its ultra-low-mass cooling system
DESCRIPTION
ITS Ultra-Low-Mass Cooling System. Enrico DA RIVA Manuel GOMEZ MARZOA WG4 Meeting - 10 th April 2013. D16 Prototype: C 4 F 10 thermal test results. Experimental test upgrades. 6 NTCs over prototype. Estimation of the power to room air. New configuration of the C 4 F 10 loop: - PowerPoint PPT PresentationTRANSCRIPT
E. Da Riva/M. Gomez Marzoa 1WG4 Meeting - 10th April 2013
ITS Ultra-Low-Mass Cooling System
Enrico DA RIVA
Manuel GOMEZ MARZOA
WG4 Meeting - 10th April 2013
D16 Prototype:
C4F10 thermal test results
Experimental test upgrades
WG4 Meeting - 10th April 2013 2E. Da Riva/M. Gomez Marzoa
1. 6 NTCs over prototype.
2. Estimation of the power to room air.
3. New configuration of the C4F10 loop:
Full control of the refrigerant thermodynamic properties.
4. Full uncertainty analysis done.
D16 prototype: C4F10 tests
WG4 Meeting - 10th April 2013 3E. Da Riva/M. Gomez Marzoa
1. No-Flow tests:
Power dissipated/absorbed to/from to room air
Agreement T sensors
2. Single-phase flow tests:
Pressure drop
Energy balance
General uncertainty
3. Two-Phase flow tests:
Thermal performance
Two-phase pressure drop
Compare with correlations
D16 prototype summary.
D16: No-Flow tests
WG4 Meeting - 10th April 2013 4E. Da Riva/M. Gomez Marzoa
Procedure:
1. Apply low power and record the average stave temperature.
2. Correlate power dissipated to air vs. average stave temperature.
3. When cooling the stave with full power, the power
dissipated/absorbed to/from air can be estimated.
0 5 10 15 20 250
0.5
1
1.5
2
2.5
3
3.5
f(x) = 0.138622796622739 x − 0.0217761787567377R² = 0.998915601441666
Power to air [W]
Average_T_St - Tamb [˚C]
Pow
er [W
]
D16: C4F10 Single-phase tests
WG4 Meeting - 10th April 2013 5E. Da Riva/M. Gomez Marzoa
Procedure:
1. Apply low power densities (0.1 W cm-2).
2. Ensure subcooled liquid everywhere.
3. Check pressure drop and stave temperature.
800 1000 1200 1400 1600 1800 2000 2200 2400 26000
0.1
0.2
0.3
0.4
0.5
0.6
∆p across the stave
Mass flux [kg m-2 s-1]
Δp st
ave
[bar
]
m [g s-1] G [kg m-2 s-1] Re [-]0.830 1008 41300.831 1009 42061.062 1289 52201.077 1308 53801.422 1726 68561.430 1737 69671.994 2421 94721.975 2398 9441
D16: C4F10 Single-Phase tests
WG4 Meeting - 10th April 2013 6E. Da Riva/M. Gomez Marzoa
800 1000 1200 1400 1600 1800 2000 2200 2400 26000
0.5
1
1.5
2
2.5
3
3.5
4
Relative Stave T vs. Mass Flux
0 W cm^-20.1 W cm^-2
Mass flux [kg m-2 s-1]
TSta
ve-A
vera
ge-T
Flow
-Ave
rage
[K]
Stave picks heat
from room air
D16: C4F10 Two-phase tests
WG4 Meeting - 10th April 2013 7E. Da Riva/M. Gomez Marzoa
200 300 400 500 600 700 800 900 1000 11000
2
4
6
8
10
12
14
Relative Stave T vs. Mass Flux
0.3 W cm^-2 0.5 W cm^-2
Mass flux [kg m-2 s-1]
TSta
ve-A
vera
ge-T
Flow
-Ave
rage
[K]
Comparison: D12-D13-D16
WG4 Meeting - 10th April 2013 8E. Da Riva/M. Gomez Marzoa
K13D2U, 1.45mm ID
K13D2U, 1.45mm ID squeezed
D16: C4F10 Two-phase tests
WG4 Meeting - 10th April 2013 9E. Da Riva/M. Gomez Marzoa
0 1 2 3 4 5 6 70
1
2
3
4
5
6
7
8
9Relative temperature of NTCs. 0.3 W cm-2
271 kg m^-2 s^-1480 kg m^-2 s^-1723 kg m^-2 s^-1979 kg m^-2 s^-1
NTCi [-]
T_N
TCi -
TFl
ow_A
vera
ge [K
]
Error in ΔT: ±1.5 K !!
D16: C4F10 Two-phase tests
WG4 Meeting - 10th April 2013 10E. Da Riva/M. Gomez Marzoa
0 1 2 3 4 5 6 70
2
4
6
8
10
12
14
16Relative temperature of NTCs. 0.5 W cm-2
307 kg m^-2 s^-1394 kg m^-2 s^-1486 kg m^-2 s^-1456 kg m^-2 s^-1719 kg m^-2 s^-1931 kg m^-2 s^-11022 kg m^-2 s^-1
NTCi [-]
T_N
TCi -
TFl
ow_A
vera
ge [K
]
Error in ΔT: ±1.5 K !!
D16: Thermographic pictures
WG4 Meeting - 10th April 2013 11E. Da Riva/M. Gomez Marzoa
C4F10, 0.3 W cm-2 m [g s-1]
ΔpSt
[bar]Av.TC4F10
[°C]xIn [-]
xOut [-]
0.22 0.29 13.9 0.144 0.402
0.40 0.39 16.1 0.067 0.232
0.60 0.53 15.7 0.033 0.164
0.80 0.76 16.8 0.038 0.106
INLET
OUTLET
BEND
D16: Thermographic pictures
WG4 Meeting - 10th April 2013 12E. Da Riva/M. Gomez Marzoa
C4F10, 0.5 W cm-2 m [g s-1]
ΔpSt
[bar]Av.TC4F10
[°C]xIn [-]
xOut [-]
0.25 0.32 16.9 0.048 0.704
0.33 0.37 16.3 -0.005 0.595
0.38 0.30 16.7 0.022 0.485
0.40 0.52 16.7 0.064 0.417
0.59 0.74 16.9 0.043 0.281
0.77 0.86 14.5 0.031 0.219
0.84 0.60 13.8 -0.063 0.289
E. Da Riva/M. Gomez Marzoa 13WG4 Meeting - 10th April 2013
ITS Ultra-Low-Mass Cooling System
Enrico DA RIVA
Manuel GOMEZ MARZOA
WG4 Meeting - 10th April 2013
D16 Prototype:
C4F10 thermal test results
D16: C4F10 Two-phase tests
WG4 Meeting - 10th April 2013 14E. Da Riva/M. Gomez Marzoa
200 300 400 500 600 700 800 900 1000 11000
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Stave two-phase pressure drop
Mass flux [kg m-2 s-1]
ΔpSt
ave
[bar
]