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NA62 Gigatracker cooling 28 th Oc tober 2011 EN/CV Piero Valente, Michele Battistin

NA62 Gigatracker cooling 28 th Oc tober 2011 EN/CV Piero Valente, Michele Battistin. Thermodynamic requirements. Fluid : C 6 F 14 Total required cooling power : 300 W (safety factor=2) Number of distribution loops = 3 Supply temperature = -25 C Loop temperature stability = ± 0.5K

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NA62 Gigatracker cooling 28 th Oc tober 2011 EN/CV Piero Valente, Michele Battistin

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  1. NA62 Gigatracker cooling28thOctober 2011EN/CVPiero Valente, Michele Battistin

  2. Thermodynamic requirements • Fluid: C6F14 • Total required cooling power : 300 W (safety factor=2) • Number of distribution loops = 3 • Supply temperature = -25C • Loop temperature stability = ± 0.5K • Temperature difference between loops = 2 K • Design pressure: 16 bar • Pressure drop : to be defined by GTK collaboration

  3. User requirements • VDF pump power supply for smooth start-up sequence • PVSS-UNICOSS control and supervision • Control cupboards installed in the remote protected area (200 m far) • Automatic control of loop flowrate • Automatic control of loop temperature • Remote control of delivery temperature and flow rate for each loop • Interlocks for high delivery pressure • Fully redundant operation: double chiller, heat exchanger and circulation pump • Oil free cooling station • Pneumatically actuated valves • Cooling station to be tested in Meyrin site

  4. Proposed solution • HCFC refrigerant redundant primary chiller (-40 °C) • Chiller overall cooling power: 1.5 kW (including heat losses) • C6F14 total mass flow = 0.330 kg/s (pre-design figure) • Three main pipelines (OD 12) carrying 0.100 kg/s C6F14 flow each • Three smaller pipelines (OD6) carrying a 0.011 kg/s C6F14 flow to each detector • A heat exchanger for each line, located ≈1 meter close to the detector, will guarantee operating temperature setting of -25C

  5. Proposed solution : P&I Detector pipelines OD 6 Main pipelines OD 12

  6. Planning • System design ……………………………………. November-December2011 • Procurement ……………………………………… January 2012-March 2012 • Installation ………………………………………… April-June 2012 • Tests…………………………………………………… July-September 2012 • Commissioning…………………………………… October2012 • Engineering specificationapproval …….. End October2011

  7. Budget • Electrical and control equipments ….……..30 kCHF • Manpower………………………………….….……..40 kCHF • Total180 kCHF • Material ………………………………………………..110 kCHF

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