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<p>Valeria,</p>
<p> Thanks for the additional information. I'm afraid I am not aware
of such a component but I will certainly put it on our list of
components that would be interesting to write. If you find (or
already have) any papers that discuss the dynamics and performance
of steam ejectors, I'd certainly be interested in reading them.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 11/22/2019 07:27, Valeria
Badalamenti wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAJtz4G4tRocXdBQAdmOjeAM0=CS+FnavLtgf5_GtSbabqTtjRg@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<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
style="font-family:sans-serif;font-size:12.8px;margin-bottom:0cm"
type="disc">
<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 style="margin:0cm 0cm 0.0001pt
34.85pt;line-height:normal;font-size:11pt;font-family:calibri,sans-serif"
align="left"><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"><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"
moz-do-not-send="true">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>
<fieldset></fieldset>
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</blockquote>
<pre cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a href="mailto:d.bradley@tess-inc.com" target="_blank" rel="noreferrer" moz-do-not-send="true">d.bradley@tess-inc.com</a>
<a href="http://www.tess-inc.com" target="_blank" rel="noreferrer" moz-do-not-send="true">http://www.tess-inc.com</a>
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</blockquote>
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</blockquote>
<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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