<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="2050" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Claire,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>It sounds like you are using IES but you mention "other packages" as well so I thought I'd outline the ways that ground water cooling through hydronic slabs can be modelled in DesignBuilder EnergyPlus.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>1. In DesignBuilder v4.5 there is an HVAC template which allows you to directly model this system with water from a ground borehole flowing through a HX component which cools water flowing through a second circuit into ceiling surfaces. You get the cooling injected into exactly the right part of the surface and slab thermal mass is included. You just have to load the template and set the position of the pipes in your ceiling slab construction. You can select a template with the number of boreholes or use water from a lake. For later more detailed design work you can refine the ground loop design using a third party tool such as GLD or GLHEPRO.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><img width=691 height=761 id="Picture_x0020_1" src="cid:image003.jpg@01D0A9A9.9A0E73F0"></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Other simpler options include:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>2. As suggested by others you can use a dummy chiller setting a fuel code to ignore the fuel consumption.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>3. Use district cooling.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Options 2 and 3 would allow you to set a fixed 12degC for supply temperature. Option 1 would calculate the correct supply temperature based on the capacity of the ground water supply.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I hope it helps.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Andy<o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Andy Tindale<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Managing Director </span><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#7F7F7F'>I</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'> Tel: +44 (0)1453 755500 </span><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#7F7F7F'>I</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'> </span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="mailto:andy.tindale@designbuilder.co.uk"><span style='color:blue'>andy.tindale@designbuilder.co.uk</span></a></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#7F7F7F'> <o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:6.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>DesignBuilder Software Ltd</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>, 1st Floor, Clarendon Court,<b> </b>54-56 London Rd<b>,</b> Stroud<b>,</b> GL5 2AD<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#7F7F7F'><a href="http://www.designbuilder.co.uk/"><span style='color:blue'>www.designbuilder.co.uk</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:2.0pt;font-family:"Calibri","sans-serif";color:#7F7F7F'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#7F7F7F'><img border=0 width=163 height=31 id="Picture_x0020_0" src="cid:image006.jpg@01D0A9A9.9A0E73F0" alt=DesignBuilderIcon02052015.png></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Bldg-sim [mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Claire Das Bhaumik<br><b>Sent:</b> Wednesday, June 10, 2015 3:02 PM<br><b>To:</b> bldg-sim@lists.onebuilding.org<br><b>Subject:</b> [Bldg-sim] Modelling groundwater cooling via concrete slab<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>I'm looking for the most suitable approach for modelling groundwater cooling in a thermal model. It's proposed to have pipes embedded in a concrete ceiling with groundwater flowing through them. The groundwater supply temp will be fixed at around 12degC. </span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><o:p> </o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif"'>I'm using IES software but I expect the possible approaches would be similar with most packages.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><o:p> </o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif"'>I could either use a simplified approach calculating the cooling capacity from the flow rate and temperature difference, or use a detailed systems modelling approach. I want something fairly quick but reasonably accurate (don't we all?!) as it's a preliminary study.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><o:p> </o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif"'>Thanks,</span><o:p></o:p></p></div><p class=MsoNormal><br clear=all><o:p></o:p></p><div><div><div><div><div><p><b><span style='color:#262626'>Dr Claire Das Bhaumik CEng FCIBSE</span></b><o:p></o:p></p><p><b><span style='font-size:10.0pt;color:#365F91'>Partner - Inkling LLP</span></b><o:p></o:p></p><p><b><span style='font-size:10.0pt;color:#1F497D'> </span></b><span style='font-size:9.0pt;color:#262626'>e: </span><a href="mailto:claire@inklingllp.com" target="_blank"><span style='font-size:9.0pt;color:#262626;text-decoration:none'>claire@inklingllp.com</span></a><o:p></o:p></p><p><span style='font-size:9.0pt;color:#262626'>t: 07950 282800</span><o:p></o:p></p><p><span style='font-size:9.0pt;color:#262626'>w: <a href="http://www.inklingllp.com/" target="_blank"><span style='color:#262626;text-decoration:none'>www.inklingllp.com</span></a></span><o:p></o:p></p><p><span style='font-size:9.0pt;color:#365F91'>Follow us on Twitter: @DasInkling</span><o:p></o:p></p><p><span style='font-size:9.0pt;color:#262626'>Partnership No. OC367619</span><o:p></o:p></p></div></div></div></div></div></div></div></body></html>