Dear Juan,
With the defined network, you can calculate the flow in either of two cases:
- external pressure; induced by wind. For this calculation you need cimatic data including wind speed, and you need to define pressure- coefficients at each external surface
- due to thermal buoyancy; in order to get a (small) flow the cracks should be at different heights to induce a thermal stack.
In order to get a flow large enough to ‘cool’ the hot zone you probably need a ‘large opening’ instead of a crack.
(Furthermore: don’t forget to use Type56TRNFLOW instead of the standard Type56, and don’t forget to switch the input ‘TRNFLOW’ to 1.)
regards, Arie
-----Oorspronkelijk bericht-----
Van: trnsys-users-bounces@engr.wisc.edu [mailto:trnsys-users-bounces@engr.wisc.edu] Namens juan.jesus@faimevi.eu
Verzonden: dinsdag 6 maart 2007 23:32
Aan: trnsys-users@engr.wisc.edu
Onderwerp: [TRNSYS-users] Help with TRNSFLOW
Hello, I am Juan jesús and write to you from Spain.
I need help with TRNSFLOW. To begin, for some reason the example that
has the program has some mistake and I would like that you were
sending yours this one and if you can someone more in order that I was
helping myself.
I have started creating a simple example, after reading the manuals,
but I have problems to do a coherent net.
Only I want to take advantage of the air of the face North of a
building to cool that of the face South.
The net that I have created consists in:
External Node + Crack + Thermal zone A + Crack + Thermal zone B +
Crack + External Node....
In a beginning what I do is to simulate without defining the air net
and seeing the values of the temperatures in the zones. And later I
realize this net of air flow and observe that there are no variations.
That I am doing badly?. Thank you very much
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