1 WG4 Meeting 6th March 2013 ITS UltraLowMass Cooling System Enrico DA RIVA Manuel GOMEZ MARZOA WG4 Meeting 6 th March 2013 Pipe constructive considerations Platesqueezed pipe water test results ID: 816653
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Slide1
E. Da Riva/M. Gomez Marzoa
1
WG4 Meeting - 6th March 2013
ITS Ultra-Low-Mass Cooling System
Enrico DA RIVAManuel GOMEZ MARZOAWG4 Meeting - 6th March 2013
Pipe constructive considerations
Plate/squeezed pipe: water test results
Slide2Updates on piping
Received sample tubes from MicroLumen (~1mm ID)
WG4 Meeting - 6th March 20132
E. Da Riva/M. Gomez Marzoa
Single tubes
No.
Substrate
Outside
Reinforcement
Comments
1
Polyimide
Polyimide
SS Coil (100 WPI)Kinks easily2PolyimidePolyimideSS Braid (100 PIC)Suitable for bending, but quite rigid3Polyimide55D Blue Pebax®SS Braid (75 PIC)Very small bending radius4PolyimidePolyimideNoShaped
Sample tube no. 3, bent: kinking begins.
Slide3Updates on piping
Received sample tubes from MicroLumen (~1mm ID)
WG4 Meeting - 6th March 20133
E. Da Riva/M. Gomez Marzoa
Assemblies: for brainstorming
No.
Substrate
Outside
Reinforcement
Comments
5
Polyimide
55D Natural
Pebax®Coil-reinforced PTFE/Pebax (70 WPI)Transition made with Pebax® at OD (reflowed with straight tubes)6PolyimidePolyimideSame transition as 5Includes shaped polyimide sector.Sample tube no. 6.Straight PI tubeShaped PI tubeReinforced transition
Slide4Updates on piping
Main issue: pipe section affected when bending it?Test: water flow and pressure drop check.
In a straight sample.Same sample bent.
Straighten sample again.Sample no. 3: best candidate.Problem: connections
WG4 Meeting - 6th March 20134E. Da Riva/M. Gomez Marzoa
Compare 1 vs. 3
Cross-check with empirical correlations
No.
Substrate
Outside
Reinforcement
Comments
3
Polyimide55D Blue Pebax®SS Braid (75 PIC)Very small bending radius
Slide5Pipe diameter considerations
WG4 6th February 2013: minimum ID estimation.BUT only considered prototype (
Lpipe=0.58m=2x0.29m).Piping coming from outside detector area:
L>3mPractical solutions:Connection out with bigger pipe: AVOIDTransition to bigger pipe: Leak-tight?
Possible only at pipe extremityConnecting small/big tube: adhesive.Continuous tube, same ID as stave: PossiblePressure drop to be checked.WG4 Meeting - 6th March 20135E. Da Riva/M. Gomez Marzoa
Slide6ITS assembly constraints
WG4 Meeting - 6th March 2013
6E. Da Riva/M. Gomez Marzoa
800mm
200mm
2100 mm
Piping coming from
outside
sensitive area: L > 3m
IN
OUT
ITS Inner Barrel
Slide7Continuous piping: water
WG4 Meeting - 6th March 2013
7E. Da Riva/M. Gomez Marzoa
v [m s-1]
Lpipe [m]
OD/ID [mm]
Δ
p [bar]
(x/X
0
)
Stave
%
% water-pipe of (x/X0)Stave0.581.00/0.931.680.16418.30.581.51/1.450.690.21931.10.582.00/1.930.390.29040.70.582.50/2.430.250.38448.0Pressure drop analysis:LPipe=2*LOut_ITS+2*Lstave = 2*3.5+2*0.29=7.58m~8m
Slide8Accessible area
Continuous piping: C
4F10Cooling system can be divided into three sections:
WG4 Meeting - 6th March 20138
E. Da Riva/M. Gomez Marzoa
Stave
In-detector area
L
1
=3.5m
L
2
=0.6m
L3=3.5mp [bar]h [kJ kg-1]ABDQstave [W]x = constT = constC123
A
B
C
D
The small diameter pipe could be used as capillary.
Work with bigger pipe?
Slide9C4F10
vs. R236faWG4 Meeting - 6th March 2013
9
E. Da Riva/M. Gomez Marzoafluid
C4F10
r236fa
T
15.000
15.000
°C
p
1.920
1.922
barρL1533.6161392.752kg m-3ρG20.85513.136kg m-3cpL1062.5811240.483J kg-1 K-1cpG825.533854.634J kg-1 K-1kL0.046
0.077
W m-1 K-1
kG
0.013
0.012
W m-1 K-1
PrL
5.702
5.247
-
PrG
0.764
0.750
-
hL
17892.024
218378.764
J kg-1
hG
108931.647
369985.205
J kg-1
Slide10Experimental facility
WG4 Meeting - 6th March 2013
10E. Da Riva/M. Gomez Marzoa
Tested prototype with squeezed pipes in water
Slide11Pressure drop analysis
WG4 Meeting - 6th March 2013
11E. Da Riva/M. Gomez Marzoa
Laminar flow rate:
pressure drop linear with water flow rate.Leak-less: pipe section expected not to have changed.
Slide12Thermographic pictures
WG4 Meeting - 6th March 2013
12E. Da Riva/M. Gomez Marzoa
Water, 0.3 W cm
-2Q [L h
-1]
Δ
p
St
[bar]
T
H20
[
°C]ΔTH20 [K]3.00.1421.91.606.00.2722.50.739.00.54314.00.71Data post-processing: still to be finishedInclude the information of the NTCs.Quantify the heat pickup from the environment.
Slide13E. Da Riva/M. Gomez Marzoa
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WG4 Meeting - 6th March 2013
ITS Ultra-Low-Mass Cooling System
Enrico DA RIVAManuel GOMEZ MARZOAWG4 Meeting - 6th March 2013
Pipe constructive considerations
Plate/squeezed pipe: water test results