NikhefAmsterdamMechanical-Technology

Short update on CO2 cooling activities at

Nikhef13 October 2010

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NikhefAmsterdamMechanical-Technology

Green CoolerCO2 Components

◦Accumulator◦Mass flow meter◦Relief valves◦Valve extensions

XFEL CoolerProspect

Contents

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NikhefAmsterdamMechanical-Technology

Green Cooler specificationsCooling capacity: 1.5 kWOperating temperature: -

40°C

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Green Cooler cooling cycle

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Settings:Temperature: -10 °CEnthalpy control: 175 J/g

Enthalpy control heater

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150 200

30

40

H (J/g)

P (

bar

)

-10°C

-20°C

0°C

Experiment

NikhefAmsterdamMechanical-Technology

Green Cooler – VELO replacement

Cooling testsParallel cooling

capillaries

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Components - AccumulatorAccumulator for CMSVolume 27.2 liter and

maximum pressure 110 bar → PED class III

Much delay caused by PED certification

A company that is too excellent (Lloyds)

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Components - Mass flow meter

Mass flow meter RHM015

Resonance between 1750 and 2250 rpm

Mechanical vibrations

Mass flow meter test

New mass flow meter RHM03

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Experiment

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Components – Relief valvesSwagelok relief

valvesParker CE certified

relief valvesEPR 90 seal

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Components - Valve extensions

Designed at Nikhef to extend standard Swagelok ball valves

Operate on a panelBetter insulation

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European XFELX-ray Free Electron Laser detector

development at DesyA cooler with a cooling capacity of

1.2 kW at an operating temperature of -15°C

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XFEL Cooler - Primary cooling

Commercial condensing unit

Operating temperature -25°C

ComponentsHot gas by-pass

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R404 cooling plant

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ProspectsRunning the Green Cooler at -30°CDeliver a certified accumulator at CMSTest mass flow meterTest Parker relief valvesBuilding the XFEL Cooler

For more information: http://www.nikhef.nl/pub/departments/mt/projects/CO2cooling/Projects/ http://www.nikhef.nl/pub/experiments/atlaswiki/index.php/XFELCooler

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