M. Battistin, M. Bosteels, M. Pimenta, P. Tropea

22-Jan-04 P. Tropea - JCOV 1

TS-CV-Detector Cooling

Design, construction and Design, construction and installation of a double loop installation of a double loop

fluorocarbon 150 kW cooling plant fluorocarbon 150 kW cooling plant for the CMS Tracker and Preshower for the CMS Tracker and Preshower

detectorsdetectors

M. Battistin, M. Bosteels, M. Pimenta, P. Tropea

IT3230/ST/CMSIT3230/ST/CMS



CMS Tracker and Preshower cooling CMS Tracker and Preshower cooling plant General schemeplant General scheme

Compressors

Condenser

Chilled water

To Silicon Stripand Pixelcooling circuits

Primary cooling

3 standardcooling units

To ThermalScreen andPreshowercooling circuits

4 cooling units withemergency fridge

Secondary cooling

USC55

UXC55



Primary cooling plant functional Primary cooling plant functional schemescheme

E-1

E-2

V-1

E-3

V-2

V-3

V-4

V-5

V-6

E-4

E-5

V-7E-6

V-8

I-1

V-9

E-7

V-10

V-11 E-8

V-12V-13

E-9

V-14V-15

E-10

V-16

V-17 E-11

V-18V-19

E-12

V-20V-21

V-22 I-2

I-3P

I-4

I-5

T

I-6

W

I-7

I-8

P

Cooling systemCooling system: evaporative

FluidFluid: R410A

PowerPower: 150 kW

InstallationInstallation: USC55, zone CV

Chilled water

R410A to/from UXC55



Primary cooling plant: USC55 zone CVPrimary cooling plant: USC55 zone CV

• CompressorsCompressors: 2 or 3, oil free, two stages, piston, regulation system 0÷100%

• CondenserCondenser: running chilled water and R410A, T_cond= 30°C

• Storage tankStorage tank: equipped with a weight transmitterweight transmitter and a heaterheater

• Regulation valveRegulation valve: for chilled water flow rate regulation with respect to the pressure, measured by the pp transmittertransmitter on the tank

• Filter, Filter, mechanical

• Buffer tankBuffer tank

HYDRAULIC EQUIPMENTSHYDRAULIC EQUIPMENTS



Primary cooling plant: USC55 zone CVPrimary cooling plant: USC55 zone CV

• Compressed air

• Electrical power distribution

• Chilled water circuit

REQUIRED SERVICESREQUIRED SERVICES

ELECTRICAL & CONTROL EQUIPMENTSELECTRICAL & CONTROL EQUIPMENTS

• Electric power distribution rack for compressors

• Electric power distribution rack for detector cooling units (cabling to the UXC55)

• Control racks with electronics (PLC)

• Control racks for electric/pneumatic signal conversion



USC55 zone CVUSC55 zone CV



USC55 zone CVUSC55 zone CV



Electrical and control rack installationElectrical and control rack installation

Control rack: 470 valves for electrical/pneumatic signal conversion

Electrical power distribution rack & electrical part of the control racks

3 & 4 m

0.9 m2.5 m

0.9 m



USC55USC55UXC55UXC55

Total pipe length up to first floor balconies, at the service Total pipe length up to first floor balconies, at the service tunnel: tunnel:

90m “near side” – 120 m “far side”90m “near side” – 120 m “far side”

Piping between USC55 and UXC55Piping between USC55 and UXC55



Fluid: liquid C6F14, cooled by R410A arriving from USC55

7 Cooling Units: 2 x Silicon Strip

1 x Pixel

2 x Thermal Screen

2 x Preshower

Secondary cooling plants: detector unitsSecondary cooling plants: detector units

PERFORMANCES DEMANDEDPERFORMANCES DEMANDEDFlow rate Δ P T

l/h bars °C kW min kW max

Silicon Strip 1 SS1 33638 6 -30 38 52Silicon Strip 2 SS2 33638 6 -30 38 52Pixel PX 3564 5 -20 9.2 10Thermal Screen 1 TS1 3168 4 -10 5 7Thermal Screen 2 TS2 3168 4 -10 5 7Preshower 1 PS1 6480 7 -20 13 13Preshower 1 PS2 6480 7 -20 13 13

Total 121.2 154

Cooling Units NamePower



Detector unit layout example: Pixel Detector unit layout example: Pixel unitunit

CP1

Control rack

CP2

E-1N2

V-1E-2

E-3

V-2

V-3

V-4

V-5

E-4

E-5

V-6

V-7

To CP1

To CP1

To CP2/I-8CP1/I-10

From/ToCompressors

Cool box

V-8

From/ToElectronics

V-9

V-10

V-11 I-1

V-13

V-14

I-2

T

V-15

V-1

6

V-1

7

E-6E-7

V-18

I-3I-4 I-5 I-6

V-27To CP2/I-9CP1/I-11

To CP1/I-7

I-7

I-8 I-9

I-10

P

I-11

P W

I-12

DP

I-13

DP

I-14

DP

I-15

DP

ToCP1/I-12

ToCP1/I-13

ToCP1/I-14

ToCP1/I-15

I-16

DW

FII-17

P

I-18

V-28

E-8

V-21

V-22

V-23 V-25

V-24V-26 V-20

V-19

V-29 V-12

COLD BOXCOLD BOX

CONTROL RACK for CONTROL RACK for INSTRUMENTATIONINSTRUMENTATIONR410A from/to UXC55



Detector units in the UXC55Detector units in the UXC55

• Tank: Tank: low pressure reservoir, depression created by means of a vacuum pumpvacuum pump

• PumpPump: magnetic coupling

• Alumina filtersAlumina filters: for eventual acids formation

• Evaporator:Evaporator: R410A evaporates at -45°C, C6F14 is cooled to the required service temperature (-30°C ÷ -10°C)

• Expansion valveExpansion valve: regulates the flow rate of R410A arriving to the evaporator, with respect to the temperaturetemperature measured at the distribution

• Heat exchangerHeat exchanger: to sub-cool the liquid R410A

• Back pressure regulatorBack pressure regulator: to maintain the distribution pressure constant

HYDRAULIC EQUIPMENTSHYDRAULIC EQUIPMENTS



Thermal Screen and Preshower units: Thermal Screen and Preshower units: EPSEPS

I-2

E-2

E-3

V-2

V-3

V-4

V-5

E-4

E-5

V-7

To CP2/I-5CP1/I-7

From/ToCompressors

Cool box

V-8

V-10

V-11

V-12

V-1

3

V-1

4

E-6E-7

V-15

V-16To CP2/I-6

CP1/I-8

To CP1/I-9

To CP1

To-CP1

-CP1/ I-10...I-17

From/ToElectronics

V-17 I-1

V-19

E-8

V-20

E-9

E-10

I-3

I-4

T

I-18

DW

FII-20

P

I-19

V-28

V-6 V-9 V-22

V-18

Emergency fridge unit (EPS)Emergency fridge unit (EPS)

Electrical heater Electrical heater for T regulationfor T regulation



Detector unit distribution circuitsDetector unit distribution circuits

Shut-off valve withmetering screw

Calibrated orifice

Schrader valve

Cold C6F14 f rom evaporator (T= -30 °C)

Heated C6F14 f romdetectors or thermal screen

Optional fi lter




• Shut-off valve: Shut-off valve: pneumatic, normally closed shut-off valve, with additional metering screw

• Primary element (calibrate orifice)Primary element (calibrate orifice): used to measure the flow rate by means of a pressure transducer (shall induce a pressure loss at nominal flow rate of less than 100 mbar)

• Small piping for instrumentation (before and after the orifice), equipped with Schrader valves on the control rack

• Shut-off valveShut-off valve: pneumatic, normally open

• Non-return valveNon-return valve: by-pass for the shut off valve in case of overpressure on the detector circuit

DISTRIBUTION LINES HYDRAULIC EQUIPMENTSDISTRIBUTION LINES HYDRAULIC EQUIPMENTS



REQUIRED SERVICESREQUIRED SERVICES

INSTRUMENTATION on the RACKSINSTRUMENTATION on the RACKS

• Differential pressure transmitter (piezoelectric):Differential pressure transmitter (piezoelectric): to be connected to the Schrader valves for flow rate measurements

• ManometerManometer

• Scale transducerScale transducer

• Compressed air (valve power)

• Electrical power

• Waste water recuperation network




Detector units overall dimensionsDetector units overall dimensions

Length Height Depth

mm mm mm

Silicon Strip (each plant) 4500 2700 800Thermal Screen (each plant) 2000 2700 800Preshower (each plant) 2000 2700 800Pixel 2000 2700 800

Maximum dimensionsCooling unit

DN40 - PN10

CASTER MTA2020

Silicon StripSilicon Stripcooling unitcooling unit

Resume for Resume for all cooling unitsall cooling units



Detector units on UXC55 first floor balconiesDetector units on UXC55 first floor balconies

R410A from/to USC55R410A from/to USC55



CMS Tracker and Preshower cooling CMS Tracker and Preshower cooling plantplantPLANNINGPLANNING

IT-3230-TS-CMS outIT-3230-TS-CMS out 6 January 046 January 04

Bidder’s conferenceBidder’s conference 23 January 0423 January 04

Tender answers 15 March 04

Finance committee June 04

Contract signature July 04

Design meeting September 04

Complete installation at contractor’s premises February 05

Performance test at contractor’s premises May 05

Cavern installation June 05

Commissioning December 05



CMS Tracker and Preshower cooling CMS Tracker and Preshower cooling plantplant

CONTROL SYSTEMCONTROL SYSTEM

Demanded precision on the set temperature +/- 1 KDemanded precision on the set temperature +/- 1 K

Demanded maximum overshoot for a step perturbation +/- Demanded maximum overshoot for a step perturbation +/-

3 k3 k

ADVANCED CONTROL SYSTEMADVANCED CONTROL SYSTEM

demanded as an option for each detector cooling unitdemanded as an option for each detector cooling unit

Documents

M. Battistin, M. Bosteels, M. Pimenta, P. Tropea