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PrototypeD12D13D14D15 Type High cond. plateHigh cond. plate, squeezed pipesHigh cond. plate Water tests---- C4F10 tests30/11/201210/12/ CommentsSimilar to D06 prototype Test if squeezed pipes will stand working with an overpressure Narrower pipes Similar to D12 and D06, optimized roof assembly High conductivity plate w stave [mm]15.0 h stave [mm]5.0 Stave length [mm]290.0 Plate materialK1100 Thornel Plate thickness [mm] Graphite layer thick. [mm]0.03- C. fleece enc. thick. [mm]0.02 Roof materialM60J Roof fibers diameter [mm]0.3 N fibers at the roof [-]38 Pipe ID [mm] Pipe OD [mm] Pipe pos. in stave w [mm]0.33 GluingHand-made CommentsSi not included Heater Heater width [mm]13 Heater length [mm]270 Overview WG4 Meeting - 12th December 20123M. Gomez Marzoa
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M. Gomez Marzoa 1WG4 Meeting - 12th December 2012
Update on stave thermal testing
Claudio BORTOLIN
Enrico DA RIVA
Corrado GARGIULO
Manuel GOMEZ MARZOA
WG4 Meeting - 12th December 2012
Contents
WG4 Meeting - 12th December 2012 2M. Gomez Marzoa
1. Overview2. Wound-truss prototypes plus carbon plate with embedded pipes: thermal tests
D12: non-squeezed pipes3. Results:
@0.3 W cm-2 & @0.5 W cm-2
D12 (C4F10) vs. D06 (water) D12 vs. D08 (C4F10) Summary plot
4. General conclusion & test plan
Prototype D12 D13 D14 D15Type High cond. plate High cond. plate, squeezed pipes High cond. plate High cond. plateWater tests - - - -C4F10 tests 30/11/2012 10/12/2012 - -Comments Similar to D06 prototype Test if squeezed pipes will stand working
with an overpressure Narrower pipes Similar to D12 and D06, optimized roof assembly
High conductivity plate w stave [mm] 15.0 15.0 15.0 15.0h stave [mm] 5.0 5.0 5.0 5.0Stave length [mm] 290.0 290.0 290.0 290.0Plate material K1100 Thornel K1100 Thornel K1100 Thornel K1100 ThornelPlate thickness [mm] 0.07 0.14 0.07 0.07Graphite layer thick. [mm] 0.03 - 0.03 0.03C. fleece enc. thick. [mm] 0.02 0.02 0.02 0.02Roof material M60J M60J M60J M60JRoof fibers diameter [mm] 0.3 0.3 0.3 0.3N fibers at the roof [-] 38 38 38 38Pipe ID [mm] 1.45 1.45 9.36 1.45Pipe OD [mm] 1.514 1.514 1.00 1.514Pipe pos. in stave w [mm] 0.33 0.33 0.33 0.33Gluing Hand-made Hand-made Hand-made Hand-madeComments Si not included Si not included Si not included Si not includedHeater Heater width [mm] 13 13Heater length [mm] 270 270
Overview
WG4 Meeting - 12th December 2012 3M. Gomez Marzoa
Prototype D12 D13 D14 D15Type High cond. plate High cond. plate, squeezed pipes High cond. plate High cond. plateWater tests - - - -C4F10 tests 30/11/2012 10/12/2012 - -Comments Similar to D06 prototype Test if squeezed pipes will stand working
with an overpressure Narrower pipes Similar to D12 and D06, optimized roof assembly
High conductivity plate w stave [mm] 15.0 15.0 15.0 15.0h stave [mm] 5.0 5.0 5.0 5.0Stave length [mm] 290.0 290.0 290.0 290.0Plate material K1100 Thornel K1100 Thornel K1100 Thornel K1100 ThornelPlate thickness [mm] 0.07 0.14 0.07 0.07Graphite layer thick. [mm] 0.03 - 0.03 0.03C. fleece enc. thick. [mm] 0.02 0.02 0.02 0.02Roof material M60J M60J M60J M60JRoof fibers diameter [mm] 0.3 0.3 0.3 0.3N fibers at the roof [-] 38 38 38 38Pipe ID [mm] 1.45 1.45 9.36 1.45Pipe OD [mm] 1.514 1.514 1.00 1.514Pipe pos. in stave w [mm] 0.33 0.33 0.33 0.33Gluing Hand-made Hand-made Hand-made Hand-madeComments Si not included Si not included Si not included Si not includedHeater Heater width [mm] 13 13Heater length [mm] 270 270
Overview
WG4 Meeting - 12th December 2012 4M. Gomez Marzoa
TESTED
WG4 Meeting - 12th December 2012 5M. Gomez Marzoa
D12 prototype testsStw3
1Stw3
1Stw3
1 Experimental setup.
Flow visualization at stave entrance and outlet
D12 prototype view.C4F10 evaporative test bench: initial setup.
Inlet/outlet180 deg turn
Inflow
Outflow
WG4 Meeting - 12th December 2012 6M. Gomez Marzoa
D12 prototype testsExperimental setup.
C4F10 evaporative test bench: initial setup.
C4F10 evaporative test bench: optimized setup.
The circuit setup was the one used for the Si microchannel tests. Need to re-arrange it for the stave testing.
1. No subcooling tracking2. Lamination before the
coriolis flow meter: wrong reading
3. Flow instability and unknown vapor quality at stave entrance
1. Subcooling estimation Subcooled liquid into
flow meter2. Lamination before the stave3. Thermodynamic state
tracked at stave entrance
1 2 3
WG4 Meeting - 12th December 2012 7M. Gomez Marzoa
D12 prototype testsExperimental setup.
C4F10 evaporative test bench: initial setup.
C4F10 evaporative test bench: optimized setup.
The circuit setup was the one used for the Si microchannel tests. Need to re-arrange it for the stave testing.
1. No subcooling tracking2. Lamination before the
coriolis flow meter: wrong reading
3. Flow instability and unknown vapor quality at stave entrance
1. Subcooling estimation Subcooled liquid into
flow meter2. Lamination before the stave3. Thermodynamic state
tracked at stave entrance
1 2 3
PRELIMINARY RESULTS OBTAINED
ONGOING
D12 C4F10 tests: results @0.3 W cm-2
WG4 Meeting - 12th December 2012 8M. Gomez Marzoa
Heater T map m [g s-1] ΔpSt [bar] TC4F10-In [°C]
TC4F10-Out [°C]
ΔTflow-stave [°C]
0.30 0.33 18.9 15.7 3.2
0.31 0.31 18.8 15.7 3.1
0.43 0.35 19.0 15.5 3.4
0.50 0.34 18.7 15.5 3.3
0.66 0.51 20.3 15.1 5.2
0.82 0.61 20.4 14.9 5.5
WG4 Meeting - 12th December 2012 9M. Gomez Marzoa
Heater T map m [g s-1] ΔpSt [bar] TC4F10-In [°C]
TC4F10-Out [°C]
ΔTflow-stave [°C]
0.33 0.39 19.5 16.4 3.1
0.42 0.42 19.5 15.7 3.8
0.49 0.43 18.7 15.5 3.2
0.66 0.62 21.0 15.1 6.0
0.83 0.73 22.4 14.9 7.5
D12 C4F10 tests: results @0.5 W cm-2
Conclusions for D12: Qualitatively significant results obtained: prototype can keep T < 30 °C (0.3 W cm-2) For 0.5 W cm-2, the maximum temperature is kept around 30 °C. The lack of control over the flow regime and state prevents from quantifying the
response of the prototype under different flow conditions.
WG4 Meeting - 12th December 2012 10M. Gomez Marzoa
D12 m [g s-1] ΔpSt [bar] TC4F10-In [°C]
TC4F10-Out [°C]
ΔTflow-stave [°C]
0.43 0.35 19.0 15.5 3.4
D06 Q [L h-1] Δp [bar] TH20-In [°C]
TH20-Out [°C]
ΔTflow-stave [°C]
3.0 0.23 15.2 17.6 2.4
D12 (C4F10) vs. D06 (water)
D12 m [g s-1] ΔpSt [bar] TC4F10-In [°C]
TC4F10-Out [°C]
ΔTflow-stave [°C]
0.42 0.42 19.5 15.7 3.8
D06 Q [L h-1] Δp [bar] TH20-In [°C]
TH20-Out [°C]
ΔTflow-stave [°C]
3.0 0.24 15.4 19.3 3.9
0.5 W cm-2
0.3 W cm-2
WG4 Meeting - 12th December 2012 11M. Gomez Marzoa
D12 m [g s-1] ΔpSt [bar] TC4F10-In [°C]
TC4F10-Out [°C]
ΔTflow-stave [°C]
0.43 0.35 19.0 15.5 3.4
D08 m [g s-1] ΔpSt [bar] TC4F10-In [°C]
TC4F10-Out [°C]
ΔTflow-stave [°C]
0.40 0.06 13.3 13.4 -0.1
D12 vs. D08 (both C4F10)
D12 m [g s-1] ΔpSt [bar] TC4F10-In [°C]
TC4F10-Out [°C]
ΔTflow-stave [°C]
0.42 0.42 19.5 15.7 3.8
D08 m [g s-1] ΔpSt [bar] TC4F10-In [°C]
TC4F10-Out [°C]
ΔTflow-stave [°C]
0.40 0.17 15.1 13.4 -1.7
0.5 W cm-2
0.3 W cm-2
WG4 Meeting - 12th December 2012 12M. Gomez Marzoa
D06 (water) vs. D08 vs D12 (C4F10)
General conclusion & test plan
WG4 Meeting - 12th December 2012 13M. Gomez Marzoa
Performance of the D12 prototype using evaporative C4F10 was qualitatively assessed and benchmarked against the D06 prototype (with HC plate) and the D08 structure (the wound-truss, no-plate prototype structure performing the best).
However, no identification of the flow regime can be done with the present C4F10 setup. New setup would allow to identify the vapor quality at every point and so estimate flow
regimes, possibility of dryout, etc.
D13, D14, D14 prototypes will be tested: D13: performance of the squeezed pipes concept. D14: influence of a 1 mm pipe ID. D15: same as D06 and D12, allow to assess repeatibility.+ D12 will be tested again under different conditions.
M. Gomez Marzoa 14WG4 Meeting - 12th December 2012
Update on stave thermal testing
Claudio BORTOLIN
Enrico DA RIVA
Corrado GARGIULO
Manuel GOMEZ MARZOA
WG4 Meeting - 12th December 2012
M. Gomez Marzoa 15WG4 Meeting - 12th December 2012
Backup
Overview D12
WG4 Meeting - 12th December 2012 16M. Gomez Marzoa
Maximum ΔT admissible at cooling system
T1
T2
T1+0.5*ΔTStave
If T2 – T1 = 6 K, the maximum ΔT at the stave would be 0.5*(T2-T1) = 3 K In the prototypes tested up to now, ΔT in the water maximum was 3 K A smaller flow rate can be set at the prototype for the configuration above.
Depositions in pipe/erosion considerations
Usually, two characteristic velocities of the fluid are important: Minimum velocity: avoiding depositions inside the piping. Maximum velocity: avoiding failure by erosion throughout piping lifetime.
Contacted manufacturer: limits for erosion not known for polyimide tubes Contacting medical companies and experts
2-phase C4F10 tests @DSF
ALICE Cooling Meeting - 4th September 2012 17M. Gomez Marzoa
p [b
ar]
h [kJ kg-1]
12
4
Qstave [W]
𝑥=𝑚𝑉𝑎𝑝𝑜𝑟
𝑚𝐿𝑖𝑞=
h2−h𝐿𝑖𝑞𝑆𝑎𝑡 |𝑝 2
h𝑉𝑎𝑝𝑆𝑎𝑡 |𝑝 2
−h𝐿𝑖𝑞𝑆𝑎𝑡 |𝑝2
Δ𝑇 h𝑆𝑢𝑝𝑒𝑟 𝑒𝑎𝑡𝑖𝑛𝑔=𝑇 4−𝑇 3′
Inlet vapor quality:
Superheating at stave outlet:
x = const
T = const
Mass flow rate calculation:
�̇�=�̇� 𝐿 Δ𝑥2− 3 ;̇𝑚= �̇�𝐿 Δ𝑥2−3
Usually:
𝐿=h𝑉𝑎𝑝𝑆𝑎𝑡 −h𝐿𝑖𝑞
𝑆𝑎𝑡where L is latent heat [kJ kg-1]:
0.2<𝑥𝐸𝑣𝑎𝑝𝐼𝑛 <0.3
𝑥𝐷𝑟𝑦𝑜𝑢𝑡❑ 0.8÷0.9
Δ𝑥𝐸𝑣𝑎𝑝❑ <0.5
3
5
Prototype summary
WG4 Meeting - 12th December 2012 18M. Gomez Marzoa
Wound truss structures: Wound-truss structures, with no high conductivity plate. D10:
CF is 0.1 mm thick, instead of 0.07 mm (D08). Stave width: 15 mm.
D11: similar to D08. CF 0.07 mm thick. Stave width: 15 mm. Added thick glue layer (avoid hotspots).
Wound truss structures plus a high conductivity plate: D06:
CF is 0.07 mm thick. Stave width: 15 mm. Pipe ID: 1.45 mm
D12: similar to D06. Peek connectors
Geometry of half a wound-truss prototype.
Front view of the high conductivity plate prototypes.
D12 prototype: real geometry.
