Hello Torsten
Looking at P&D
- Line B int: 1.1 barg in the He guard, protected at 1 barg (MEYLSQLH0004)
- Line C int: 2.9 barg (MEYLSQLH0004)
- Line D int: 2.9 barg (MEYLSQLH0006) If I am not wrong… please check it
So, we should design our vessel under the scope of the PED, for PS=2.9 barg.
Do you agree?
Kind regards,
Luca
Luca Dassa, PhD
CERN - European Organization for Nuclear Research
EN Department - MME-EDM Group
CH-1211 Geneva 23
SWITZERLAND
office: 112-3/023 (postbox: M16210)
mobile: +41 75 411 1513 (int. 161513)
phone: +41 22 76 62356 (int. 62356)
e-mail: luca.dassa@cern.ch
From: Torsten Koettig <torsten.koettig@cern.ch>
Sent: 20 July 2020 13:23
To: Luca Dassa <Luca.Dassa@cern.ch>
Subject: RE: Fresca 1 SV pipe
Hi Luca,
Now thinking about it, we need to make it at least the same pressure as the max. supply line pressure.
Yours Torsten
From: Luca Dassa <Luca.Dassa@cern.ch>
Sent: 20 July, 2020 12:02
To: Torsten Koettig <torsten.koettig@cern.ch>
Subject: RE: Fresca 1 SV pipe
Thank you, Torsten!
Concerning the pressure rating for the PED classification, I will think about it.
If it is not a problem for the operation, 0.5 barg should be the best option.
Kind regards,
Luca
Luca Dassa, PhD
CERN - European Organization for Nuclear Research
EN Department - MME-EDM Group
CH-1211 Geneva 23
SWITZERLAND
office: 112-3/023 (postbox: M16210)
mobile: +41 75 411 1513 (int. 161513)
phone: +41 22 76 62356 (int. 62356)
e-mail: luca.dassa@cern.ch
From: Torsten Koettig <torsten.koettig@cern.ch>
Sent: 20 July 2020 07:48
To: Luca Dassa <Luca.Dassa@cern.ch>
Subject: RE: Fresca 1 SV pipe
Hi Luca,
I am back from my short vacation.
I used the assumptions:
set pressure 0.5 barg (if we can and make it a pressure vessel we can go higher in pressure…)
Loss of insulation vacuum with 20 MLI
0.5 m2 cold surface (estimation, since I do not have the correct numbers)
0.45 m distance to SV and no distance at SV outlet.
Yours Torsten
From: Luca Dassa <Luca.Dassa@cern.ch>
Sent: 10 July, 2020 18:26
To: Torsten Koettig <torsten.koettig@cern.ch>
Cc: Laetitia Dufay-Chanat <laetitia.dufay-chanat@cern.ch>
Subject: RE: Fresca 1 SV pipe
Hello Torsten,
Thank you for this information.
Which are the input you used for the evaluation?
- set pressure of the relief device?
- Loss of insulation vacuum? Or heat loads per surface unit?
Kind regards,
Luca
Luca Dassa, PhD
CERN - European Organization for Nuclear Research
EN Department - MME-EDM Group
CH-1211 Geneva 23
SWITZERLAND
office: 112-3/023 (postbox: M16210)
mobile: +41 75 411 1513 (int. 161513)
phone: +41 22 76 62356 (int. 62356)
e-mail: luca.dassa@cern.ch
From: Torsten Koettig <torsten.koettig@cern.ch>
Sent: 10 July 2020 16:07
To: Luca Dassa <Luca.Dassa@cern.ch>; Laetitia Dufay-Chanat <laetitia.dufay-chanat@cern.ch>
Subject: Fresca 1 SV pipe
Hi Luca,
I have checked the vacuum break condition for the phase separator and if the pipe is 0.45 m long we can handle it with DN15 which is inside a big bigger 16-17 mm.
The flow rate can be handled if we place 20 layers MLI.
Yours Torsten
________________________________________
Dr. Torsten Koettig
Central Cryogenic Laboratory
CERN TE-CRG-CI ,
CH-1211 Geneva 23
Email: torsten.koettig@cern.ch
Office 165/1-002, Mailbox F07500
Mobile: +41 75 411 8530