[TRNSYS-users] trnflow16 - atrium

[Mariëlle Nuchelmans]

Hello,

The problem seems to be, that although a lot of air is entering the bottom zone, the pressure doesn't rise in the zone. So there isn't a pressuredifference between the two zone.  The flow through the crack is now temperature driven. If I add heating in both zones, the flow through the crack is almost zero.

Greets,
Marielle

Van: trnsys-users-bounces at cae.wisc.edu [mailto:trnsys-users-bounces at cae.wisc.edu] Namens Mariëlle Nuchelmans
Verzonden: maandag 14 mei 2012 9:39
Aan: trnsys-users at cae.wisc.edu
Onderwerp: [TRNSYS-users] trnflow16 - atrium

Hello,

I have a problem regarding trnflow (version 16). I have got to model the following:

An atrium 2 zones heigh
A mechanical ventilation systeem, supply in the bottom zone, exhaust in the topzone (temperature 18 degree celsius)

I made a simple model:  EN                        - AN                           -  FA                                        - CR                               -    FA                                      -  EN
                                               Outside - temperature 18 degree - fan into bottom zone - cr between zones -  exhaust fan to outside -  outside

Problem is that when I plot the flow through the crack, the results doesn't made sense. For example: the fan delivers 120 kg/h, through the crack goes 25000 kg/h??

Crack has a Cs of 1 kg/s at 1 Pa.

If anyone got any ideas where to look for the solution, please let me know.

With kind regards,

Mariëlle
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