1. Cryolab flow tests results
Normal and squeezed pipes
Claudio Bortolin, Piotr Gach, Kacper Kapusniak

2. Set point measurements
We made the tests using 4 different flows and 3 different power applied to the stave
Flows (g/s): – 2 – 2.5
Stave Power (W): 30 – 60 – 90
We considered as reliable only the temperature sensors glued closer to the outlet of the stave surface (n. 12, 14 and 16).
Each set point required about 30 minutes after the flow regulation before having a very stable condition
The data considered for the tests are the average values of 10 minutes of data taking.

3. Simplified schema CORA Foam Box Inlet Outlet STAVE TRANSFER LINE
Capillary Inlet Sensors
SQUEEZE
PIPE FT
PT TT
PT TT
TRANSFER LINE
Capillary Outlet
Sensors
Stave Outlet Sensors
Stave T surface Sensors (12,14, 16)
PT TT
STAVE
Power Supply
Inlet
Outlet PT TT
Pressure Transmitter
Temperature Transmitter FT
Flow Transmitter

4. Squeezed Titanium part
Capillary Outlet
Temperature
Capillary Outlet
Pressure
Stave Outlet
Temperature
Capillary Inlet
Temperature
Stave Outlet
Pressure
Capillary Inlet
Pressure
Sensors: 12, 14, 16
Temperature
Squeezed Titanium part

5. Squeezed pipe detail
Pipe squeezed using a micrometer until we reached the distance of 1.4 mm (1.2 mm inside). The length of the squeezed part is about 6 mm.

6. Stave powered with 90 W
N=Normal
SP= Squeezed pipe

7. Stave powered with 60 W

8. Stave powered with 30 W

9. Stave Temperatures

10. Stave Temperatures

11. Stave Temperatures

12. Conclusions The pressure drop with the SP is almost negligible
There aren’t any evidence of modification of the evaporation pressure with the SP
The sensors glued on the surface of the stave showed a difference of degrees with the SP.