[Dsg-rich] corrected - Re: Upgrade to the RICH Valve panel

[Marc McMullen]

Hi Matt,

The panel is going to be installed in hall b, it was assembled and 
tested here in the EEL. Once tested it was tested, we needed it to 
provide cooling and N2 (being done currently) in the EEL.

*N2 System*,

We are supplying N2 via (2x) 240L dewars in parallel, because we don't 
have N2 in the EEL. The detector uses quite a bit of N2, and we would 
frequently run out, so, the dewars make it possible to run for 3-4 days 
at a stretch. This largely depends on how full the dewars are when they 
get into the building.

The 4 dewar set up is to supply uninterrupted N2 during the holiday 
shutdown. It will ensure that the Aerogel (which absorbs moisture) will 
be ok, once they install it. The Aerogel install is scheduled for next 
week. Once the packages are open, they must stay under nitrogen 
purge...continuously. Even during transport to hall b (January).

The changes are an oil coalescing filter after the supply, bubblers on 
the exhaust and the supply itself will be up to 4 dewars on a manifold.

*Cooling*

The cooling in the EEL is supplied by one of the compressors which will 
be used in the hall (both will be used eventually in the hall). The 
changes are an oil coalescing filter after the supply, a moisture 
transducer added to the tank, and the 1/2" SS tube (59" long, 0.065"wall 
thickness) manifolds connected with ~40' of poly tube per channel.
**


I have color coded all changes in red.

Thanks,

-- 
Marc McMullen
Detector Support Group
757-269-7738

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/dsg-hallb_rich/attachments/20171205/92adbaa2/attachment-0002.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: RICH-AirCool-ValvePanel_120517.pdf
Type: application/pdf
Size: 25827 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/dsg-hallb_rich/attachments/20171205/92adbaa2/attachment-0004.pdf>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: RICH-N2-valve panel_120517.pdf
Type: application/pdf
Size: 27121 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/dsg-hallb_rich/attachments/20171205/92adbaa2/attachment-0005.pdf>