<div dir="ltr">
<div>Manish Keswani,<br></div><div><br></div><div>Your National Lab colleagues at LBNL have been investigating improved energy efficiency of cleanrooms for many years.</div><div>I encourage you to communicate with them directly <br></div><div><br></div><div>See:<br></div><div><a href="https://hightech.lbl.gov/cleanrooms">https://hightech.lbl.gov/cleanrooms</a></div><div><br></div><div>Sample publication from Energy Technologies Area:<br></div><div><a href="https://eta.lbl.gov/publications/cleanroom-energy-efficiency-metrics">https://eta.lbl.gov/publications/cleanroom-energy-efficiency-metrics</a></div><div><a href="https://eta.lbl.gov/publications/energy-efficiency-strategies">https://eta.lbl.gov/publications/energy-efficiency-strategies</a></div><div><br></div><div>Bill Flounders</div><div>UC Berkeley</div>

</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Sep 15, 2020 at 8:34 AM Manish Keswani <<a href="mailto:manish.keswani01@gmail.com">manish.keswani01@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Dear all, </p><p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"><br></p><p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">We are currently evaluating our exhaust and
makeup air systems at LLNL and looking into ways that will improve the efficiency and/or
optimize the flow rates so that lower CFM is needed. Our solvent stations/wet benches
and gas cabinets use about 50% and 25% of exhaust, resp.   </p>

<p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"> </p>

<p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">It seems that one may be able lower the exhaust needs by optimizing
the exhaust flow during opening/closing of the gas cabinet doors or fume hood sash using
suitable sensors or by determining the actual flow using tracer gas testing, which
could be up to 50% lower than the standard flow.</p>

<p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"> </p>

<p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Does anyone have any experience with this and suggestions on how to approach this?</p><p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"><br></p><p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Thanks in advance.</p><p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"><br></p><p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Regards,</p><p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Manish</p><p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"><br></p><p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Manish Keswani</p><p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Center for Micro and Nano technology</p><p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Lawrence Livermore National Laboratory</p><p class="MsoNormal" style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"><br></p></div>
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