<div dir="ltr">Hi Andrew,<div><br></div><div><div style="font-family:arial,sans-serif;font-size:12.8px">I'm the collection manager of Genomic Resources at the University of Alaska Museum. We currently have nine cryovats and run the Cryomech LNP120 generator (120 liters per day). The 120L plant has a 300 L collection dewar. We ran for several years, the LNP40 (40L per day) and that was about maxed out with three cryovats. I would encourage you to go with a larger plant or if possible two medium sized plants. The biggest difference is price and cooling of the unit - air-cooled or water-cooled generator. The LNP40 was air-cooled, and the LNP120 is water cooled (only option for the LNP120). I believe there is an even bigger size now. Both have their pluses and minuses. The water-cooled required us to plumb it into our buildings chilled water. Air-cooled meant that the room got too hot and had to be heavily air-conditioned. <a href="http://www.cryomech.com/" target="_blank">Cryomech</a> could help you determine which would be best for you. <br></div><div style="font-family:arial,sans-serif;font-size:12.8px"><br></div><div style="font-family:arial,sans-serif;font-size:12.8px">The university I'm at uses Cryomech since our refrigeration techs on campus are trained to do maintenance work and the maintenance work is super simple. There is annual maintenance required and is about $1K. Currently, our generator is currently in New York getting repairs hence why I suggest having two just in case one goes down. Luckily, there are several units on campus that allow me to use swipe LN2 while our plant is down.</div><div style="font-family:arial,sans-serif;font-size:12.8px"><br></div><div style="font-family:arial,sans-serif;font-size:12.8px">I would also suggest looking into Stirling (<a href="https://www.stirlingcryogenics.eu/en/products/liquid-nitrogen-production-systems" target="_blank">https://www.stirlingcryogenics.eu/en/products/liquid-nitrogen-production-systems</a>) for another brand of LN2 generators. I don't have any experience with them but the Museum of Southwestern Biology has one.</div><div style="font-family:arial,sans-serif;font-size:12.8px"><br></div><div style="font-family:arial,sans-serif;font-size:12.8px">As for price, depends on size. I think the LNP40s are not about $50K and LNP120 about $120K (I suggest getting a quote instead of taking my word on this). This doesn't account for install costs (plumbing for water-cooled, mounting of the filters, O2 alarm if you don't already have one). The cost to purchase LN2 for us is $8L in Fairbanks so it was a no-brainer for us to make our LN2. Been running LN2 generators since 2008.</div><div style="font-family:arial,sans-serif;font-size:12.8px"><br></div><div style="font-family:arial,sans-serif;font-size:12.8px"><span style="font-size:12.8px">You can view more information about our setup on </span><a href="https://www.uaf.edu/museum/collections/genomics/" target="_blank" style="font-size:12.8px">our webpage</a> and feel free to contact me if you have any further questions.<br></div><div style="font-family:arial,sans-serif;font-size:12.8px"><br></div><div style="font-family:arial,sans-serif;font-size:12.8px">Kyndall</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Aug 9, 2022 at 6:46 AM Bentley, Andrew Charles <<a href="mailto:abentley@ku.edu" target="_blank">abentley@ku.edu</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">
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<p class="MsoNormal">Hi all<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">The tissue collections at KU are rapidly expanding as are our liquid nitrogen dewars. We are potentially getting to the tipping point of purchasing a liquid nitrogen generator to supply our needs rather than purchasing from an outside
entity. Does anyone have such a unit at a museum? If so, how much does the unit cost, how much liquid nitrogen does it develop over a set period and what other infrastructure is required in order to operate such a unit and supply liquid nitrogen to dewars?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Thanks in advance for any information that can help us make this decision.<u></u><u></u></p>
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<p class="MsoNormal">Andy<u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-AU"> A : A : A :<br>
}<(((_°>.,.,.,.}<(((_°>.,.,.,.}<)))_°><br>
V V V<br>
Andy Bentley<br>
Ichthyology Collection Manager<br>
University of Kansas<br>
Biodiversity Institute<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU">Dyche Hall<br>
<a><span style="color:rgb(5,99,193)">1345 Jayhawk Boulevard</span></a><br>
<a><span style="color:rgb(5,99,193)">Lawrence, KS, 66045-7561</span></a><br>
<a><span style="color:rgb(5,99,193)">USA</span></a><br>
<br>
Tel: <a href="tel:%28785%29%20864-3863" target="_blank"><span style="color:rgb(5,99,193)">(785) 864-3863</span></a><br>
Fax: <a href="tel:%28785%29%20864-5335" target="_blank"><span style="color:rgb(5,99,193)">(785) 864-5335</span></a> <br>
Email: <a href="mailto:abentley@ku.edu" target="_blank"><span style="color:rgb(5,99,193)">abentley@ku.edu</span></a> <u></u><u></u></span></p>
<p class="MsoNormal">ORCID: <span style="color:rgb(73,74,76);background:white"><a href="https://orcid.org/0000-0002-3093-1258" target="_blank"><span style="color:rgb(5,99,193)">https://orcid.org/0000-0002-3093-1258</span></a><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU"><a href="http://ichthyology.biodiversity.ku.edu/" target="_blank"><span style="color:rgb(5,99,193)">http://ichthyology.biodiversity.ku.edu</span></a></span><u></u><u></u></p>
<p class="MsoNormal"> A : A : A :<br>
}<(((_°>.,.,.,.}<(((_°>.,.,.,.}<)))_°><br>
V V V<u></u><u></u></p>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr"><div dir="ltr"><div><br></div><div>*************************</div><div><a href="http://www.uaf.edu/museum/collections/genomics/staff/" target="_blank">Kyndall Hildebrandt</a> Powers</div><div><a href="http://www.uaf.edu/museum/collections/genomics/" target="_blank">Genomic Resources</a> Collection Manager</div><div><a href="http://www.uaf.edu/museum/" target="_blank">University of Alaska Museum</a></div><div>1962 Yukon Dr.</div><div>Fairbanks, Alaska 99775</div><div><br></div><div><a href="mailto:kbhildebrandt@alaska.edu" target="_blank">khpowers@alaska.edu</a></div><div>907-474-6914</div><div><br></div><div>UAM Collection database:<br><a href="http://arctos.database.museum/SpecimenSearch.cfm" target="_blank">http://arctos.database.museum/</a></div><div><a href="https://arctosdb.org/" target="_blank">https://arctosdb.org/</a><br></div><div>*************************</div></div></div></div>