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LHC CMS Detector Upgrade Project FPIX Cooling Update Stefan Grünendahl, Fermilab For the FPIX Mechanical Group, 29 January 2015 Stefan Grünendahl, 2015-1-29 CO2 Meeting 1
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LHC CMSDetectorUpgrade
Project
CO2 Meeting 1
FPIX Cooling Update
Stefan Grünendahl, Fermilab
For the FPIX Mechanical Group, 29 January 2015
Stefan Grünendahl, 2015-1-29
LHC CMSDetectorUpgrade
Project
CO2 Meeting 2
Done with the overall FPIX cooling loop dimensioning and layout and with the details of the FPIX module (disk) cooling design, incl. testing.
Now working on the details of the loop routing in the electronics area of the cylinder and on the electronics cooling mounts.
Have a first iteration of a design for the DC/DC converter cooling bridge and CO2 tubing clamp (incl. FEA) (shown during Nov.5 summary; included for reference).
We tested the effect of splitting the electronics heat load between input and return lines: allows simplification of tubing layout.
Stefan Grünendahl, 2015-1-29
FPIX Cooling Status
LHC CMSDetectorUpgrade
Project
CO2 Meeting 3Stefan Grünendahl, 2015-1-29
Study of Return Line Heat Load
Added heater connection to return section of FPIX full loop test system
Compared 60W load on input line to 34W (input section) + 27W (return section)
No difference in main loop temperature
P4P
3
P2
P1
T14
T1
Return section: 2.6mm ID, between T13/P2 and T14/P1
LHC CMSDetectorUpgrade
Project
CO2 Meeting 4
Tested at -20ºC, 2.5 bar pressure drop, 2 g/s flow
Stefan Grünendahl, 2015-1-29
Return Line Heat Load: Results I
LHC CMSDetectorUpgrade
Project
CO2 Meeting 5
Pressure sensors: no significant difference in total pressure drop No significant pressure drop over return line (2.6mm ID)
Stefan Grünendahl, 2015-1-29
Return Line Heat Load: Results II
LHC CMSDetectorUpgrade
Project
CO2 Meeting 6Stefan Grünendahl, 2015-1-29
FPIX DC/DC converter mechanical & thermal interface design
Dark blue = aluminum cooling bridge under DC/DC converters, and top of tubing clamp
(could be PEEK)
(as shown in Nov.5 summary)
LHC CMSDetectorUpgrade
Project
CO2 Meeting 7
FEA results indicate single ended cooling yields acceptable converter temperature (left graph) and tubing wall power density (two-sided example shown in right graph, max. density=21 kW/m^2).
Stefan Grünendahl, 2015-1-29
FPIX DC/DC Cooling FEA
(as shown in Nov.5 summary)
