<!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 6.00.6000.16441" name=GENERATOR></HEAD> <BODY> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007>Dear Mr. Laouadi,</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007></SPAN></FONT> </DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007>I checked your numeration with my model. I have 2 layers of concret:</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007></SPAN></FONT> </DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007>1 layer: concret</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007>2 layer: concret with pipes placed in the centre</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007></SPAN></FONT> </DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007>With your numeration the pipes are at node 5, but my model does not work with node 5, it works with node 4.</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007></SPAN></FONT></SPAN></FONT><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007></SPAN></FONT> </DIV> <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007>After doing some research in the book of Mr. Clark and the thesis of Mr. Nakhi it is clear:</SPAN></FONT></DIV> <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007>"Each layer of material is represented by two surface nodes and one central node. The two surface nodes at the layer interface are combined into one heterogeneous control volumen represented by a central node." (Nakhi)</SPAN></FONT></DIV> <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007></SPAN></FONT> </DIV> <DIV><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007>That means for my model</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007>Layer 1: node 1 (surfac in contact with ground or air), node 2 (centre), node 3 (surface in contact with layer 2)</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007>Layer 2: node 3 (surface in contact with layer 1), node 4 (centre with pipes), node 5 (surface in contact with air)</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007></SPAN></FONT> </DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007>Best regards</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007>Monika</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=514203708-25052007></SPAN></FONT> </DIV></SPAN></FONT></DIV></SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2></FONT><FONT face=Arial color=#0000ff size=2></FONT><BR></DIV> <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left> <HR tabIndex=-1> <FONT face=Tahoma size=2><B>From:</B> Laouadi, Aziz [mailto:Abdelaziz.Laouadi@nrc-cnrc.gc.ca] <BR><B>Sent:</B> Wednesday, May 09, 2007 3:46 PM<BR><B>To:</B> Hall Monika; esp-r@lists.strath.ac.uk<BR><B>Subject:</B> RE: [esp-r] "slab-on-grade hydronic floor" to activate concret slabs<BR></FONT><BR></DIV> <DIV></DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2>Dear Monika,</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2>The "injection node number" means the node in the construction layer where heat is injected in or retrieved from (in other words, the position of the water pipe in the layer).  Note that ESP-r uses three nodes per construction layer and the node numbering starts from the exterior.</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2>Example: insulated slab on grade:</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2>Layer 1- insulation in contact with ground: node 1 (surface in contact with ground, 2 (centre) and 3 (surface in contact with slab).</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2>Layer 2-concrete slab in contact with interior environment: <SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2>node 4 (surface in contact with insulation, 5 (centre) and 6 (surface in contact with room air).</FONT></SPAN></FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2><SPAN class=140053213-09052007></SPAN></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2><SPAN class=140053213-09052007>So if pipes are placed in the centre of slab, the injection node number will then be 5.</SPAN></FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2><SPAN class=140053213-09052007></SPAN></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2><SPAN class=140053213-09052007>Note, you may add additional layers on top of slab, or you may sub-divide a thick slab into a number of sublayers to get more accurate results.  In this case, just follow the node numbering as explained above or in ESP-r manual.</SPAN></FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2><SPAN class=140053213-09052007></SPAN></FONT></SPAN> </DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2><SPAN class=140053213-09052007>I hope this helps.</SPAN></FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=140053213-09052007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV> </DIV> <DIV align=left><FONT face=Arial color=#0000ff size=2><SPAN class=140053213-09052007>A. Laouadi</SPAN></FONT></DIV> <DIV> </DIV><BR> <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left> <HR tabIndex=-1> <FONT face=Tahoma size=2><B>From:</B> esp-r-bounces@lists.strath.ac.uk [mailto:esp-r-bounces@lists.strath.ac.uk] <B>On Behalf Of </B>Hall Monika<BR><B>Sent:</B> Wednesday, May 09, 2007 7:40 AM<BR><B>To:</B> esp-r@lists.strath.ac.uk<BR><B>Subject:</B> [esp-r] "slab-on-grade hydronic floor" to activate concret slabs<BR></FONT><BR></DIV> <DIV></DIV> <DIV><FONT face=Arial size=2></FONT><FONT face=Arial size=2></FONT> </DIV> <DIV><SPAN class=666320911-09052007><FONT face=Arial size=2>Dear esp-r users,</FONT></SPAN></DIV> <DIV><SPAN class=666320911-09052007><FONT face=Arial size=2></FONT></SPAN> </DIV> <DIV><SPAN class=666320911-09052007><FONT face=Arial size=2>I use the plant component "slab-on-grade hydronic floor" to activate concret slabs. Does anybody know what the parameter " Injection node number (integer)" means? </FONT></SPAN></DIV> <DIV><SPAN class=666320911-09052007><FONT face=Arial size=2></FONT></SPAN> </DIV> <DIV><SPAN class=666320911-09052007><FONT face=Arial size=2>I down loaded the report from Mr Laouadi:</FONT></SPAN></DIV> <DIV><SPAN class=666320911-09052007><FONT face=Arial size=2>"Development of a radiant heating and cooling model for building energy simulation software", but I did not found what it could be.</FONT></SPAN></DIV> <DIV><SPAN class=666320911-09052007><FONT face=Arial size=2></FONT></SPAN> </DIV> <DIV><SPAN class=666320911-09052007><FONT face=Arial size=2>It would be nice, if somebody could help me.</FONT></SPAN></DIV> <DIV><SPAN class=666320911-09052007><FONT face=Arial size=2></FONT></SPAN> </DIV> <DIV><SPAN class=666320911-09052007><FONT face=Arial size=2>Best regards</FONT></SPAN></DIV> <DIV><SPAN class=666320911-09052007><FONT face=Arial size=2>Monika</FONT></SPAN></DIV></BODY></HTML>