A next-generation ground array for the detection of ultrahigh-energy cosmic r...
fpdaleo_PhD_v3.2_short_mod
1. ||LABORATORY OF NUCLEAR ENERGY SYSTEMS
LABOR FÜR
KERNENERGIESYSTEME
10.12.2016FRANCESCO PAOLO D‘ALEO 1
Surface Sensors for Temperature and Liquid Thickness
Measurement
2. ||LABORATORY OF NUCLEAR ENERGY SYSTEMS
Road map
10.12.2016Francesco Paolo D‘Aleo 2
RTD Array on Glass
RTD Array on Aluminium
Miniaturized Liquid
Film Sensors
Thermal Fatigue
Outline
3. ||LABORATORY OF NUCLEAR ENERGY SYSTEMS
Structure and Dimensions (mm)
10.12.2016Francesco Paolo D‘Aleo 3
53.5
91
RTD “on Aluminium substrate”
4
20
Array
2.5
0.3
0.3
Pt element
Side view
SU-8
4. ||LABORATORY OF NUCLEAR ENERGY SYSTEMS
Experimental Conditions
10.12.2016Francesco Paolo D‘Aleo 4
A A
Xi
i ui
[m/s]
Xi
[mm]
ΔT
[°C]
1 0.2 70 20
2 0.4 150 20
3 0.6 250 20
4 0.8 350 20
5 1 450 20
GEMIX
x
y
u1 (40 °C)
u2 (20 °C)
=
Honeycombs
Splitter-plate
Grids
Thermocouples
RTD Array
5. ||LABORATORY OF NUCLEAR ENERGY SYSTEMS
Results
10.12.2016Francesco Paolo D‘Aleo 5
GEMIX
F. P. D’Aleo, R. Stalder, H.-M Prasser.
Resistive temperature detector arrays on an aluminium substrate;
measurements in mixing experiments. 2014
ui
6. ||LABORATORY OF NUCLEAR ENERGY SYSTEMS
Working Principle
10.12.2016Francesco Paolo D‘Aleo 6
Cross
section
Miniaturized Liquid Film Sensors
A
Cross Talk
Saturation
I[-]
7. ||LABORATORY OF NUCLEAR ENERGY SYSTEMS
Technology and Dimensions
10.12.2016Francesco Paolo D‘Aleo 7
Miniaturized Liquid Film Sensors
100150
20 electrodes
18 measuring points
8. ||LABORATORY OF NUCLEAR ENERGY SYSTEMS
Calibration curves
10.12.2016Francesco Paolo D‘Aleo 8
F. P. D’Aleo, P. Papadopoulos, H.-M. Prasser.
Miniaturized liquid film sensor (MLFS) for two phase flow measurements in
square microchannels with high spatial resolution. 2013
Miniaturized Liquid Film Sensors
160 µm 400 µm
MLFSA
MLFSB
660 µm
660 µm
5.2 µm resolution
9. ||LABORATORY OF NUCLEAR ENERGY SYSTEMS
Results
10.12.2016Francesco Paolo D‘Aleo 9
F. P. D’Aleo, P. Papadopoulos, H.-M Prasser.
Miniaturized liquid film sensor (MLFS) for two phase flow measurements in
square microchannels with high spatial resolution. JFMI (2013).
Miniaturized Liquid Film Sensors
u= 0.76 m/s
u= 0.19 m/s
Editor's Notes
The MLS is composed by a group of electrodes alternating between the so called Transmitters and receivers, here we analyze as an example a transmitter and receiver pair. The Transmitter electrodes is activated with a certain voltage and if a wetting and conducting layer covers also the receiver electrode, the amount of current that flows is proportional to the layer thickness.
