<!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 6.00.2900.3157" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Dear Hugo,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I have 'dived' back into swimming pool modeling. The introduction of evaporative surfaces into a model is done in the following manner. If any other users have additional information, I would be very happy to hear it.......</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>1) Once the model is up and running (simulated without an evaporative surface and without warning errors) open the "active materials" menu.</FONT></DIV> <DIV><FONT face=Arial size=2>Browse/edit/simulate -> Composition -> active materials. </FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Create a special component file. </FONT></DIV> <DIV><FONT face=Arial size=2>-> Add/delete item </FONT></DIV> <DIV><FONT face=Arial size=2>->accept the special materials database filename provided (/usr/esru/esp-r/databases/mscomp.db1) </FONT></DIV> <DIV><FONT face=Arial size=2>-> click on "phase change materials" - (nb. I have version 10.12 and nothing exists under the "evaporative surfaces menu) and here you can select "evaporating surfaces" </FONT></DIV> <DIV><FONT face=Arial size=2>-> select "evaporative_surf" </FONT></DIV> <DIV><FONT face=Arial size=2>-> give it a name </FONT></DIV> <DIV><FONT face=Arial size=2>-> enter the calculation mode ( up till now, I generally accept the default value (1). I have not seen any differences in zone resultant temperatures when entering 2 (or 3) as the calculation mode.I have tried to understand the code, but cannot find out what the different calculation modes are)</FONT></DIV> <DIV><FONT face=Arial size=2>-> Select zone, surface, surface layer and node which will become evaporative (higher node number = closer to the 'inside' face).</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I have had many, many horrible results :  </FONT></DIV> <DIV><FONT face=Arial size=2>- no temperatures, </FONT></DIV> <DIV><FONT face=Arial size=2>- temperatures below absolute 0 (a calculated, steady -2.1 billion °C ), </FONT></DIV> <DIV><FONT face=Arial size=2>- temparatues above 330°C and below -15°C either side of a shared evaporative surface, </FONT></DIV> <DIV><FONT face=Arial size=2>- simulations not starting - warning messages :  </FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>"MZVAPC : for zone.....the computed relative humidity of........has been reset to zero"</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>"Psat01 :  Small saturation vapour pressure"</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>- simulation starting but cutting out halfway through a week...</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>The thickness of the layer in which the evaporative surface is implanted seems very important. The surface has to be implanted on an exterior surface (obviously), either 'inside' face or 'other' face.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>You can also change the convection coefficient of your surface</FONT></DIV> <DIV><FONT face=Arial size=2>Browse/edit/simulate -> composition -> convection calculations.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>You may either choose to allocate a certain calculation type per interior surface or to force the convection coefficient on a surface. I have previously used values from "Energy Simulation in Building Design", J. A. Clarke 2nd edition, table 7.20, pg 261.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Wishing you luck, and hoping that other users have more experience than myself,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Olli Bucks</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>ps. a note in the code does point out that the evaporative surface module is not perfect, and has only been "roughly verified".</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <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=hugolacerda@gmail.com href="mailto:hugolacerda@gmail.com">Hugo Lacerda</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> Tuesday, September 18, 2007 4:43 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> [esp-r] Swimming Pool</DIV> <DIV><BR></DIV>Dear all,<BR><BR>I have a Version 11.3 of the ESP-r installed on Fedora Core 6  operating system.<BR><BR><FONT face="Arial, Helvetica, sans-serif">I need to include indoor swimming pool in my model.<BR><BR>After define the</FONT><SPAN name="st"></SPAN><SPAN name="st"> </SPAN>"evaporative surface" in the "zone controls - period data" sub-menu and a evaporative surface in "special components" I would like <FONT face="Arial, Helvetica, sans-serif">to now how to link them and how insert the swimming pool in the model and </FONT> define the parameters.<BR><BR>How to proceed?<BR><BR>Thank you very much!<BR><BR>Best regards,<BR><SPAN></SPAN><BR>Hugo Lacerda </BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>