IBL CO2 cooling flexible transfer line design status 10 April 2013

AIDA Traci commissioningLHCb CO2 cooling meeting18 March 2015

Kamil Wojdyla, Lukasz Banasik, Nicola Spadavecchia, Tomasz Kucharski, Piotr Dziurdzia, Maciej Ostrega, Lukasz Zwalinski, Bart Verlaat1Traci-3 P&ID21/8AV104HX101FL101PT102TT102SC102PT101TT101SC101FT103FL103

AC202ncHX201MV205PT205MV202EV203TX204GP201EH204, TT204EH205, TT205EH110TT110AC110PT110BD110PT103TT103TT106LP101.,AV105MV104MV105SV105Chiller unitCO2 unitCO2 local box1/41/81/81/41/4FlexlineExperiment connectionExperiment vacuuming and ventingMV110TT204Traci-3 update featuresTraci-3 has been updated wrt Traci-2PLC + touchscreen controlHNP-ceramic pump

Traci-3 build from a revised designSerial production oriented3

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Traci-2Touch screen user interfaceTraci-3 build in series (4) from a revised drawing package4

Traci-3 internal5

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CO2 foam boxHNP 11558 pumpAccumulatorFlow meterPLCTouch screenHNP pump and chiller6

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Chiller unitPump motor outside foam boxMounting and sealing flangeCold pumpFilterExperiment connection box (Local box)7

Liquid outVapor returnExperiment vacuum and ventingExperiment flow control valveExperiment shut-off valveExperiment safety valveExperiment shut-off and venting valveBy-pass flow control valveInterlock sensor connectionAll connections are VCR maleDummy load heater (670 W)Performed commissioning tasks last monthPID controllers corrected for pump and heater, (PID was not working at all after TRACI restart)Chiller heater dependent logic changed,Heaters logic thresholds tuned,Sub cooling 102 and 103 added,New warm start up procedure introduced (allows TRACI to start if ambient temperature >20C),DP110 on filter before the pump added for monitoring purpose, Pump high and low speed limits added,Web servers updated,PLC core code corrected wrong OBs (Operation Blocks) has been used in software,Pump controller wiring problem solved,Chiller PTs scaling corrected,Chillers thermostatic expansion valve preliminary regulation is done,Pump ramping speed introduced ( to avoid pump stopping each time we change the speed request)

8After these the performance testing could start

Traci-3 pump commissioningHNP 11558Traci-3 AIDA started commissioning in February.1st find a good operational range of the pump Pump is expensive and may not be destroyed due to stupiditiesMain concern: How to avoid overloadingHigh dP at low flows is bad for the pump due to large self heating = cavitations risk

Traci has 2 flow circuits: Experimental flow and by-pass flowWith a small experiment flow the by-pass must be openA safe way is having the by-pass open at all times. Drawback: higher pump flow may reduce operation at high temperatures.When large experiment flows are present, by-pass can be closed to gain capacity at high temperaturesBest approach, but not advisable to inexperienced users: Close the by-pass the same way as the experimental valve is closed, as if they are gear connected.

The 1st operation of the pump and comparison to the performance curves measured in the pump test stand revealed a wrong control of the pump.Was corrected with the proper jumper settings in the control

Pump limits set:1 bar dPsetpoint: dP controldP@flow setpoint < dPsetpoint: Flow controlControls implemented and working but need still tuning for stability

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dP limitdP limitFlow control

dP controlConclusionsTraci-3 Aida is under commissioning and results look good.Preliminary performance tests carried out this week, more tests will follow.Flow and dP tuningTests above 300 W Max SP temperature vs flowFinding the proper by-pass procedureEtc 14