October, 2009 Cryogenics System Roberto Than October, 2009 Internal Review

October, 2009 Cryogenics System Cavity cooling:  cavities  HX / cold compressor bath  Quiet System: Vibration & microphonics  Heat transfer: SFTC or local evaporation  Quad cooling: 1.8K: Leads: HTS with shield flow as lead flow 4.5K: Leads: Normal leads. Sub-atmospheric system type/configuration Hybrid: Cold compression/ warm compression 100% cold compression New 4.5K 2 O’clock; Existing RHIC plant (1005) for Collider Use existing RHIC Plant for MeRHIC & RHIC New plant for both RHIC and MeRHIC

October, Cryogenics System SUPERFLUID HEAT TRANSFER: –SFT Conduction via pressurized superfluid  Heat exchanger every 3 cavities  ~ 8 inch Superfluid line  8 inch 12 Torr Vapor return line outside cryostat –2-  flow boiling (LHC) heat transfer from pressurized superfluid  Continuous heat exchanger / two-phase flow / vapor return –Saturation Line central vapor recondensing unit per 6 cavities

October, 2009 Cryogenics System LOADSDUTY  carnot W carnot POWER 1.8K REF5500 W MW SHIELD, 20K3000 W MW LIQUEFACTION12 g/s MW 5.7 MW LOADSDUTY 5-cell CAVITY1.8 K5000 W SHIELD19-20 K3000 W FPC’sLIQ10 g/s QUAD LEADSLIQ2 g/s QUADS1.8 or 4.5K~ 140 W

October, 2009 Cryogenics System-EXISTING RHIC PLANT LIFE CYCLE ISSUES Constructed in MW compressors 4600 g/s flow Oil bearing turbo-expanders 2 Redundant Trains 2 x 6 expanders (T1-T6) Phase 3 upgrade ( ) Added new JT-loop gas bearing expander T7 + new cold end HX’s Compressor bodies regular overhaul Life cycle issues –Motors (600 HP, 2200HP) –Oil cooler / aftercooler heatexchangers –MCC / Breakers Main Cooling Towers,qty 6 –(15 MW) Liquid helium storage  Gas storage 

October, 2009 Cryogenics System EXISTING PLANT BURDENED with Contingency SUB ATMOSPHERIC M RHIC PLANT M RHIC PLANT LIFE CYCLE ISSUES8 M NEW 4.5K PLANT BURDENED with Contingency SUB ATMOSPEHRIC M NEW M NEW 1005 for RHIC26 M

October, 2009 Estimate by phase with contingency

October, 2009 Labor hours, FTEs, $

October, 2009 Estimated Material $

October, 2009 BACKUP MATERIAL 10

October, Cryogenics System MeRHIC K 10 g/s LIQ 3000 W Shield SUPERFLUID SYSTEMS

October, SUB-ATMOSPHERIC SYSTEM 4 100% COLD COMPRESSION 2K 4600 W Thomas Jefferson National Lab 2K 2400 W Spallation Neutron Source HYBRID COMPRESSION 1.8K 2400 W LHC –CERN 1.8K 5000 W BNL MeRHIC SUBATMOSPHERIC SYSTEM 4.5K plant 4.5K plant SUBATMOSPHERIC SYSTEM

October, SUB-ATMOSPHERIC SYSTEM 4 SHIELD FPC INTERCEPT 4.5K PLANT LN2

October, Cryogenics System.2 LOADING 4.5K PLANT & SUB-ATMOSPHERIC SYSTEM RHIC MeRHIC REFLIQSHIELDLOADLIQ SUBATM- WARM LOADW TK Patm ExJ/g TK Patm ExJ/g REFLIQSHIELDCOLDCOMPLIQVACCOMP  Ex J/g flowg/s WcarnotMW  carnot WactualMW

October, Cryogenics System System Level Design: 1.8K system –1.8K SUB-ATMOSPHERIC SYSTEM  Cold compressors single point failure –Redundant train –On shelf spare –Cryogenic distribution system / Superfluid heatexchangers Interface / Integration to 4.5K Plant –Return lines to RHIC Collider cryolines –Integration with RHIC main cryo plant –RHIC main cryo plant upgrade

October, Cryogenics System RHIC CRYO PLANT UPGRADE: –Rotoflow Expanders 5/6 to gas bearing expander –Cold (<10K) Heatexchanger stack HX upgrade (Phase 3 HX’S too small) –JT-Expander T7 upgrade / or 2 nd JT-expander configuration –Tee-in for 20K return flow from 2 O’Clock CR/ U lines.