Michele Battistin Elena Perez Rodriguez 10 November 2010 Detector Cooling Project - advancement status of Work Package N3 Thermosiphon project Michele Battistin Elena Perez Rodriguez 10 November 2010

Index Introduction Basic design Chiller Piping installation and integration Other tasks: control, infrastructures Planning and cost estimation Conclusion

Introduction The Thermosiphon project started in March 2009 Objective: consolidate the ATLAS ID evaporative station Milestones achieved Mini-Thermosiphon Preliminary study and tests 2kW Thermosiphon Design Purchase Control Construction Perform tests Full Scale Thermosiphon Basic design and technical note Integration Cost estimation Planning and organization of piping work Chiller purchase process Detailed design and selection of components

Basic design Low temperature Chiller condenser The thermosiphon is the baseline solution for the consolidation of the ATLAS ID evaporative cooling system. The main design parameters are Power: 60 kW @ -25 °C Pressure and temperature at the rack: 500 mbar, 20 C Flow at full power: 1.2 kg/s The present compressor system will remain as full power back up cooling source. liquid tank pneumatic valve Surface pneumatic valve USA15 others manual valve 4 liquid lines PR Heater thermal screen UX15 USA15 From compressors dummy load pixel manual valve 6 X SCT 4 gas lines BPR manual valve To compressors

P&ID of the Thermosiphon

P-h diagram A E C B D F I G H J L K Pressure [bar] Enthalpy [kJ/kg] Liquid heater A-B Condensation B-C Hydrostatic Height C-D Heating (from return gas) D-E Heater E-F Pressure Regulation F-G Sub-Cooling on detector HX G-H Pressure Drop & Capillary H-I Evaporation I-J Heating on Sub-Cooling HX J-K Superheating K-L Pressure Drop (PReg & return line) L-A Sub-Cooling (from liquid supply) liquid line to detector HEX subcooling Head Capillary pressure drop HEX recuperation evaporation heater condensation Gas cooler ∆h=48kJ/kg ∆h=122kJ/kg

Chiller: basic solution C3F8 condenser 180 kW -70 °C Back-up 50 kW -20 °C Brine circuit Redundant pumps Primary water 25°C liquid tank First 50% power chiller C6F14 brine circuit Surface Second 50% power Chiller First cycle for Emergency diesel powered USA15 cavern Third 50% power Chiller First cycle for Emergency Diesel powered Air cooled UX15 cavern ATLAS ID Detector

P&ID of the basic solution

Chiller: alternative solution C3F8 condenser 180 kW -70 °C Back-up 50 kW -20 °C Primary water 25°C Brine circuit Redundant pumps liquid tank C6F14 brine circuit Main 100% Redundant chiller Surface USA15 cavern First water cooled back-up chiller Diesel powered Running only in case of main chiller failure Second air cooled back-up chiller Diesel powered Running only in case of first back-up chiller failure and water maintenance periods UX15 cavern ATLAS ID Detector

P&ID of the alternative solution

ATLAS reviewing process 1st Thermosiphon review: 6th July 2009 Pre-design and general lines of the project. Indico agenda and documents here. 2nd Thermosiphon review: 1st October 2009 Detailed design for the 2 kW Thermosiphon, mini-thermosiphon and blends. Indico agenda and documents here. 3rd Thermosiphon review: 28th May 2010 Advancement status of Thermosiphon project, oil free centrifugal compressors and sonar sensor. 4th Thermosiphon review: next week (?) Project Readiness Review.

Chiller purchase status Market survey Evaluation visits to suppliers Invitation to Tender Document prepared Specification meeting Offers from selected firms Reception Evaluation Department proposal and peer review Finance committee 16th March

Market survey results Companies Qualification criterias Qualified Name Country of origin Well balan ced Visit Criteria § 3 Criteria § 4.1 Criteria § 4.2 Criteria § 4.3 Criteria § 4.4 Criteria § 5.1 Criteria § 5.2 Criteria § 6 Criteria § 7 Administrative situation 2 references Industrial PLC use In-house design office Workshop Turnover Employees Quality Language Angelantoni Italy yes Known company YES Idom Spain no NO Cofely Refrigeration Germany 30/Sept (Lindau) GEA Matal / Technofrigo France 17/Sept (Berlin) Herco 7/Oct (Düsseldorf) Johnson controls (York) Switzerland 8/Sept (Visp) J&E Hall England 14/June (London) Telstar 3/Sept (Barcelona) 1 reference ?

Piping installation Integration Calculations Make 3D models (Alexander Bitadze) Approval of the integration (Olga Beltramello and Tatiana Klioutchnikova) Calculations Stress and supports calculations (Mael Devoldere and Delio Duarte Ramos) Earthquake calculations Purchase of material (Kirill Egorov) Supports Pipes, accessories and insulation Preparation of material Mechanical preparation for welding (Said Atieh) Cleaning of the pipes before installation (Marina Malabaila) Installation (Daniel Lefils and Elena Perez Rodriguez) Installation of supports (Jan Godlewski team) Installation of pipes and insulation (Said Atieh)

Integration drawings ATLICSC_0073 ATLICSC_0074 ATLICSC_0075

Other tasks (in parallel) Control UNICOS for the Thermosiphon and Chiller. Draft for the functional analysis in progress. Infrastructure Search for primary water for the chiller system. Upgrade of the electrical network for standard and diesel power supply.

Planning Time Design and integration Chiller system and brine circuit Autumn 2010 Winter 2010/2011 Spring 2011 Summer 2011 Autumn 2011 Winter 2011/2012 Design and integration Complete basic design and integration Chiller system and brine circuit Invitation to tender process Award the contract Manufacture Supply and installation Tank/condenser Detailed design Demmande d’offre + purchase C3F8 piping Supports and earthquake calculs Purchase of material Installation of the pipes By-pass Installation in the cavern Instrumentation and control Functional analysis Purchase of hardware Programming Electricity and Pneumatic installations Study the requirements Improve UPS/Standard supply if needed Commissioning Tests with by-pass

Cost estimation Description Cost estimation Primary water 40 40  Chiller system 800  Brine circuit 50  Tank/condenser 50 C3F8 piping Piping 180 Recuperation heat exchanger 15 Heaters before HEX - 15 kW Heater after the HEX - 60 kW 20 Test dummy load 10 By-pass   By-pass piping Dummy load - 25 kW Instrumentation Pneumatic system Control Civil engineering Roof modification PJAS 100 Contingency Total 1500

Conclusions The Mini-Thermosiphon has proved the working principle for the consolidation. The 2 kW Thermosiphon will provide results for the control and detailed design. The Full Scale Thermosiphon is already well advanced Basic design is done Planning and cost estimation have been presented Purchase has started Piping installation has been organized

Thank you for your attention Any questions ?