Re: [AMMRL] CryoMech Compact Helium Recovery System

From: <gregory.wylie_at_chem.tamu.edu>
Date: Wed, 06 Sep 2023 13:37:58 -0700

HI Yuan

As Ken says the companies offer little help with this. Each site is very
different so without really knowing your setup this is hard to answer.

I have talked to a couple of sites that have these all metal systems (no bag).
One issue is that they connected everything up and then put the 2in line into
a 1/4in hole on the tank. So when attempting to fill the system they had lots
of back pressure. So assuming your systems are plumbed correctly I think the
PSI value that your compressor turns on at 2.5 needs to be lowered. Magnets
will not vent normally at that PSI. My understanding is that when there is a
small pressure in the lines and tank the compressor should cycle on and off
(can potentially pull on your magnets this is why back pressure controllers
and such are used). During a fill the lines can not become too pressurized
or else normal boil-off will not happen, this would be an issue for the
second magnet not being filled.

Hopefully you will get more info from those who have this type of system. We
have high pressure here with a gas bag.

Greg
Gregory P. Wylie, Ph.D
NMR Facility Manager
Texas A&M University
Department of Chemistry
P.O. Box 30012
College Station, TX  77843-3255
gpwylie_at_tamu.edu
979.458.0705 (voice)
979.845.4719 (fax)
706.206.0007 (cell)
http://nmr.tamu.edu


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Subject: Re: [AMMRL] CryoMech Compact Helium Recovery System
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Any recommendation on the brand and type of back pressure regulator?

On Wed, Sep 6, 2023 at 4:38=E2=80=AFPM <gregory.wylie_at_chem.tamu.edu> wrote:

> HI Yuan
>
> As Ken says the companies offer little help with this. Each site is very
> different so without really knowing your setup this is hard to answer.
>
> I have talked to a couple of sites that have these all metal systems (no
> bag). One issue is that they connected everything up and then put the 2in
> line into a 1/4in hole on the tank. So when attempting to fill the system
> they had lots of back pressure. So assuming your systems are plumbed
> correctly I think the PSI value that your compressor turns on at 2.5 needs
> to be lowered. Magnets will not vent normally at that PSI. My understanding
> is that when there is a small pressure in the lines and tank the compressor
> should cycle on and off (can potentially pull on your magnets this is why
> back pressure controllers and such are used). During a fill the lines can
> not become too pressurized or else normal boil-off will not happen, this
> would be an issue for the second magnet not being filled.
>
> Hopefully you will get more info from those who have this type of system.
> We have high pressure here with a gas bag.
>
> Greg
> Gregory P. Wylie, Ph.D
> NMR Facility Manager
> Texas A&M University
> Department of Chemistry
> P.O. Box 30012
> College Station, TX 77843-3255
> gpwylie_at_tamu.edu
> 979.458.0705 (voice)
> 979.845.4719 (fax)
> 706.206.0007 (cell)
> http://nmr.tamu.edu
>
>
>

--=20

*Jennifer Sun*

Senior Research Scholar , Molecular Education, Technology and Research Innovation Center
Joint Research Assistant Professor, Department of Chemistry
North Carolina State University
2620 Yarbrough Drive
Raleigh, NC 27607
(919) 515-1160

*xsun9_at_ncsu.edu <xsun9_at_ncsu.edu>*

https://research.ncsu.edu/metric/
https://labs.ncsu.edu/

Please citing METRIC to support us:
All NMR measurements were made in the Molecular Education, Technology and
Research Innovation Center (METRIC) at NC State University.


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<div dir=3D"ltr">Any recommendation=C2=A0on the brand and type of back pres=
sure regulator?</div><br/><div class=3D"gmail_quote"><div dir=3D"ltr" class=
=3D"gmail_attr">On Wed, Sep 6, 2023 at 4:38=E2=80=AFPM &lt;<a href=3D"mailt=
o:gregory.wylie_at_chem.tamu.edu">gregory.wylie_at_chem.tamu.edu</a>&gt; wrote:<b=
r/></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8e=
x; border-left:1px solid rgb(204,204,204); padding-left:1ex;">HI Yuan<br/><=
br/>As Ken says the companies offer little help with this. Each site is ver=
y different so without really knowing your setup this is hard to answer.<br=
/><br/>I have talked to a couple of sites that have these all metal systems=
 (no bag). One issue is that they connected everything up and then put the =
2in line into a 1/4in hole on the tank. So when attempting to fill the syst=
em they had lots of back pressure. So assuming your systems are plumbed cor=
rectly I think the PSI value that your compressor turns on at 2.5 needs to =
be lowered. Magnets will not vent normally at that PSI. My understanding is=
 that when there is a small pressure in the lines and tank the compressor s=
hould cycle on and off (can potentially pull on your magnets this is why ba=
ck pressure controllers and such are used). During a fill the lines can not=
 become too pressurized or else normal boil-off will not happen, this would=
 be an issue for the second magnet not being filled.<br/><br/>Hopefully you=
 will get more info from those who have this type of system. We have high p=
ressure here with a gas bag.<br/><br/>Greg<br/>
<div>Gregory P. Wylie, Ph.D</div>
<div>NMR Facility Manager<br/>Texas A&amp;M University<br/>Department of Ch=
emistry<br/>P.O. Box 30012<br/>College Station, TX =C2=A077843-3255<br/><a =
href=3D"mailto:gpwylie_at_tamu.edu" rel=3D"noopener" target=3D"_blank">gpwylie=
_at_tamu.edu</a><br/>979.458.0705 (voice)<br/>979.845.4719 (fax)<br/>706.206.0=
007 (cell)<br/><a href=3D"https://urldefense.com/v3/__http://nmr.tamu.edu/_=
_;!!PvDODwlR4mBZyAb0!QdQdGZAFSbPPNU-qBKUqO9eRyzuUMxLMFcKqItUCrnv_rvZY4sIHAN=
FJJoyVm8a5aDX7idblscoHwBR93MvoWg497w$" rel=3D"noopener" target=3D"_blank">h=
ttp://nmr.tamu.edu</a></div>




<p></p><p></p></blockquote></div><br clear=3D"all"/><div><br/></div><span c=
lass=3D"gmail_signature_prefix">-- </span><br/><div dir=3D"ltr" class=3D"gm=
ail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><div dir=3D"ltr"><p c=
lass=3D"MsoNormal" style=3D"margin:0in 0in 8pt; line-height:11.75pt; border=
:none; padding:0in;"><defangedfont face=3D"georgia, serif"><span style=3D"b=
ackground:rgb(255,255,255);"><b>Jennifer Sun</b></span><i><u></u></i></defa=
ngedfont></p><p class=3D"MsoNormal" style=3D"margin:0in 0in 8pt; line-heigh=
t:11.75pt; border:none; padding:0in;"><defangedfont face=3D"georgia, serif"=
><span style=3D""><defangedfont size=3D"2">Senior Research Scholar=C2=A0</d=
efangedfont></span><span style=3D"">, Molecular Education, Technology and R=
esearch Innovation Center</span></defangedfont></p><p class=3D"MsoNormal" s=
tyle=3D"margin:0in 0in 8pt; line-height:11.75pt; border:none; padding:0in;"=
><defangedfont face=3D"georgia, serif"><span style=3D"">Joint Research Assi=
stant Professor</span><span style=3D"">, Department of Chemistry</span><u><=
/u></defangedfont></p><p class=3D"MsoNormal" style=3D"margin:0in 0in 8pt; l=
ine-height:11.75pt; border:none; padding:0in;"><span style=3D""><defangedfo=
nt face=3D"georgia, serif">North Carolina State University</defangedfont></=
span></p><p class=3D"MsoNormal" style=3D"margin:0in 0in 8pt; line-height:11=
.75pt; border:none; padding:0in;"><span style=3D""><defangedfont face=3D"ge=
orgia, serif">2620 Yarbrough Drive</defangedfont></span></p><p class=3D"Mso=
Normal" style=3D"margin:0in 0in 8pt; line-height:11.75pt; border:none; padd=
ing:0in;"><span style=3D""><defangedfont face=3D"georgia, serif">Raleigh, N=
C 27607</defangedfont></span></p><p class=3D"MsoNormal" style=3D"margin:0in=
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<defangedfont face=3D"georgia, serif">(919) 515-1160</defangedfont></span><=
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/u></i></defangedfont></p><p class=3D"MsoNormal" style=3D"margin:0in 0in 8p=
t; line-height:11.75pt; border:none; padding:0in;"><a href=3D"https://urlde=
fense.com/v3/__https://research.ncsu.edu/metric/__;!!PvDODwlR4mBZyAb0!QdQdG=
ZAFSbPPNU-qBKUqO9eRyzuUMxLMFcKqItUCrnv_rvZY4sIHANFJJoyVm8a5aDX7idblscoHwBR9=
3MtZxtqoUQ$" style=3D"" target=3D"_blank"><span style=3D"">https://research=
.ncsu.edu/metric/</span></a></p><div dir=3D"ltr"><span style=3D""><a href=
=3D"https://urldefense.com/v3/__https://labs.ncsu.edu/__;!!PvDODwlR4mBZyAb0=
!QdQdGZAFSbPPNU-qBKUqO9eRyzuUMxLMFcKqItUCrnv_rvZY4sIHANFJJoyVm8a5aDX7idblsc=
oHwBR93MvzbfhUzg$" style=3D"" target=3D"_blank">https://labs.ncsu.edu/</a><=
/span></div><div dir=3D"ltr"><br/></div><div dir=3D"ltr"><span style=3D"">P=
lease citing METRIC to support us:</span><div><span style=3D"">All=C2=A0</s=
pan><span style=3D"">NMR</span><span style=3D"">=C2=A0measurements were mad=
e in the Molecular Education, Technology and Research Innovation Center (ME=
TRIC) at NC State University.<br/></span><br/><br/></div></div></div></div>=
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Received on Wed Sep 06 2023 - 13:38:01 MST

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