M. Battistin – 28th May 2010 EN/CV/DC

M. Battistin (EN/CV/DC)

28th May 2010

Detector Cooling ProjectIII Thermosiphon Workshop

-Introduction to the workshop

M. Battistin – 28th May 2010 EN/CV/DC 2

Welcome to the third workshop on Thermosiphon

After more than one year of activity on this project achieved steps:

• TS WI: describe the main lines of the project

• TS WII: assess the feasibility and obtain resources for mini-thermosiphon and full scale thermosiphon bench test

• TS WIII: shows first results form mini-thermosiphon and launch the engineering phase of ATLAS ID cooling refurbishment project to comply with the 2012 installation planning

M. Battistin – 28th May 2010 EN/CV/DC 3

Index• Advancement of sonar fluorocarbon mixture analyzer for

C2F6/C3F8 evaporative cooling development• Results from the Mini-Thermosiphon tests• Status of the PX15 thermosiphon project• Seismic calculation for the PX15 piping• System integration in PX15 • Thermosiphon control system• Test plan for the PX15 thermosiphon• Issues related to the 60 kW installation scale up and blends

management• Low temperature chillers Market Survey MS-3684/EN/ATLAS• Thermosiphon solution for Alice SPD cooling system• Back-up solutions to the ATLAS ID Thermosiphon: centrifugal

compressors• Conclusions

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Status of the cooling systemATLAS ID Evaporative cooling station is running in this very moment. We cannot forget:• The important failure of 3 compressors on May the 1st 2008.• The fatigue problem observed on autumn 2008• The cylinder suction valve problem on 14th February 2010.• …this is not a reliable system!

M. Battistin - EN/CV/DC 15th April 2010

The alternative solution shall be: • Reliable• Clean: wear of components obliges to

an important filtering process • Leak-tight: developing with time due

(in part) to vibrations• Oil free• Able to manage mixtures (C3F8-C2F6)

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Main streams of investigationSince the compressor refurbishment executed during spring 2009 we decided

to not invest on Haug compressors any longer and study alternative solutions. Two main streams of study has been defined:

1) No compressors: thermosiphon project2) Alternative compressors (screw, labyrinth, membrane, centrifugal): finally

the centrifugal magnetic bearing oil free compressor has been identified as very good candidate (Turbocor – McQuay)

Oil free gas bearing centrifugal compressor is a very new investigation line we are opening now. It is premature to give details.

M. Battistin – 28th May 2010 EN/CV/DC

Blends studies on mini

thermosiphon

2009 2010 2011

Mini thermosiphonBdg 191 – 10 k€

ThermosiphonPX15 – 200 kCHF

Market Survey + Invitation to Tenderfor low temperature chiller – 2 MCHF

Validation

Design and procurement for the final solution installation in 2012

Procurement & installation

Perfluorocarbon Blends cooling test in SR1 and PX15

6

ValidationTURBOCOR tests

PX15 piping installation

Turbocor purchase and installation phase

M. Battistin – 28th May 2010 EN/CV/DC

Resources neededJan GodlewkiDanilo GiugniMichele Battistin

Are following the all process part time

Elena PerezJose Direito

Have this activity as first priority and dedicate to this at least 50% of their time. Elena Perez up to Jan 2011. Jose Direito fellowship starts Sep 2010.

Stephane BerryPierre BonneauPierre FeraudetOlivier CrespoFlorian CorbazDaniel Lefils

They all are contributing to the projects providing technical support for mechanical, electrical, control aspects in parallel to the daily operation and maintenance activity of the section.

New resources shall be dedicated to these projects(Oil free compressor + thermosiphon)

Alex BitadzeLukasz ZwalinskiDelio Ramon

Are following this project part time.