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Status of the NIKHEF CO 2 cooling test facility IBL Stave Working Group Meeting

Status of the NIKHEF CO 2 cooling test facility IBL Stave Working Group Meeting. Bart Verlaat / Auke-Pieter Colijn 27 October 2009. Nikhef CO 2 cooling laboratory. Insulated test box. Vacuum isolation test. CO 2 2PACL with PLC. Insulation storage. PC’s with PVSS. Electronics rack.

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Status of the NIKHEF CO 2 cooling test facility IBL Stave Working Group Meeting

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  1. Status of the NIKHEF CO2 cooling test facilityIBL Stave Working Group Meeting Bart Verlaat / Auke-Pieter Colijn 27 October 2009

  2. Nikhef CO2 cooling laboratory Insulated test box Vacuum isolation test CO2 2PACL with PLC Insulation storage PC’s with PVSS Electronics rack Julabo cryostat

  3. CO2 2PACL Lab Cooler 2PACL with PLC Test box with experiment • Supplies: • Massflow • Enthalpy • Pressure • Supplies: • Cold Cryostat • Supplies: • Power • Supplies: • Temperature • Pressure • Voltage • Demand for: • Mass flow • Enthalpy • Pressure Power supply • Demand for: • Temperature • Demand for: • Power • Supplies data: • HTC • Pressure drop • CHF • Dry out PC with PVSS to control the cooler and experiment

  4. Nikhef CO2 cooling test facility2PACL lab cooler and test box Siemens PLC Room temperature bottle as accumulator Room temperature evaporation in test tube Cold water condenser (8ºC) 2PACL CO2 circulator is operational for room temperature CO2 cooling. Will be upgrade to a cold cooler the coming months 2PACL lab cooler prototype at NIKHEF

  5. Temporary solution: warm cooling But ideal for commissioning pumps and test protocols! B C Nikhef central 8°C cooling water A D E F Room temperature bottle = room temperature evaporation

  6. Current research activities • Gear pumps for CO2. • IBL cooling tubes • Stainless steel with capillary for dimensioning • Carbon tube • Any other tube…. • Automatic measurement protocols for efficient testing. • (Once your tube can be tested with a 1 push button, scanning you sample and make a report……)

  7. Gear pumps in series(To boost pressure head) Due to large internal leak (low CO2 viscosity), the gear pumps could be operated in series. Gather 1M-J/12-11/X-SS/S/Qk200/DLC/ gear pumps were investigated.

  8. Performance data Gather Gear pumps with CO2

  9. Carbon tube test 4mm carbon tube is mounted in the NIKHEF test stand All thermocouples have been connected to a new patch panel Intermediate cables are installed to lengthen the wires and to switch to the male connectors. (Next prototype should have male connectors and longer wires (~2m) Warm cooling tests will be performed next week using the automatic PVSS scan of varying flow and power.

  10. Cold cooler status • Cold cooler is under construction. All drawings are in the workshop • CO2 bottle will be replaced by LHCbVelo Accumulator • Water condenser will be replaced by LHCbVelo condenser • Both accumulator and HX will be cooled by the Julabo Cryostat • Capacity of cryostat = capacity of CO2 2PACL (minus some tbd losses) • Cryostat is commissioned and works. • Currently filled with glycol (-30°C minimum), but will be filled with Alcohol later (some safety issues still to handle)

  11. Cold 2PACL design Test box connections PLC and electronics Pre-heater Cryostat connection LHCb Accumulator LHCb / SWEP Condenser Existing pump unit

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