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</o:shapelayout></xml><![endif]--></head><body lang=NL link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have a problem regarding trnflow (version 16). I have got to model the following:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>An atrium 2 zones heigh<o:p></o:p></p><p class=MsoNormal>A mechanical ventilation systeem, supply in the bottom zone, exhaust in the topzone (temperature 18 degree celsius)<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I made a simple model: EN – AN – FA – CR – FA - EN<o:p></o:p></p><p class=MsoNormal> Outside – temperature 18 degree – fan into bottom zone – cr between zones - exhaust fan to outside - outside<o:p></o:p></p><div><p class=MsoNormal><span style='mso-fareast-language:NL'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:NL'>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??<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:NL'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:NL'> Crack has a Cs of 1 kg/s at 1 Pa.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:NL'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:NL'>If anyone got any ideas where to look for the solution, please let me know.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:NL'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:NL'>With kind regards,<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='mso-fareast-language:NL'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='mso-fareast-language:NL'>Mariëlle </span><o:p></o:p></p></div></div></body></html>