<div dir="auto"><p style="margin:0cm 0cm 0.0001pt;text-align:justify;line-height:18.0473px;font-size:11pt;font-family:calibri,sans-serif"><span style="font-size:12pt;line-height:19.688px;font-family:'cambria',serif"><br>Hi,</span><span style="font-family:'cambria',serif"></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;line-height:18.0473px;font-size:11pt;font-family:calibri,sans-serif"><span style="font-size:12pt;line-height:19.688px;font-family:'cambria',serif">Thanks for your help.</span><span style="font-family:'cambria',serif"></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;line-height:18.0473px;font-size:11pt;font-family:calibri,sans-serif"><span style="font-size:12pt;line-height:19.688px;font-family:'cambria',serif">I need to model an duble stade ejector that uses steam as a motor fluid and sucks air without moving parts.</span><span style="font-family:'cambria',serif"></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;line-height:18.0473px;font-size:11pt;font-family:calibri,sans-serif"><span style="font-size:12pt;line-height:19.688px;font-family:'cambria',serif">The ejector works continuously and no, it is not necessary to simulate the vacuum chamber.</span><span style="font-family:'cambria',serif"></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;line-height:18.0473px;font-size:11pt;font-family:calibri,sans-serif"><span style="font-size:12pt;line-height:19.688px;font-family:'cambria',serif">My aim is to understand what happens if the flow rate of the incoming steam varies and the conditions of the outgoing steam.</span><span style="font-family:'cambria',serif"></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;line-height:18.0473px;font-size:11pt;font-family:calibri,sans-serif"><span style="font-size:12pt;line-height:19.688px;font-family:'cambria',serif"> </span><span style="font-family:'cambria',serif"></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;line-height:18.0473px;font-size:11pt;font-family:calibri,sans-serif"><span style="font-size:12pt;line-height:19.688px;font-family:'cambria',serif">Process data are:</span><span style="font-family:'cambria',serif"></span></p><ul type="disc" style="font-family:sans-serif;font-size:12.8px;margin-bottom:0cm"><li style="text-align:left;line-height:normal;margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:'calibri',sans-serif"><span style="font-size:12pt;font-family:'cambria',serif">Inlet Air flow rate: 300 m3/h</span></li><li style="text-align:left;line-height:normal;margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:'calibri',sans-serif"><span style="font-size:12pt;font-family:'cambria',serif">Aspiration pressure : 80 mbar</span></li><li style="text-align:left;line-height:normal;margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:'calibri',sans-serif"><span style="font-size:12pt;font-family:'cambria',serif"> Inlet Steam pressure: 11 bar assoluti</span></li><li style="text-align:left;line-height:normal;margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:'calibri',sans-serif"><span style="font-size:12pt;font-family:'cambria',serif"> Inlet Steam flow rate at 1° stade: 330 kg/h</span></li><li style="text-align:left;line-height:normal;margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:'calibri',sans-serif"><span style="font-size:12pt;font-family:'cambria',serif;color:rgb(51,51,51)">Portata al secondo o stadio: Inlet </span><span style="font-size:12pt;font-family:'cambria',serif">Steam flow rate at 2° stade: <span style="color:rgb(51,51,51)"> 1.500 kg/h</span></span></li><li style="text-align:left;line-height:normal;margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:'calibri',sans-serif"><span style="font-size:12pt;font-family:'cambria',serif">Cooling water (only condensate recovery function): <span style="color:rgb(51,51,51)">70 m3/h</span></span></li><li style="text-align:left;line-height:normal;margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:'calibri',sans-serif">tube fouling factor: 0.0003 (m2×h×°C)/kcal</li></ul><p align="left" style="margin:0cm 0cm 0.0001pt 34.85pt;line-height:normal;font-size:11pt;font-family:calibri,sans-serif"><span style="font-size:12pt;font-family:'cambria',serif"> </span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;line-height:18.0473px;font-size:11pt;font-family:calibri,sans-serif"></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;line-height:18.0473px;font-size:11pt;font-family:calibri,sans-serif"><span style="font-family:'cambria',serif">I have no other information, I contacted the supplier but I am waiting.</span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;line-height:18.0473px;font-size:11pt;font-family:calibri,sans-serif"><span style="font-family:'cambria',serif"><br></span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;line-height:18.0473px;font-size:11pt;font-family:calibri,sans-serif"><span style="font-family:'cambria',serif">Thanks,</span></p><p style="margin:0cm 0cm 0.0001pt;text-align:justify;line-height:18.0473px;font-size:11pt;font-family:calibri,sans-serif"><span style="font-family:'cambria',serif">Valeria</span></p><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il mar 22 ott 2019, 19:43 David BRADLEY <<a href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p>Valeria,</p>
<p> I have not come across a steam ejector model but the device
does not seem to be all that complex. I suspect that a model could
be written. Could you give me a bit more information about what
you are trying to model? For instance, do you also need to model
the vacuum chamber? Do you just care about the conditions of the
steam that would come out of the ejector? Is the vacuum pumped
continuously by the ejector or is the ejector only used
periodically?</p>
<p>kind regards,</p>
<p> David</p>
<p> <br>
</p>
<div>On 10/21/2019 06:18, Valeria
Badalamenti via TRNSYS-users wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hi,
<div>i need to model a steam ejector to suction air and make
vacuum. </div>
<div>Is there a type? which types can i use to simulate this
object?</div>
<div>thanks, </div>
<div>Valeria<br clear="all">
<div><br>
</div>
</div>
</div>
<br>
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David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
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