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Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment. Status by Christine Darve and Yuenian Huang US-CERN Videoconference Monday 11 Sept 2000. Presentation head lines. Overview on the US-IT-HXTU project Goal Previous Measurements

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Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

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  1. Inner Triplet Cryostat External HeatExchanger Tests - US-IT-HXTU Experiment Status by Christine Darve and Yuenian Huang US-CERN Videoconference Monday 11 Sept 2000

  2. Presentation head lines • Overview on the US-IT-HXTU project • Goal • Previous Measurements • Thermal Model of the Inner Triplet • Commissioning • Preliminary results • Heat eXchanger Test Unit Performance • LHC Nominal and Ultimate Conditions • Limitation of the set-up • Status CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  3. Goal • Validation of the LHC-IR Inner Triplet Quad cryogenic system. • Specification: • ~ 200 W for 30 m Interaction Region @ Inner Triplet • ~ 40 W for 107 m Typical Arc cooling loop • Proposition: • => Larger HX => Proposed 97/85 mm corrugated OFHC copper HX • => Location outside and parallel to the Cold Mass • => Calculation/estimation for the performance of the design external HX. • Measurement: • External Heat Exchanger for the full-scale US-IT-HXTU • (30 m, 1.4% slope, 800 liters of He II pres.) CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  4. Previous measurements • “The Superfluid Helium Model Cryoloop for the CERN Large Hadron Collider” • CERN-LHC-Note 233 (1993, CERN, 20m, OD43, t=0.5, Cu DHP, corrugated, 0-1.4% slopes) • “Thermal characterization of the He II LHC exchanger tube” • CERN-LHC-PR-232 (1998, CERN, 0.1m, OD58, t=2.3, Cu OFHC, surf. treat., smooth) • ” Experimental Investigations of He II Heat Transfer through a Short Section of LHC Inner Triplet Quadrupole Heat Exchanger” • Sub ASC (2000, FNAL, 0.1m, OD96-123, t=0.7-0.5, Cu OFHC-Br., surf. treat., corrugated) • More thermohydraulic behavior measurements • “Latest developments on HeII Co-Current Two Phase Flow Studies” • Adv. Cryo. Eng. 43-1998 (CEA, 86//1.3m ,ID40//20, smooth , 1.4% slope helicoidal) • “HeII Phase Flow in an Inclinable 22 m long Line” • CERN-LHC-PR-328 (1998, CEA, 22m, ID40, smooth , 0-2.8% slopes) CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  5. Inner Triplet CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  6. Thermal Model of the Inner Triplet CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  7. Heat flow path DT6 DT5 DT4 DT3 DT2 DT1 Inner Triplet US-IT-HXTU CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  8. Commissioning • At room temperature • Pressure test: 5 bar than 2.5 bar abs • Leak check: 10-8 mbar l/s (@120 mbar) • Mechanical calibration of the controlled valves • At cryogenic temperatures • Time constants for stabilization and LHe velocity measurement • Instrumentation check • Controlled valves PID parameters fine-tuning (automatic run) • Zeroing: • Recalibration of thermometers • Calibration of the turbine mass-flow meter • Calibration of the JT opening • Static heat load CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  9. Instrumentation • Thermometers • Pressure transducers • LHe level transmitters • Heaters • Controlled valves • Pressure safety valves • Mass-flow meter • JT valve • Rough pump + Turbo molecular pump • Vacuum indicator • ~85 acquisition channels/97 devices CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  10. Process and Instrumentation Diagram Figure 2 CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  11. Recalibration of thermometers Thermometer Error (Enrique Blanco) CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  12. Calibration of the turbine mass-flowmeter • Calibration of the JT opening CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  13. Static load - Theoretical • Qstatic= Qs1 + Qs2 + Qrts_cm + Qcts_cm  =>34 watt • Qs1 : transfer in superfluid HeII / inlet • Qs2 : transfer in superfluid HeII / outlet • Qrts_cm : radiation from the thermal shield to the cold mass • Qcts_cm : solid cond.from the room temperature to the cold mass, via the support spiders • Conduction in superfluid HeII => 18 Watt • Q/s = [(X(Tf)-X(Tc))/l]^0.29 • Assumptions : • Thermal lenght = 1 cm • Solid  Conduction for the G10 spiders =>4 Watt • Assumptions  : • Contacts : area= 0.5 in. x 0.5 in, length=4 in • Radiation from thermal shield to cold mass => 12 Watt • Assumptions  : • Tts/Tcm =110 K / 1.88K Qrts_cm=E.Surf.sig.(Tts4-Tcm4) CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  14. Static load - Experimental 34 watt CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  15. Measurement method • Parameters to fix for a data measurement • Saturated pressure • Heat loads for the magnet simulation • JT opening // mass-flow • Output parameters • Temperature display • Wetted area • Performance of the HXTU • Tools for the measurement/indicator • LHe level, LT9304 • Temperature transient, TT1121b HXTU Evolution of the heat transfer from heaters to the dyn. saturared HeII than toward the CCU • Steady-state measurements • Minimal wetted area • Temperatures diff. < 2mK CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  16. Measurements performed between 07/17 and 08/02 • 36 steady-state data points • Psat=16 mbar (Tsat=1.790 K) x 9 meas. • 1 unbalance cond.(3*20watt+80watt) • 2 unstable measurements • Psat=18 mbar (Tsat=1.820 K) x 10 meas. • Psat=19 mbar (Tsat=1.840 K) x 5 meas. • Nominal condition (247watt) • Psat=21 mbar (Tsat=1.870 K) x 11 meas. • Psat=24.5 mbar (Tsat=1.915 K) x 1 meas. • Ultimate condition (315 watt) • After 2nd of August • Psat=32 mbar (Tsat=2.007 K) x 6 meas. CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  17. Steady state measurement #12 (201W, 21mbar)- Evolution of temperature/ indicator LT9304 CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  18. Parameters evolution : Data # 12: Psat=21 mbar, Qm+s=201W CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  19. Parameters evolution : Data # 12: Psat=21 mbar, Qm+s=201W CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  20. Steady-state heat transfer - ex of temperature display CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  21. Steady-state heat transfer - ex. of temperature diff. display CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  22. Total Heat Loads in the Inner Triplet at IP5 or IP1 by Tom Peterson, 7 March 2000 • Total integrated heat load • to Inner Triplet : • Nominal Condition = 211 watt CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  23. Steady-state heat transfer - Nominal condition Nominal Condition : 211 watt + 34 watt (static) CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  24. Steady-state heat transfer - Nominal condition Nominal Condition : 211 watt + 34 watt (static) CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  25. Total Heat Loads in the Inner Triplet at IP5 or IP1 by Tom Peterson, 7 March 2000 • Total integrated heat load • to Inner Triplet : • Ultimate Condition = 472 watt CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  26. Steady-state heat transfer - Ultimate condition Ultimate: 1.5 x Nominal: 316 watt CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  27. CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  28. CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  29. CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  30. Plot send by Rob van Weelderen (08/25/00) CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  31. Magnet side HX side Ultimate condition: Psat=24.1 mbar CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  32. Magnet side HX side CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  33. Limitation of the set-up • Thermometer calibrations • Large off-set (P, pos) • Accuracy • Power suppliers overloaded • Limitation in tension, Resistance(T) • Mass-flowmeter accuracy: FT9214, acc. 20%, FT697 @RT • JT valve opening CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  34. CCU • Stability at high flow • Broke down of the Air Liquid CCU • Several users • Absolute pressure read-out • Differential pressure • JT heat exchanger Pressure drop CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  35. Conclusions & Status • External LHC IR Inner Triplet Quad. Heat Exchanger validated. • Performances: • Nominal 247 W : DT5 = 33 mK, • Ultimate 315 W : DT5 = 46 mK , (Nominalheat load x1.5) • Wetted area : 20-25 % , Kcoeff. 893Wm-2 K-4 • http://www-bdcryo.fnal.gov/darve/heat_exchanger/instrumentation.html To do... • Data analysis (Fermi): Predictive model to improve and hydraulic study • Recalibration of thermometers (CERN) • Control investigation (CERN) • Measurements at 19 mbar (CERN) • Measurement for another Ultimate Condition (CERN) CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  36. Acknowledgment • General : Tom Nicol, Rob. Van Weelderen, Enrique Blanco, Alain Bezaguet • CCU : Bruno Vuillerme and his team • Installation of the US-IT-HXTU: Roger Losserand, Edward Fernandez, Sebastien Pelletier, Bernard Bochaton, Raphael Vuillermet • Advises: Tom Peterson, Bernard Rousset, Philippe Lebrun CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  37. More data CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  38. Results from the Small Scale Heat eXchanger Test CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  39. Results from the Small Scale Heat eXchanger Test Results of the SSHX permit to deduce the wetted area of the full scale HXTU Bronze sample OFHC OFHC+ HCl CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  40. Results from the Small Scale Heat eXchanger Test CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  41. Estimation/calculation for the Nominal condition #22, 247 W @20 mbar mbar CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  42. Measurements of the HXTU performance: Ex. #22: 247 W, 19 mbar CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  43. Measurements of the HXTU performance: Ex. #36: 121W, 16mbar CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  44. Estimation/calculation for the Ultimate condition #14, 315 W @24.1 mbar CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  45. Temperature distribution for unbalance condition: Ex. #20: 182W, 16mbar Power unbalanced CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  46. Measurements of the HXTU performance CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  47. Measurements of the HXTU performance CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  48. Measurements of the HXTU performance CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

  49. Measurements of the HXTU performance CD-09/11/00 Inner Triplet Cryostat External Heat Exchanger Tests - US-IT-HXTU Experiment

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