Dear AMMRL Community,
Regarding our AstraZeneca helium recovery setup in Gothenburg, we have a bagless
helium recycling system (QT) that has been operational and working well for
about 18 months.
We're reaching out to community members regarding experience, tips&tricks,
and advice about how much helium you believe we can realistically expect to
recover with the following upcoming scenario:
During this year we will decommission an old Oxford 500 MHz magnet. We will
replace it with a new magnet.
Naturally, we would like to recover as much helium as possible during the
decommissioning and commissioning process, but without risking our existing
systems, nor making the process too arduous for the visiting magnet engineer.
Thank you in advance for your thoughts and any follow-up questions,
Richard Lewis
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> Sent: Wednesday, January 31, 2024 4:51 AM
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> Subject: Re: [AMMRL] "bag-less" helium-recovery
Dear Chris,
I may of course be missing something - unfortunately the quantum-technology
webpage doesn't appear to contain any detailed information about their "Picasso"
NMR setup - it's not really clear to me how they handle the vastly different
scenarios of very small boiloff over weeks and months where you cannot have a
large compressor running continuously without risk of boiling off all helium,
and then needing to pump much larger quantities during a helium refill. Possibly
by having two compressors, one very small, running continuously to capture normal
boiloff and a larger one during refills? At any rate, without "zero-pressure"
storage a pump must operate continuously and in a delicately controlled manner
to avoid any over- or underpressure, both being potentially dangerous for the magnet.
The company provides, however, a link to their customer Astra Zeneca in Mölndal,
Sweden as well as mentioning the Swedish NMR centre in Göteborg - maybe not a bad
idea to contact them about it? Probably the Astra Zeneca setup will be the more
"interesting" one as the Göteborg NMR centre operates four pumped magnets which
are constantly boiling off a large amount of helium - so not really close to a
"typical" NMR lab (but an excellent setup for a helium recycling plant).
Just my 0.02 EUR,
Bert
Am 28.01.2024 um 21:09 schrieb Fares, Christophe <fares_at_mpi-muelheim.mpg.de>:
Dear Community,
I was wondering if there is anyone out there willing to share their experience
with the He-recovery systems like the one from Quantum Technologies(Picasso/ "All-metal")
---- or similar? --- which have the characteristic feature that they works without a
"balloon" to collect He. Instead, the He boil-off is directly purified and re-liquefied.
In case of high flow (eg. during fills), a compressor switches on and stores excess
flow to a medium pressure container for later recovery. The advantages are the smaller
space requirements and the helium reaching the purifier less contaminated.
But perhaps there are obvious downsides which I am not seeing, especially since this
solution does not seem to be widespread.
Best regards
Chris
---------------------------------------------------
Christophe Farès, Ph.D.
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NMR Department/NMR Abteilung
Max-Planck Institut für Kohlenforschung
Kaiser-Wilhelm Platz 1
45470 Mülheim an der Ruhr
Tel: +49 208 306 2130
E-mail: fares [a] mpi-muelheim [.] mpg [.] de
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Dr. rer. nat. Bert Heise
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Received on Mon Feb 05 2024 - 09:11:06 MST