<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"><base href="x-msg://41/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Arianna,<div><br></div><div>could you give an example with numbers and units for your substitution procedure? What was the ACH@50 Pa result from the measurement? Do you have consumption data from the obviously existing building? What are the dimensions of the single storey house? At 100 m2 heated area you would end up with 300 kWh/(m2 a) which is a lot but not totally impossible depending on climate, window sizes, insulation standard and leakiness.</div><div><br></div><div>Sorry to ask so many questions.</div><div><br></div><div>Best</div><div>Achim</div><div><br></div><div><br></div><div><div><div>On Nov 28, 2013, at 8:37 PM, Arianna Sdei <<a href="mailto:A.Sdei@brighton.ac.uk">A.Sdei@brighton.ac.uk</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div lang="EN-GB" link="blue" vlink="purple" style="font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div class="WordSection1" style="page: WordSection1; "><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">Dear ESP-r community,<o:p></o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">I am trying to set up an air flow network using the measured air flow rate from pressure tests. To do that I am substituting power law flow components to cracks. I have calculated the coefficient a in the equation : Q = a dP ^b using the measured ACH and I am using b=0.66 but when simulating I get a too high heating load (over 30000 kWh/year for a single storey house) . Does anybody know why this happens and if there is another way to use the measured ACH from the pressure tests to set up the infiltration rate using an air flow network? Thank you<o:p></o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">Regards,<o:p></o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">Arianna   <o:p></o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><b><span style="font-size: 14pt; color: rgb(0, 32, 96); ">Arianna Sdei</span></b><span style="color: rgb(0, 32, 96); "><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(0, 32, 96); "> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(0, 32, 96); ">Research Fellow IFORE (Innovation For Renewal)<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(0, 32, 96); "> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(0, 32, 96); ">UNIVERSITY OF BRIGHTON<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(0, 32, 96); "> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(0, 32, 96); ">Moulsecoomb, Lewes Road, Brighton, BN2 4AT<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(0, 32, 96); "> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(0, 32, 96); ">direct line: 0044 (0)2036747268<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><b><span style="color: rgb(0, 32, 96); "> </span></b></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(0, 32, 96); ">mobile: 0044 (0)7981739024<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><b><span style="color: rgb(0, 32, 96); "> </span></b></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div></div><br clear="both">___________________________________________________________<br>This email has been scanned by MessageLabs' Email Security<br>System on behalf of the University of Brighton.<br>For more information see<span class="Apple-converted-space"> </span><a href="http://www.brighton.ac.uk/is/spam/" style="color: purple; text-decoration: underline; ">http://www.brighton.ac.uk/is/spam/</a><br>___________________________________________________________<br>_______________________________________________<br>esp-r mailing list<br><a href="mailto:esp-r@lists.strath.ac.uk" style="color: purple; text-decoration: underline; ">esp-r@lists.strath.ac.uk</a><br><a href="http://lists.strath.ac.uk/mailman/listinfo/esp-r" style="color: purple; text-decoration: underline; ">http://lists.strath.ac.uk/mailman/listinfo/esp-r</a></div></blockquote></div><br><div apple-content-edited="true"> <span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><div><a href="mailto:achim.geissler@intergga.ch">achim.geissler@intergga.ch</a></div><div><br></div><div><br></div></span><br class="Apple-interchange-newline"> </div> <br></div></body></html>