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IBL installation and commisioning status 10 April 2014

IBL installation and commisioning status 10 April 2014.

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IBL installation and commisioning status 10 April 2014

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  1. IBL installation and commisioning status10 April 2014 Jan Godlewski, Bart Verlaat, Lukasz Zwalinski, Maciej Ostrega, Claudio Bortolin, Carolina Deluca, Piotr Gach, Michal Zimny, George Clonti, Olivier Crespo Lopez, Martijn van Overbeek, Erno Roeland, Sven Vogt, Markus Lippert, Tomasz Blaszczyk, Sylvain Nichilo

  2. IBL CO2 Cooling system status • Plant status in USA15 • All cooling units operational and running relatively smooth • Most tuning of control loops performed • Stepper procedures verified • Some issues to be solved: • Water cooled chiller operation is not working • Design concept error, needs a modification • Still missing flow switch • Level probes calibration • Needs a complex calibration procedure, on hold due to more urgent matters • Filter dP, • Different filters size installed • Too small stand-by injector valve • New cartridge • Rotarex valve end switches • Very bad feedback from company • Commissioning has started • Both system A and B are operational • Cooling over junction box with dummy load achieved.

  3. Plants @ USA15 L3

  4. Vacuum transfer line status Plant Side Transfer line installed in October ‘13 UX15

  5. Junction installation 3kW dummy load heater Manual valves

  6. Cooling start-up Cooldown In current configuration is 3kW to much for -40’C operation, unable to hold set-point (green line) Pressurization of the system -40’C set-point reached -35’C setpoint 3kW 2kW 1kW

  7. System preparation for start-up Accu cool down Liquid arriving Pressurization of the system by accu heating System is full liquid Warm start under low pressure Pump and chiller start

  8. Nominal IBL condition. -40’C set point with 2kW JB power Dummy load: 2kW Dummy load: 0W Compressor speed Mass flow Junction box temperature = IBL reference Accumulator saturation = Controlled temperature (-40ºC) Sub cooling margin CO2 liquid temperature Chiller temperature

  9. SP=-35’C operation Compressor at full speed, temperature of liquid increases 2000W 1500W 1000W 2500W 500W 0W 0W Junction box temperature Margin of sub cooling must be maintained. >10’C for safe operation Capable of maintaining set point from 0 to 3kW Chiller temperature and CO2 liquid

  10. SP=-40’C operation Compressor at full speed, temperature of liquid increases 2500W 3000W 0W 2000W 1500W Junction box temperature -35’C to -40’C set point change Margin of sub cooling must be maintained. >10’C for safe operation Unable to maintain -40’C setpoint Capable of maintaining set point from 0 to 2kW Chiller temperature and CO2 liquid

  11. Conclusions and Outlook • The IBL cooling is starting to work. • First observations: • -40’C operation is more critical than expected from -30’C experience. • -35’C operation is okay up to 3kW • Pressure drops are more significant than expected • More heat load in liquid pump, meaning a higher needed minimum sub cooling. • Direct effect on the lowest possible temperature. • All above adds up and brings target operational performance to become critical for higher heat loads • Stepper procedures and control works nicely. • Interlocks stops are becoming rare • Start-up is relatively smooth

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