<html> <head> <meta http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <meta name=Generator content="Microsoft Word 11 (filtered)"> <style>  </style> </head> <body lang=EN-US link=blue vlink=purple> <div class=Section1> Hi Susana,   … some thoughts on this:   It mainly depends on what information you are seeking. If ventilation heat loss is what is of interest, IMO you can simply use an ACH by operations file (maybe set the ventilation air temperature to whatever is planned).   If you want a bit detail on what happens to the air (where it goes), then you can model the ventilation with an air flow network (however, if you want to detail your ventilated zone, you will have to split that up into several sub-zones and have dozens of “fictitious” walls … which has (slight) influence e.g. on long wave radiation exchange between the “real” walls of the zone. For large atria, e.g., this method still gives a good idea of what will happen.   Or, last not least, if you are interested in a single not-too-large-and-complicated zone in high detail (air movement or even contaminant distribution), then you will have to set up a (conflated) CFD model. <div>   Best regards   Achim Geissler </div> <div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabindex=-1> </div> From: esp-r-bounces@lists.strath.ac.uk [mailto:esp-r-bounces@lists.strath.ac.uk] On Behalf Of Susana Saiz Alcazar Sent: Thursday, June 21, 2007 3:03 PM To: esp-r@lists.strath.ac.uk Subject: [esp-r] displacement ventilation </div>   <div> Hi everyone, </div> <div>   </div> <div> Someone has any idea of how to model displacement ventilation in esp-r? or if there is any case study in the web I can reviwew? </div> <div>   </div> <div> Thanks a lot </div> <div>   </div> <div> Susana </div> </div> </div> </body> </html>