1. Thermosiphon Project for ATLAS ID C 3 F 8 Evaporative Cooling - Status Report ATLAS ID Week CERN – Geneva October 28 th, 2013 M. Battistin & all TS team ATLAS + EN/CV

2. Water circuit Low T chiller Brine circuit Condenser C 3 F 8 piping USA15 by-pass unit EL power supply Sonar systems Control system Documentation Planning TS achievements ATLAS Surface USA15 PX15 UX15 28/10/2013M. Battistin - Thermosiphon Project2

3. Why a thermosiphon solution 28/10/2013M. Battistin - Thermosiphon Project3 PR thermal screen others 4 liquid lines 4 gas lines pneumatic valve manual valve manual valve dummy load BPR pixel 6 X SCT manual valve 7 Haug compressors condenser liquid tank mixed water Sub-cooler pneumatic valve UX15 USA15 Today Compressor reliability Vibrations – Leaks (slightly activated fluid) Recent increase of dust (compressor wear)

4. 28/10/2013M. Battistin - Thermosiphon Project4 PR thermal screen others 4 liquid lines 4 gas lines pneumatic valve manual valve manual valve dummy load BPR pixel 6 X SCT manual valve UX15 USA15 Tomorrow No active components Reduction of leaks No reason to “open” the circuit Possibility to decrease evaporation temperature from - 20 °C to -25°C and to -30°C using blends C 3 F 8 -C 2 F 6 Why a thermosiphon solution condenser liquid tank Heater pneumatic valve Low temperature Chiller USA15 Surface From compressors To compressors Full power dummy load

5. Chiller Circuit Water Circuit Brine Circuit Low Temperature StageHigh Temperature Stage Thermosyphon Circuit Primary Water TS Condenser Components of the TS Circuit 28/10/2013M. Battistin - Thermosiphon Project5 By-pass Let’s see photos showing the advancement for all components +25°C+27°C-30°C-70°C-65°C -68°C liquid +20°C liquid +20°C gas -25°C gas

6. Water Circuit 28/10/2013M. Battistin - Thermosiphon Project6 Water skid location in SH1 (Cryo building) in 2012

7. Water Circuit 28/10/2013M. Battistin - Thermosiphon Project7 Water skid location in SH1 (Cryo building) today Primary water heat exchanger Water circuit skid

8. 28/10/2013M. Battistin - Thermosiphon Project8 SX1-SH1 corner in 2011

9. 28/10/2013M. Battistin - Thermosiphon Project9 SX1-SH1 corner in 2011

10. 28/10/2013M. Battistin - Thermosiphon Project10 3D model of the low temperature chiller Low temperature circuit (-30°C / -70°C) Low temperature circuit (-30°C / -70°C) Warm temperature circuit (20°C / -30°C) Warm temperature circuit (20°C / -30°C)

11. 28/10/2013M. Battistin - Thermosiphon Project11 Chiller handling on March 2012

12. 28/10/2013M. Battistin - Thermosiphon Project12 Beginning of chiller connection on April 2012 Power connection to the EL cupboards in SX1

13. C 6 F 14 brine pumping station 28/10/2013M. Battistin - Thermosiphon Project13

14. 28/10/2013M. Battistin - Thermosiphon Project14 3D model of the pumping station – Cyril Degeorge

15. 28/10/2013M. Battistin - Thermosiphon Project15 Construction of the brain skid in SXL1 – May 2012 28 th November 2012

16. 28/10/2013M. Battistin - Thermosiphon Project16 Completion of installation and lagging – summer 2013 28 th November 2012

17. 28/10/2013M. Battistin - Thermosiphon Project17 Water and brine piping connections – summer 2013

18. 28/10/2013M. Battistin - Thermosiphon Project18 C3F8 condenser on the roof of SH1 building – C. Degeorge C 6 F 14 expansion tank C 3 F 8 condenser Degassing Sonar System

19. 28/10/2013M. Battistin - Thermosiphon Project19 15 th March 2013 1 st November 2012

20. Condenser installation SH1 roof 28/10/2013M. Battistin - Thermosiphon Project20 C 3 F 8 Condenser C 6 F 14 expansion tank SH1 roof today

21. 28/10/2013M. Battistin - Thermosiphon Project21 Sonar system – G. Hallewell, S. Katunin, C. Degeorge Sonar pipe Incondensable gases tank

22. 28/10/2013M. Battistin - Thermosiphon Project22 Degassing sonar system has been: -pressure tested -leak tested -Sonar sensors feed-back OK Ready to be installed -on top of the condenser -at the next available crane transport.

23. C3F8 piping to USA15 cavern 28/10/2013M. Battistin - Thermosiphon Project23 SDX1 building Liquid DN50 line Gas DN200 line

24. 28/10/2013M. Battistin - Thermosiphon Project24 By-pass installation in USA15 - C. Degeorge Liquid pre-heater Liquid-gas heat-exchanger Liquid-gas heat-exchanger Liquid post-heater Full power dummy-load Filters and measure sector

25. 28/10/2013M. Battistin - Thermosiphon Project25 Construction in bdg 298 by EN-CV-DC section. S. Nichilo, O. Crespo, D. Lefils, P. Bonneau, F. Corbaz By-pass construction in bdg 298 – S. Nichilo EN/CV/DC

26. 28/10/2013M. Battistin - Thermosiphon Project26 “Balcony” by-pass unit – 3 rd floor of USA15

27. 28/10/2013M. Battistin - Thermosiphon Project27 Completion of cabling and lagging on the “balcony” unit

28. 28/10/2013M. Battistin - Thermosiphon Project28 Connection to the “evaporative” in USA15 Liquid connection Liquid connection Gas connection Gas connection 4 gas return lines from the UX15 distribution racks 4 liquid supply lines to the UX15 distribution racks

29. TS – Compressors connections 28/10/2013M. Battistin - Thermosiphon Project29 Gas connection Gas connection Liquid connection Liquid connection Compressor room in USA15

30. Expansion gas tank connection + Sonar 28/10/2013M. Battistin - Thermosiphon Project30 Sonar Flow-rate + C 2 F 6 -C 3 F 8 concentration Sonar Flow-rate + C 2 F 6 -C 3 F 8 concentration Gas return to “big tank” connection. Compressor room in USA15 Gas return to the condenser Liquid supply from the condenser Gas “big tank” to guarantee 4 bar on pixel. Gas “big tank” to guarantee 4 bar on pixel.

31. Power and control cubicles in SX1 28/10/2013M. Battistin - Thermosiphon Project31

32. PVSS-UNICOS control ready Low T Chiller: PLC program done Water & Brine circuits: Functional Analysis done PLC program done Thermosiphon circuit: Functional Analysis done Thermosiphon circuit: PLC program done Low T Chiller: PLC program done Water & Brine circuits: Functional Analysis done PLC program done Thermosiphon circuit: Functional Analysis done Thermosiphon circuit: PLC program done L. Zwalinski (ATLAS) B. Bradu (EN/ICE) 28/10/2013M. Battistin - Thermosiphon Project32

33. Thermosiphon technical note (EDMS 1083852) released; 2 kW thermosiphon tests results (EDMS 1245465) released; Safety file (EDMS 1225594): – Descriptive part eng. check; – Demonstrative part on-going; – Documentation database on-going; Risk Analysis (EDMS 1165951); Leak rates analysis (EDMS 1250033) released; Functional analysis (EDMS 1101178) released; Commissioning procedures (EDMS 1291926) in work. Documentation 28/10/2013M. Battistin - Thermosiphon Project33 Complete revision of the EDMS structure – Cecilia Rossi

34. Thermosiphon on ID cooling I/O test:Nov 2013 Functional tests in by-pass:Dec 2013 – Jan 2014 Performance test in by-pass:Feb-Mar 2014 Compressors-Thermosiphon swap:Apr 2014 Thermosiphon on ID cooling tests:from May 2014 28/10/2013M. Battistin - Thermosiphon Project34 Main missing points: -Installation of the degassing sonar system on the condenser -Installation of the roof over the condenser -Installation of some cable between SX1 and SH1 roof

35. On behalf of the TS team ATLAS Alexander Bitadze Claudio Bortolin Cyril Degeorge Jan Godlewski Wieslaw Iwanski Cecilia Rossi Lukasz Zwalinski Iyri & Michail Sonar Team – G. Hallewell, S. Katunin EN-CV Anders Andersen Stephane Berry Pierre Bonneau Jose Botelho Direito Florian Corbaz Olivier Crespo Enrico Da Riva Daniel Lefils Stefano Moccia Sylvain Nichilo EN-MME Said Atieh, Aline-Marie Piguiet Didier Lombard + welder team Thanks for your attention. Any question? 28/10/2013M. Battistin - Thermosiphon Project35 HSE Phillip Santos Silva Pierre-Yves Buisson EN/ICE Benjamin Bradu GS Eliseo Perez