1. Nick Lumb, IPN-Lyon 24 April 2009
Lyon CO2 blow system
Nick Lumb, IPN-Lyon
24 April 2009

5. (Very) preliminary test
Stop CO2 flow
Increase CO2
Flow rate
Adjust ΔP
Do nothing
0.45 → 0.67 g/s
13W
54W
Start CO2 flow
13W
50W

6. Some remarks
Low pressure 23.5 bar according to manometer → should correspond to -15°C
Single temp sensor used → not properly calibrated
Will soon have 7 (carefully calibrated) sensors in fridge + 7 outside
Fridge was at -20°C (range is unfortunately limited between -24 and -17)
I was changing parameters often! System may need more time to stabilize…
Basic message: system is built (no 57 bar!), fine tuning to follow