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Hi Sandro,<br>
<br>
The DA, Dave Meekins, and myself both agree that the 3D printed
parts cannot be used for the air cooling supply manifolds. They do
not meet pressure system requirements. <br>
<br>
In order to move forward in a timely manner, I will supply the 1/2"
OD SS tube and 1/2" OD nylon tubing along with the required
Swagelock fittings. The tubing will need holes drilled, cut to
length, etc.<br>
<br>
George<br>
<br>
<div class="moz-cite-prefix">On 9/21/2017 3:35 PM, Tomassini Sandro
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1cbc76d7-65d2-42e8-931d-75dd6870ff7f@lnf.infn.it">
<div dir="auto">Hi Amrit and George,<br>
</div>
<div dir="auto">I am not against the solution suggested by George
even though i think it is not as easy as it appears... This is
because the manifold was designed to cope not only with the air
distribution but also with the cable support, the specific
position in the volume to improve the heat exchange, the special
design to clamp the existing boards etc, etc.<br>
</div>
<div dir="auto">In addition we have tested the system for months
here in Italy without any problem of pressure drop, flow rate
and temperature field.<br>
</div>
<div dir="auto">Anyway if you think that the other way is better
than the one we have done, no problem, go on.<br>
</div>
<div dir="auto">I think, to follow this second way we need to
rethink the suspention system of the manyfold and produce the
particular supports.<br>
</div>
<div dir="auto">Dario is at jlab and he knows the nozzle
distribution along the manyfold and the constraints in the
e-panel.<br>
</div>
<div dir="auto">Just to conclude, the plastic manifold will be
ready by mid of next week. Attached there is a picture of the
prototype printed out in these days to check the result.<br>
<br>
</div>
<div dir="auto">Sandro<br>
<br>
</div>
<div dir="auto"><!-- tmjah_g_1299s -->Inviato da
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<div class="gmail_quote">Il giorno 21 set 2017, alle ore 20:18,
Amrit Yegneswaran <<a href="mailto:yeg@jlab.org"
target="_blank" moz-do-not-send="true">yeg@jlab.org</a>> ha
scritto:
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
<div style="font-family: tahoma,new york,times,serif;
font-size: 14pt; color: #009900">
<div>hi sandro </div>
<div>george's suggestion is good.<br>
</div>
<div>also, i wanted to know how many orifices (and their
diameters) are there along the air distribution manifold?<br
data-mce-bogus="1">
</div>
<div>amrit<br data-mce-bogus="1">
</div>
<div><br data-mce-bogus="1">
</div>
<div><br data-mce-bogus="1">
</div>
<div><br>
</div>
<hr id="zwchr" data-marker="__DIVIDER__">
<div data-marker="__HEADERS__"><b>From: </b>"George Jacobs"
<a class="moz-txt-link-rfc2396E" href="mailto:jacobsg@jlab.org"><jacobsg@jlab.org></a><br>
<b>To: </b>"Sandro Tomassini"
<a class="moz-txt-link-rfc2396E" href="mailto:sandro.tomassini@lnf.infn.it"><sandro.tomassini@lnf.infn.it></a>, <a class="moz-txt-link-abbreviated" href="mailto:dsg-rich@jlab.org">dsg-rich@jlab.org</a>,
"Bob Miller" <a class="moz-txt-link-rfc2396E" href="mailto:rmiller@jlab.org"><rmiller@jlab.org></a>, "Matt Marchlik"
<a class="moz-txt-link-rfc2396E" href="mailto:marchlik@jlab.org"><marchlik@jlab.org></a><br>
<b>Cc: </b>"Amrit Yegneswaran" <a class="moz-txt-link-rfc2396E" href="mailto:yeg@jlab.org"><yeg@jlab.org></a>,
"Patrizia Rossi" <a class="moz-txt-link-rfc2396E" href="mailto:rossi@jlab.org"><rossi@jlab.org></a><br>
<b>Sent: </b>Thursday, September 21, 2017 1:22:42 PM<br>
<b>Subject: </b>Re: [Dsg-rich] RICH air cooling pressure
system update - Supply Lines and Internal Air Distribution
Manifolds<br>
</div>
<div><br>
</div>
<div data-marker="__QUOTED_TEXT__">Hi Sandro,<br>
<br>
I think the simplest solution is to replace the metric
tubing with 1/2" OD nylon tubing to route the air from the
patch panel to the air distribution manifold. Then use
1/2" SS tube for the manifolds. These materials are in
house.<br>
<br>
George<br>
<br>
<div class="moz-cite-prefix">On 9/21/2017 11:02 AM, Sandro
Tomassini wrote:<br>
</div>
<blockquote
cite="mid:b2d20f09-4ac5-2b2a-ea7b-bfe2c6f0da7d@lnf.infn.it">
<p>Hi Jeorge,</p>
<p>you mentioned the two 10 mm ID internal supply lines
and distribution manifolds internal to the detector,
unfortunately the OD for these lines is 10 mm and not
the ID.</p>
<p>Best regards</p>
<p>Sandro<br>
</p>
<br>
<div class="moz-cite-prefix">Il 21/09/2017 16:54, George
Jacobs ha scritto:<br>
</div>
<blockquote
cite="mid:933c2230-14c6-769c-8168-02085e306858@jlab.org">Hi
Bob,<br>
<br>
The RICH air cooling pressure system does not include
the air supply line from the valve panel to the RICH
or the distribution manifolds inside the electronics
module installed inside the RICH. Pressure in the
internal distribution manifold could be as high as 60
psi at full design air flow. Assuming a worse case
scenario of the supply pressure regulator failure, it
could be as high as 90 psi.<br>
<br>
Plan is to run two 1" OD, 0.813" ID nylon tubes from
the panel to the detector, L=60 ft each, to supply the
two 10 mm ID internal supply lines and distribution
manifolds internal to the detector, L=16 ft each. see
attached diagram.<br>
<br>
The distribution manifold was designed by INFN and
produced by a 3D printer. These manifolds are
questionable at best. I have suggested that these be
replaced with a section of SS tubing that has the 2mm
holes, orifices, drilled in it.<br>
<br>
The 1" OD Nylotube is rated at 230 psi. The 10mm ID
tubing and 10mm SS tubing are rated > 120 psi. All
components have pressure rating greater than the worse
case failure scenario.<br>
<br>
Due to the accelerated schedule, we should quickly
determine a way forward to complete any remaining
pressure system requirements.<br>
<br>
Thanks,<br>
George<br>
<pre class="moz-signature">--
George Jacobs
Jefferson Lab (TJNAF)
STE 12
12000 Jefferson Ave.
Newport News, VA 23606
(office) 757-269-7115
(cell) 757-876-0480
(email) <a class="moz-txt-link-abbreviated" href="mailto:jacobsg@jlab.org" target="_blank" data-mce-href="mailto:jacobsg@jlab.org" moz-do-not-send="true">jacobsg@jlab.org</a>
(website) <a class="moz-txt-link-freetext" href="https://userweb.jlab.org/%7Ejacobsg" target="_blank" data-mce-href="https://userweb.jlab.org/%7Ejacobsg" moz-do-not-send="true">https://userweb.jlab.org/~jacobsg</a>
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<pre class="moz-signature">--
-----------------------------------------
Dr. Eng. Sandro Tomassini
Istituto Nazionale di Fisica Nucleare
Laboratori Nazionali di Frascati
---Research Division---
P.O.Box 13 00044 Frascati (RM) Italy
Tel. office: +39 06 9403 2919/8089
Fax: +39 06 94032256
e-mail: <a class="moz-txt-link-abbreviated" href="mailto:sandro.tomassini@lnf.infn.it" target="_blank" data-mce-href="mailto:sandro.tomassini@lnf.infn.it" moz-do-not-send="true">sandro.tomassini@lnf.infn.it</a>
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<br>
<pre class="moz-signature">--
George Jacobs
Jefferson Lab (TJNAF)
STE 12
12000 Jefferson Ave.
Newport News, VA 23606
(office) 757-269-7115
(cell) 757-876-0480
(email) <a class="moz-txt-link-abbreviated" href="mailto:jacobsg@jlab.org" target="_blank" data-mce-href="mailto:jacobsg@jlab.org" moz-do-not-send="true">jacobsg@jlab.org</a>
(website) <a class="moz-txt-link-freetext" href="https://userweb.jlab.org/%7Ejacobsg" target="_blank" data-mce-href="https://userweb.jlab.org/~jacobsg" moz-do-not-send="true">https://userweb.jlab.org/~jacobsg</a>
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</div>
</blockquote>
</div>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
George Jacobs
Jefferson Lab (TJNAF)
STE 12
12000 Jefferson Ave.
Newport News, VA 23606
(office) 757-269-7115
(cell) 757-876-0480
(email) <a class="moz-txt-link-abbreviated" href="mailto:jacobsg@jlab.org">jacobsg@jlab.org</a>
(website) <a class="moz-txt-link-freetext" href="https://userweb.jlab.org/~jacobsg">https://userweb.jlab.org/~jacobsg</a></pre>
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