1. Tracker cooling loop “check out” draft for discussion
22 August 07
P. Tropea
22 August 07
Cooling segment characterization

2. Cooling segment characterization
CONTENTS
The cooling plant layout
Mapping of cooling circuits
Pressure test
Continuity test
First circulation: balancing, Dp & DT measurements
22 August 07
Cooling segment characterization

3. COOLING PLANT GENERAL LAYOUT
3 cooling loops in cascade (chiller, brine, fluorocarbon)
7 detector cooling unit (2 for Silicon Strip Tracker, 2 for Thermal Screen, 1 for Pixels and 2 for Preshower)
22 August 07
Cooling segment characterization

4. DETECTOR COOLING UNIT LAYOUT
22 August 07
Cooling segment characterization

5. Cooling segment characterization
DETAILS OF MANIFOLDS
MAIN DISTRIBUTION LINE
SINGLE COOLING LOOPS
Manual regulation valve to set flow rate
Cold C6F14
Pneumatic shut-off valves
Detector
Calibrated orifice to allow flow rate measurement on the basis of the differential pressure.
Return C6F14
22 August 07
Cooling segment characterization

6. Cooling segment characterization
Mapping of circuits
All info from Linda and the cooling system collected (thanks to Paolo F.) in: ..\Public\TkCooling\070810_TkCoolingMapping.xls
On each cooling plant: the Scraeder valves on inlet and outlet are labeled with the cooling plant name and the Tracker name of the cooling loop (thanks to Paolo again!)
N.B.: There is no symmetry between cooling plant distribution and sectors, one cooling plant serves both +Z and –Z Tracker sides!
22 August 07
Cooling segment characterization

7. Mapping on top of patch panels
22 August 07
Cooling segment characterization

8. Cooling segment characterization
Pressure & leak test
Line by line (inlet or outlet, # x 180), ok up to 10 bars
PLC: all lines locked, cooling plant in STOP mode (better)
Cooling plant: check valves not installed, pipes plugged
Ar supply on valve SV-I1#, manometer on valve SV-I2# for inlet pipes
Manifold with both Ar and manometer on SV-O# for outlet pipes
Equipment needed: Ar supply and manometer with schraeder valve, small manifold with both
22 August 07
Cooling segment characterization

9. Connectivity test – with gas
One complete circuit at a time (# x 90)
PLC: all lines locked, cooling plant in STOP mode (better)
Cooling plant: check valves not installed, pipes plugged
N2 supply on valve SV-I1#
Manometer on valve SV-O#
Equipment needed: N2 supply and manometer with schraeder valve
22 August 07
Cooling segment characterization

10. First circulation tests
Set a preliminary flow regulation (temporary or not depending on the nb of circuits available)
Measure Delta p along complete circuit
Measure Delta T
Installation of safety valves
At least a few circuits completed
Temperature gauges available outside and inside Tk
22 August 07
Cooling segment characterization

11. Draft procedure for balancing and Dp reading
PLC: Stop mode, all circuits locked
PLC: Run mode, wait until the temperature is stable (~2 hours if starting from scratch, ~10 minutes if cooling plant in stand-by)
CP: Close manual regulation valve
CP: Connect differential pressure transmitter on SV-I1# and SV-I2#
PLC: unlock the circuit, then open it after a couple of minutes with no alarms
CP: open manual valve up to Dp = nominal (PLC reading, nominal values on mapping)
CP: record manual valve position
CP: disconnect Dp transmitter, put two manometers on SV-I2# and SV-O#, record
22 August 07
Cooling segment characterization

12. Draft procedure for DT reading
PLC: Run mode, T stable, nominal flow (ok if immediately after balancing and Dp measures)
CP: Install T gauge on return pipe inside CP
TK: Switch on heat source for that circuit
PLC: Register time to stabilize T
PLC & CP & TK: Once T stable, record T supply of the cooling plant, T return on the pipe, every possible T inside the TK!
22 August 07
Cooling segment characterization

13. DETECTOR COOLING UNIT REQUIREMENTS
22 August 07
Cooling segment characterization