Intermediate Temperature Storage

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jordansparks
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Intermediate Temperature Storage

Postby jordansparks » Fri Aug 18, 2017 9:40 am

Our ITS dewar arrived last month, and we are trying to find time to test the LN2 consumption rate, etc.
http://www.oregoncryo.com/intermediateTempStorage.html
I'm really curious to see what the cost is to keep it running.

I was really excited about it last year. But as I've thought hard about the pros and cons, I've lost some of my enthusiasm. Yes, it might prevent some cracking. But maybe cracking isn't even currently a big problem. We need to do some experiments to answer that question. Maybe it would be cheaper. But it might just as easily be the same or more expensive than standard LN2 storage. So, we'll move forward with it, but I'm pretty ambivalent about it now. We will not be hyping it.

jordansparks
Site Admin
Posts: 44
Joined: Thu Aug 27, 2015 3:59 pm

Re: Intermediate Temperature Storage

Postby jordansparks » Fri Dec 15, 2017 6:08 pm

It's been cooled down to -135, now. The thermostat is set so that if it warms to -131, it will start a cooling cycle with liquid nitrogen. The cooling cycle is gentler than I thought it would be, and takes well over an hour. Even more surprising to me is that it only has to cycle about once every 15 hours. Preliminary results show that it is using 4 times less liquid nitrogen for the same volume of storage as the liquid dewar. I would have been happy with equal cost, but lower cost is very exciting.


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