Subject: Helium!
In-Reply-To: <SN4PR0901MB22242FF28300867002E40160B8B10@SN4PR0901MB2224.namprd09.prod.outlook.com>
References: <8BA62FF0-A248-43FB-8116-42540D6C70BF@info-igor.org>
<5e557145-9559-c7a7-943b-8943e20eae2e@colostate.edu>
<12F261E5-1209-4712-A25B-C479089B594B@info-igor.org>
<SN4PR0901MB22245B685B3B917F0FDE2F56B8B60@SN4PR0901MB2224.namprd09.prod.outlook.com>
<592F9A5E-E795-4C2B-8B1F-3C6279C4D876@info-igor.org>
<SN4PR0901MB22242FF28300867002E40160B8B10@SN4PR0901MB2224.namprd09.prod.outlook.com>
Message-ID: <5E32F02BACF3FD428199CED90C94A45D4E3CDB9C@ENT-PPMSG-MBX01.TDY.Teledyne.com>

Liquid calculations are a lot easier and more accurate, too. Even though helium behaves most closely like an ideal gas, money considerations require the horribly complicated equations with umpteen virial coefficients.

How does superfluidity factor in flow calculations?

As far as I am concerned, this is the only valid non-scientific use of helium:
https://www.youtube.com/watch?v=Fww0OPfyOfg

-- Payam
x4514


-----Original Message-----
From: Info-igor info-igor-bounces at lists.info-igor.org On Behalf Of Springston, Stephen via Info-igor
Sent: Wednesday, September 11, 2019 10:20 AM
To: Igor Discussion List <info-igor at lists.info-igor.org>
Cc: Springston, Stephen <srs at bnl.gov>
Subject: RE: Helium!

---External Email---

Wonderfully off topic for Igor, but extremely topical for science.

Wow, that's a lot of He. And units do matter. I was being flip. As a chemist, I still find people confused about STP. The real reason to conserve He transcends financial as I'm sure all will agree.

Stephen R. Springston
srs at bnl.gov
(631) 344-4477

Building 815E
Brookhaven National Laboratory
Upton, NY 11973-5000

-----Original Message-----
From: Info-igor info-igor-bounces at lists.info-igor.org On Behalf Of Scott Hannahs
Sent: 2019-09-11 13:02
To: Igor Discussion List <info-igor at lists.info-igor.org>
Subject: Re: Helium!

Absolutely. I think I said liquid liter equivalents early on but I may have dropped that in the replies. We have standardized on liquid liter equivalents since it is easier to visualize and is what we as experimenters/users of the facility think in. The gas is delivered in 100SCF and priced that way which is ugly. The storage tanks are in gaseous gallons.

So we talk about quantities stored and transferred in liquid liter equivalents. However all our flows (purifier, magnet cooling, liquefier) are in grams/sec. Go figure.

It is a lot. And trying to keep losses down to a minimum is becoming more and more financially important.

-Scott


> On Sep 10, 2019, at 3:21 PM, Springston, Stephen via Info-igor <info-igor at lists.info-igor.org> wrote:
>
> Liquid or gaseous L/y?? State matters. ~24L gas = ~32 cm^3 liquid.
> 800,000 is a lot in either state. (Misspent chemistry training)
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.info-2Digor.org_private.cgi_info-2Digor-2Dinfo-2Digor.org_attachments_20190911_be77f909_attachment.html&d=DwICAg&c=aTOVZmpUfPKZuaG9NO7J7Mh6imZbfhL47t9CpZ-pCOw&r=V_q-T2KMK1UviPImNGKvgg&m=qx2EfdJc0j31k9takORiEQ2AM4DGW2qhsrAxiW2vVe0&s=40Y0CrIUEXzt9MmSuVgFdoHniLMQ-uq8zCiEBSbSRGc&e= > _______________________________________________
Info-igor mailing list
Info-igor at lists.info-igor.org
https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.info-2Digor.org_listinfo.cgi_info-2Digor-2Dinfo-2Digor.org&d=DwICAg&c=aTOVZmpUfPKZuaG9NO7J7Mh6imZbfhL47t9CpZ-pCOw&r=V_q-T2KMK1UviPImNGKvgg&m=qx2EfdJc0j31k9takORiEQ2AM4DGW2qhsrAxiW2vVe0&s=OSsonS-Zfna-zU-gG2EZdxNbhq3mPX4qG_nKZBRg__I&e=
_______________________________________________
Info-igor mailing list
Info-igor at lists.info-igor.org
http://lists.info-igor.org/listinfo.cgi/info-igor-info-igor.org