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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 - PowerPoint PPT Presentation
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NA62 Gigatracker cooling28th October 2011
EN/CVPiero Valente, Michele Battistin
1
Thermodynamic requirements – Fluid: C6F14
– Total required cooling power : 300 W (safety factor=2)– Number of distribution loops = 3– Supply temperature = -25C– Loop temperature stability = ± 0.5K– Temperature difference between loops = 2 K– Design pressure: 16 bar– Pressure drop : to be defined by GTK collaboration
2
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
3
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 -25C
4
Proposed solution : P&I
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Main pipelines OD 12
Detector pipelines OD 6
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Planning– Engineering specification approval …….. End October2011
– System design ……………………………………. November-December 2011
– Procurement ……………………………………… January 2012-March 2012
– Installation ………………………………………… April-June 2012
– Tests…………………………………………………… July-September 2012
– Commissioning…………………………………… October 2012
7
Budget
– Material ………………………………………………..110 kCHF
– Electrical and control equipments ….……..30 kCHF
– Manpower………………………………….….……..40 kCHF
Total 180 kCHF