<html dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" id="owaParaStyle"></style>
</head>
<body fpstyle="1" ocsi="0">
<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Good day to you all!
<div><br>
</div>
<div>I am running a simulation which involves a EAHX burried in the ground with the upper surface to ambient air.</div>
<div><br>
</div>
<div>Pipe is at 0.5 m depth, has 0.6 m diameter and I am looking at the effect of length on the outlet temperature.</div>
<div><span style="font-size: 10pt;"><br>
</span></div>
<div><span style="font-size: 10pt;">However, I run into a problem as the outlet air temperature is greater than the soil temprature I believe. </span></div>
<div><span style="font-size: 10pt;"><br>
</span></div>
<div><span style="font-size: 10pt;">The simulation runs with a weather file from Montreal, Canada, and winter temperatures make the soil freeze to 1.2 m in depth. This implies that the soil would be below 0 °C, and the outlet temperature is above that, even
at the end of winter, where it is impossible that the soil has not freezed up.</span></div>
<div><br>
</div>
<div>This lead me to another question:<br>
I have linked the ambient temperature to the upper surface of the EAHX module, with a surface resistance of 20
<div>W/K-m2 (72 kJ/hr-K-m2). Would it be better to use the horizontal irradiation as an energy input instead of the temperature input?</div>
<div><br>
</div>
<div>Any information would be appreciated.</div>
<div><br>
</div>
<div>Thanks in advance and happy new year!</div>
<div><br>
<div style="font-family:Tahoma; font-size:13px">
<div style="font-family:Tahoma; font-size:13px">Olivier Quevillon
<div><br>
</div>
<div>Étudiant à la maîtrise en Génie Mécanique</div>
<div>École de Technologie Supérieure</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>