[Dsg-rich] RICH air cooling pressure system update - Supply Lines and Internal Air Distribution Manifolds

[Tomassini Sandro]

Hi Amrit and George,
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.
In addition we have tested  the system for months here in Italy without any problem of pressure drop, flow rate and temperature field.
Anyway if you think that the other way is better than the one we have done, no problem, go on.
I think, to follow this second way we need to rethink the suspention system of the manyfold and produce the particular supports.
Dario is at jlab and he knows the nozzle distribution along the manyfold and the constraints in the e-panel.
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.

Sandro

⁣Inviato da Blue ​

Il giorno 21 set 2017 20:18, alle ore 20:18, Amrit Yegneswaran <yeg at jlab.org> ha scritto:
>hi sandro
>george's suggestion is good.
>also, i wanted to know how many orifices (and their diameters) are
>there along the air distribution manifold?
>amrit
>
>
>
>
>From: "George Jacobs" <jacobsg at jlab.org>
>To: "Sandro Tomassini" <sandro.tomassini at lnf.infn.it>,
>dsg-rich at jlab.org, "Bob Miller" <rmiller at jlab.org>, "Matt Marchlik"
><marchlik at jlab.org>
>Cc: "Amrit Yegneswaran" <yeg at jlab.org>, "Patrizia Rossi"
><rossi at jlab.org>
>Sent: Thursday, September 21, 2017 1:22:42 PM
>Subject: Re: [Dsg-rich] RICH air cooling pressure system update -
>Supply Lines and Internal Air Distribution Manifolds 
>
>Hi Sandro,
>
>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.
>
>George
>
>On 9/21/2017 11:02 AM, Sandro Tomassini wrote:
>
>
>
>
>Hi Jeorge,
>
>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.
>
>Best regards
>
>Sandro
>
>Il 21/09/2017 16:54, George Jacobs ha scritto:
>
>BQ_BEGIN
>Hi Bob,
>
>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.
>
>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.
>
>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.
>
>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.
>
>Due to the accelerated schedule, we should quickly determine a way
>forward to complete any remaining pressure system requirements.
>
>Thanks,
>George
>--
>George Jacobs
>Jefferson Lab (TJNAF)
>STE 12
>12000 Jefferson Ave.
>Newport News, VA 23606
>
>(office) 757-269-7115
>
>(cell)   757-876-0480
>
>(email) jacobsg at jlab.org (website) https://userweb.jlab.org/~jacobsg
>
>
>_______________________________________________
>Dsg-rich mailing list Dsg-rich at jlab.org
>https://mailman.jlab.org/mailman/listinfo/dsg-rich
>
>
>
>--
>-----------------------------------------
>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: sandro.tomassini at lnf.infn.it https://urldefense.proofpoint.com/v2/url?u=http-3A__www.lnf.infn.it_&d=DwIFaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=9YtCiIg5kE6YCo5iFAyFiMgzNCONVcBowotEOgGZ4Co&m=KRWbEkz6_zhL7oxS6wPTs5Jqh1NprYIK5phDzyAbFkI&s=lveex4kA9QuaaX83UjhfEu38f7DYa_RzlVpujmd1CDc&e= 
>-----------------------------------------
>--
>
>
>_______________________________________________
>Dsg-rich mailing list Dsg-rich at jlab.org
>https://mailman.jlab.org/mailman/listinfo/dsg-rich
>
>BQ_END
>
>--
>George Jacobs
>Jefferson Lab (TJNAF)
>STE 12
>12000 Jefferson Ave.
>Newport News, VA 23606
>
>(office) 757-269-7115
>
>(cell)   757-876-0480
>
>(email) jacobsg at jlab.org (website) https://userweb.jlab.org/~jacobsg
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/dsg-hallb_rich/attachments/20170921/84a8abd1/attachment-0002.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IMG-20170921-WA0007.jpeg
Type: image/jpeg
Size: 1534537 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/dsg-hallb_rich/attachments/20170921/84a8abd1/attachment-0002.jpeg>