1. update on UT cooling system
LHCb COOLING MEETING
6 September 2017
Istituto Nazionale
di Fisica Nucleare
Sezione di Milano
update on UT cooling system
studies and test
in Milano
Simone Coelli
INFN Milano
For the Milano UT Group

2. TEST in progress with TRACI v.3
Test Plan:
re-test for cross-check the installed UT prototype stave , with Swagelok inlet flow restrictor (0,01 inch = 0,025 mm)
Trying to reach the nomina lflow rate (now by-pass open to go down with temperature; need to increase pump speed to go to ~ 1 g/s work in progress)
Test with nominal power on/off , several CO2 flow-rates
Then change the Swagelok flow restrictor with the Gasket laser orifice flow restrictors received (testing similar diameters) and repeat stave measurement
Then change UT protoytype stave under test: we have Central and Lateral types to test and compare pressure drop and thermo-hydraulic performances

3. TEST example of measurement in progress, lateral stave, 0,01” swagelok flow restrictor, new TRACIv.3

4. CHARACTERIZATION OF FLOW RESTRICTORS PRESSURE DROP
dedicated cold box setup for the laser orifices measurement
DEDICATED COLD BOX
DRY-AIR FLUXED CHAMBER
INTERNAL DEW POINT MEASUREMENT
CO2 COOLING SUPPLY FROM 2PACL TRACI COOLING UNIT
ARMAFLEX INSULATION
INLET AND OUTLET FLOW PRESSURE AND TEMPERATURE MEASUREMENTS
COLD BOX FOR CO2 TEST

5. COOLING CONNECTION DESIGN
CO2 DISTRIBUTION SYSTEM RE-DESIGNED TO FIT INTO THE AVAILABLE UT BOX SPACE
THERE IS FREEDOM:
TO CHANGE THE POSITION OF THESE WELDED JOINTS
POSITION THE MANIFOLD IN SPACE
START AT DIFFERENT POSITION THE HOSES IF THE MANIFOLD ARE PLACED AT A LONGER DISTANCE
MAKE THE MAIN FLOW CONNECTOR LENGTH
WE JUST NEED INPUT ON THE NEEDED MANIFOLD POSITION AND STARTING JOINTS, TO PRODUCE A FINAL DRAWING
CONCEPTUAL REPRESENTATION SWAGELOK ½» FLEXIBLE HOSES 18 « LENGTH PROPOSAL VCR CONNECTION

6. COOLING CONNECTION DESIGN
CO2 DISTRIBUTION SYSTEM RE-DESIGNED TO FIT INTO THE AVAILABLE UT BOX SPACE

7. COOLING CONNECTION DESIGN
CO2 DISTRIBUTION SYSTEM RE-DESIGNED TO FIT INTO THE AVAILABLE UT BOX SPACE

8. BACK-UP SLIDE

9. COOLING TEST SET-UP POWER SUPPLY DAQ (P, T) COLD BOX LOCAL BOX
C SNAKE PIPE
TITANIUM
COOLING LINES
C DUMMY STAVE WITH 16 HEATERS

10. CO2 connections reference
manifold
Exhaust collector
Connection pipes
Exhaust line
Stave
Cooling
pipes
Liquid line
Connection pipes
Supply distributor
manifold

11. CO2 connections MINIMUM cross sections calculation
MANIFOLDS
MANUFACTURING 9 WELDED ATTACHMENTS FOR THE FITTINGS REQUIRES A LARGER PIPE
I.E. 11 ID /15 OD mm
CHOSING THE NEARESTCOMMERCIAL STANDARD PIPE
I.E. ½ INCH -3/4 INCH
FOR OPTIMAL PRESSURE BEHAVIOUR
OUTLET PIPE => BEST IF LARGER I.E. ¾ INCH
INLET PIPE => ½ INCH

12. CO2 DISTRIBUTION COMPONENTS
DETAIL
9 STAVES MANIFOLD
316 Stainless Steel VCR Face Seal Fitting, 1/8 in. Female Nut
316 Stainless Steel VCR Face Seal Fitting, 1/2 in. Union Elbow Body
8 STAVES MANIFOLD
DISCUSSED AND APPROVED BY CO2 EXPERTS
CAD Carlo Gesmundo

13. DISTRIBUTION OF COOLANT TO THE STAVES
ANY STAVE INLET
LIQUID CO2
1/8 INCH VCR GASKET WITH ORIFICE FLOW RESTRICTOR
68 STAVES
=> 34 INLET VCR with ORIFICE for each each of the 2 half box
LATERAL «A» staves
small orifices
WE PLAN TO TEST
THE ORIFICES
(FROM LENOX LASER)
IN MILANO
WITH THE NEW TRACI (V.3)
TO MAKE A CHARACTERIZATION OF THE PRESSURE DROP VS MASS FLOW-RATE IN REAL CO2 OPERATIVE CONDITIONS
Central stave «C» and «B» larger orifice

14. FLUID-DYNAMIC CHARACTERIZATION
FLOW RESTRICTORS
FLUID-DYNAMIC CHARACTERIZATION
CO2 TEST
DEDICATED COLD BOX
DRY-AIR FLUXED CHAMBER, INTERNAL DEW POINT MEASUREMENT
ARMAFLEX INSULATION
CO2 COOLING SUPPLY FROM TRACI COOLING UNIT, MASS FLOWRATE MEASUREMENT
CO2 PRESSURE AND TEMPERATURE TRANSMITTERS BEFORE/AFTER COMPENT UNDER INVESTIGATION PT TT
FLOW RESTRICTOR
CO2 FLOW
Danilo Trotta
3D MODEL
Danilo Trotta
COLD-BOX PREPARED FOR THE TEST

15. FLEXIBLE HOSES OUTLET EXHAUST AND INLET LIQUID LINES
TO COPE WITH MOUNTING TOLERANCES AND THERMAL CONTRACTIONS
FROM SWAGELOK CATALOGUE
SUCCESFULLY TESTED IN CO2 TRACI TEST
½ INCH
VCR CONNECTION BOTH SIDES
=> THE SYSTEM IS DE-MOUNTABLE IF NEEDED

16. FLEXIBLE HOSES Swagelok Hose and Flexible Tubing ORDER SPECYFING
APPROPRIATE LENGHT
TO BE DECIDED
TO BE DECIDED
Swagelok Hose and Flexible Tubing CATALOGUE =>

17. PREVIOUS MODEL PRELIMINAR MODEL TO BE DETAILED MECHANICAL POSITION
PRELIMINAR STUDY
FOR THE DISCUSSION ON THE FLUID-DYNAMIC CONCEPT
WITH CO2 CERN EXPERT TEAM
LHCb CO2 cooling meeting
PRELIMINAR MODEL
TO BE DETAILED
MECHANICAL POSITION
TO BE DETERMINED
NOT RIGID CONNECTIONS
BUT FLEXIBLE HOSES

18. PROPOSAL TO CONVERGE ON AN ACCEPTABLE DESIGN
THE STEP FILES OF THESE COMPONENTS ARE ATTACHED INTHE INDICO PAGE
THEY CAN BE PLACED AND SUPPORTED INTO THE UT BOX CAD MODEL (MICHAL)
IN THE APPROPRIATE POSITIONS
CHOOSING A FEASIBLE FLEXIBLE HOSE LENGHT
FROM THE SWAGELOK CATALOGUE
THEN WE CAN DO THE DISTRIBUTION SYSTEM WORKING DRAWINGS FOR CONSTRUCTION
MANIFOLD-9-STAVES.stp
MANIFOLD-8-STAVES.stp
DISTRIBUTOR-4-SEMIPLANES-TT-PT.stp

19. COOLING SYSTEM COMPONENTS TEST
CO2 DISTRIBUTION SYSTEM
ALL THE OBJECTS ARE «PRESSURE COMPONENTS»
MAX DESIGN PRESSURE = 130 BAR (T.B.C. DEPENDING ON SAFETY VALVE OR RUPTURE DISK OPENING)
THE REQUIREMENTS FOR THE MANUFACTURING
FORESEE:
PRESSURE TEST (NITROGEN GAS)
HELIUM TEST AFTER PRESSURE TEST: WHAT IS THE ACCEPTANCE LEAK-RATE?

20. CO2 MEASUREMENT POINT PROPOSED OPTION
IN THE INLET AND OUTLET DISTRIBUTORS
CONNECTION FOR
CO2 TEMPERATURE TRANSMITTER
PT100 RODAX (TRACI LIKE)
CONNECTION FOR
CO2 PRESSURE TRANSMITTER
PIEZO-RESISTIVE KELLER (TRACI LIKE)