temp.
 
I hope this helps.
 
-Cramer
 

J. Cramer Silkworth

Transsolar Climate Engineering

Technical consulting for energy efficiency and environmental quality in buildings.

145 Hudson Street

Suite 402

New York, NY 10013

Office: 212-219-2255

silkworth@transsolar.com



From: Artemi Spanaki [mailto:spanakiart@hotmail.com]
Sent: Tuesday, January 13, 2009 5:52 AM
To: trnsys-users@engr.wisc.edu; techsupport@tess-inc.com; software@cstb.fr
Subject: [TRNSYS-users] Questions about new component

Dear David and TRNSYS users.

 

I would like to ask you some things in order to solve some of my problems, in a simulating procedure.

 

I used “type109”.user instead of “type109.TMY2”. How can I convert a weather data file of *.tm2 to a *.109? Is it possible to create a 109 file using the Meteonorm software?

 

What is the meaning of the creation of a cycle of variables? For example getting the weather data in a cycle means that n new data are taken again and again?

 

 I created a new component for passive cooling through building’s roof. Since the new component is a roof by its own, how can I describe that the roof of the *.bui file does not takes any solar radiation? The new component has a variable named “roof temperature”. How can I set this value as equal to the roof temperature in *.bui file?

 

Is there any way to access the kernel of my project in simulation studio in order to check my model?

 

Wishing you a Happy New Year!

 

Yours sincerely

 

Artemi Spanaki



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