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Dennis,<br>
<br>
Depends on how you set it up. We use coaxial piping with vacuum in
between<br>
the 316 stainless steel pipes so that any leak is detected. Orbital
welding on both pipes.<br>
We used Applied Energy Systems (AES) for the piping. Our tool <br>
generates H2 on demand and only has 13 liters of actual H2 at any
time.<br>
<br>
Our system has been working for over 6 years with no problem.<br>
<br>
You can contact Steve Buerkel
<a class="moz-txt-link-rfc2396E" href="mailto:sbuerkel@appliedenergysystems.com"><sbuerkel@appliedenergysystems.com></a><br>
for more info on the tubing, fittings, the Hydrogen manifolds and
detection.<br>
<br>
We started out with the generator from day one. So we did not have <br>
to worry about converting. Our facility has a maximum volume
requirement<br>
that led us to two choices: bunker with gas bottles outdoors or
hydrogen generator.<br>
<br>
Leo<br>
<br>
On 7/18/2012 3:37 PM, Grimard, Dennis wrote:
<blockquote
cite="mid:ECD8F19EEE3937469CE93D327FC5790922FAFB78@its-embx-02.adsroot.itcs.umich.edu"
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<p class="MsoNormal">All:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have been watching the discussion
regarding H2 generators. Although I agree with most of what
has been said I worry about being able to shut off the
generator in case of a leak. The generator does not know that
it is delivering into a leak and unless the leak is detected
then the generator will continue pumping to that leak. Adding
detectors is not the solution. H2 detectors are difficult to
place such that they will pick up a leak. Do you add
detectors at every possible leak point? Add in the high
velocities of the cleanroom and I hesitate to change from
bottles to generators.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">When considering the costs, you also have
to consider the cost of the added detectors … which are not
cheap …<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dennis Grimard, Ph.D.<o:p></o:p></p>
<p class="MsoNormal">Managing Director<o:p></o:p></p>
<p class="MsoNormal">Lurie Nanofabrication Facility<o:p></o:p></p>
<p class="MsoNormal">1246D EECS Blding<o:p></o:p></p>
<p class="MsoNormal">1301 Beal Avenue<o:p></o:p></p>
<p class="MsoNormal">Ann Arbor, MI 48109-2122<o:p></o:p></p>
<p class="MsoNormal">(734) 368-7172 Cell<o:p></o:p></p>
<p class="MsoNormal"><a class="moz-txt-link-freetext" href="http://www.lnf.umich.edu">http://www.lnf.umich.edu</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<pre class="moz-signature" cols="72">--
Leonidas E Ocola, PhD
Center for Nanoscale Materials
Argonnne National Laboratory
Bldg 440, Rm A129
9700 South Cass Avenue, Argonne, IL 60439
Ph: 630-252-6613
Fax: 630-252-5739</pre>
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