<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.2900.2963" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Verdana size=2>Hello Olli & all,</FONT></DIV> <DIV><FONT face=Verdana size=2></FONT> </DIV> <DIV><FONT face=Verdana size=2>I went into the constructions database & created an item made of a single layer of air (so that air can move through the gap like a real hole would) but it says that it's not allowed....</FONT></DIV> <DIV><FONT face=Verdana size=2></FONT> </DIV> <DIV><FONT face=Verdana size=2>So does that mean that it's not possible to model heating the top floor of my house as a consequence of the heated air in the lower floor rising up the stairwell? Does heat just not move around in the model like this....? </FONT></DIV> <DIV><FONT face=Verdana size=2></FONT> </DIV> <DIV><FONT face=Verdana size=2>What should I do for this?</FONT></DIV> <DIV><FONT face=Verdana size=2></FONT> </DIV> <DIV><FONT face=Verdana size=2>Thanks,</FONT></DIV> <DIV><FONT face=Verdana size=2>Andrew</FONT></DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=oliver.bucks@club-internet.fr href="mailto:oliver.bucks@club-internet.fr">Oliver Bucks</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=horsford@eastlink.ca href="mailto:horsford@eastlink.ca">Andrew Horsford</A> ; <A title=esp-r@lists.strath.ac.uk href="mailto:esp-r@lists.strath.ac.uk">esp-r@lists.strath.ac.uk</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, October 26, 2006 4:57 AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> [esp-r] Re: Connecting two zones with a stairwell</DIV> <DIV><BR></DIV> <DIV><FONT face=Arial size=2>Hello Andrew,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Unless you are examining convection patterns, thermal stratification or other air movement in detail, I don't think you need to be worried about the exact geometry of your stairs. However, It might be a nice idea to include a cube (or 'wedge') of roughly the same mass and surface area as your stairs in the zone you'll create to represent your stairwell. This is simply a matter of creating the vertices you want inside the zone concerned and creating surfaces to represent a closed cube/wedge 'staircase' inside your zone.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>You can't have 'holes' in your zones' peripheries. You will have to create a 'fictive' material and construction. This fictive material must have very low density, specific heat, and absorbtion. It must have high permeability, IR emissivity....  It should be transparent too. As if it isn't there.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>The construction you create using the fictive material will make up the surface between the 1st floor and the ground floor - your 'hole'.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Olli</FONT></DIV> <P> <HR> <P></P> <DIV>_______________________________________________<BR>esp-r mailing list<BR>esp-r@lists.strath.ac.uk<BR><A href="http://lists.strath.ac.uk/mailman/listinfo/esp-r">http://lists.strath.ac.uk/mailman/listinfo/esp-r</A></DIV> <DIV><FONT face=Verdana size=2></FONT> </DIV> <DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=horsford@eastlink.ca href="mailto:horsford@eastlink.ca">Andrew Horsford</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=esp-r@lists.strath.ac.uk href="mailto:esp-r@lists.strath.ac.uk">esp-r@lists.strath.ac.uk</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, October 25, 2006 6:19 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> [esp-r] Connecting two zones with a stairwell</DIV> <DIV><BR></DIV> <DIV><FONT face=Verdana size=2>Hello all,</FONT></DIV> <DIV><FONT face=Verdana size=2></FONT> </DIV> <DIV><FONT face=Verdana size=2>I'm new to ESP-r and as a first run I thought I'd make a model of my house and so far, so good: the ground floor is complete as far as walls, windows & doors. I now want to add the stairway from the ground floor to the top floor but I'm not sure how to proceed. Should I just create a hole in the ceiling/floor and put in a 45º slope leading up?</FONT></DIV> <DIV><FONT face=Verdana size=2></FONT> </DIV> <DIV><FONT face=Verdana size=2>I know it might not really matter & in terms of heat-flow it's probably the same as a hole in the ceiling/floor, but I wanted to check in case there's some standard way of doing this.....</FONT></DIV> <DIV><FONT face=Verdana size=2></FONT> </DIV> <DIV><FONT face=Verdana size=2>Thanks for your help,</FONT></DIV> <DIV><FONT face=Verdana size=2>Andrew Horsford</FONT></DIV> <DIV><FONT face=Verdana size=2></FONT> </DIV> <DIV><FONT face=Verdana size=2>ASPAM=antispamwpk42</FONT></DIV> <P> <HR> <P></P>_______________________________________________<BR>esp-r mailing list<BR>esp-r@lists.strath.ac.uk<BR>http://lists.strath.ac.uk/mailman/listinfo/esp-r</BLOCKQUOTE></DIV></BLOCKQUOTE></BODY></HTML>