<div dir="ltr">When we built the addition to our existing fab, we looked into something that would allow us to ride through the 1-10 second power interruptions that seemed to plague this area. We designed our entire power distribution grid for the new addition around a flywheel based system, but as of yet, have never proceeded any farther with the implementation. The three biggest hurdles are cost (at the time it was about $1K/Kw), sizing the unit (both in capacity, and physical location), and finally determining which equipment, or parts of equipment, should be backed up. We were looking at a 500Kw unit, which wasn't large enough to back up everything, but it would have captured all of the computer systems, cryo pumps, and assorted electronic hardware. To back up (ride through) for the entire new facility, we would have needed somewhere between 800-900 Kw. We've been on-line with the new facility since about 2010, and have managed OK without the fly wheel system, however we have added local UPS units at critical locations. The flywheel system would have only helped in the new fab areas. We would still have had about half of the facility (the original fab areas) unsupported.<div><br></div><div>We also have a 60Kw UPS that backs up our life safety systems (computers, gas detection, several dry pumps, some abatement), which is backed up by one of our natural gas fired generators.</div><div><br></div><div>We've found, that by instilling a 24/7 technical on-call program (voluntary in participation), we've been able to manage the power disturbance risks, and provide a more cost effective support for the entire fab operation.</div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div>DennisSchweiger</div><div>University of Michigan/LNF</div><div> </div><div>734.647.2055 Ofc<br></div></div></div>
<br><div class="gmail_quote">On Tue, Feb 24, 2015 at 7:56 PM, <span dir="ltr"><<a href="mailto:julia.aebersold@louisville.edu" target="_blank">julia.aebersold@louisville.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal">Hello everyone. Due to the recent weather here in the Midwest we have experienced several instances of power surges due to utility transformers either blowing up or other issues. As a result we have experienced some damage to our equipment.
I am thinking of pursuing a variety of power conditioners to help nullify these harmful events. However, I wanted to tap into our wonderful online resources before dropping any funds.<u></u><u></u></p>
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<p class="MsoNormal">Opinion or other suggestions?<u></u><u></u></p>
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<p class="MsoNormal">Cheers!<u></u><u></u></p>
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<p class="MsoNormal">Julia Aebersold, Ph.D.<u></u><u></u></p>
<p class="MsoNormal">Cleanroom Manager<u></u><u></u></p>
<p class="MsoNormal">Micro/Nano Technology Center<u></u><u></u></p>
<p class="MsoNormal">University of Louisville<u></u><u></u></p>
<p class="MsoNormal">Shumaker Research Building, Room 233<u></u><u></u></p>
<p class="MsoNormal">2210 South Brook Street<u></u><u></u></p>
<p class="MsoNormal">Louisville, KY 40292<u></u><u></u></p>
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<p class="MsoNormal"><a href="tel:502-852-1572" value="+15028521572" target="_blank">502-852-1572</a><u></u><u></u></p>
<p class="MsoNormal"><a href="http://louisville.edu/micronano/" target="_blank"><span style="color:blue">http://louisville.edu/micronano/</span></a><u></u><u></u></p>
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