Heat pipes for space & ground applications: Marco Marengo’s … · Current Funding • EPSRC...
Transcript of Heat pipes for space & ground applications: Marco Marengo’s … · Current Funding • EPSRC...
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School of Computing, Engineering and Mathematics
34th HEXAG meeting – Newcastle University – 20th June 2017
Heat pipes for space & ground applications:
Marco Marengo’s research group
at the University of Brighton
Dr Nicolas Miché
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Established research in thermal systems for space and ground applications, recently transposed into the UK
• Joined the University of Brighton in 2014, from Bergamo University (Italy)
• 15 Years experience in design, experiments and modelling of thermal systems
• Particular interest and expertise in Pulsating Heat Pipes
• Experimental and Modelling activities
• 3 Academic staff, 2 Research Fellows, 2 PhD
students at Brighton
• Very close collaboration links with
universities of Bergamo, Milan, Pisa and
Poitiers
• Modelling strengths: DNS/VOF/Lumped
Parameters modelling of two-phase flow
• Experimental strengths: 10 years of thermo-
fluid experiments in micro-gravity in
collaboration with ESA
Prof. Marco Marengo
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Current Funding
• EPSRC Novel Hybrid Heat Pipe for Space and
Ground Applications (HyHP) with Kayser
Space UK, Libertine and Sustainable Engine
Systems
• 2 Innovate UK projects
• 2 ESA Micro-gravity Applications Projects
(MAP):
-Innovative Wickless Heat Pipe Systems for Ground and Space Applications (INWIP)-Enhanced Condensers in Micro-gravity (ENCOM)
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SINTERED HEAT PIPETHERMOSYPHON PULSATING HEAT PIPE
CHEAP
DOES NOT WORK
WITHOUT GRAVITY
POSSIBILITY TO WORK
WITHOUT GRAVITY
EXPENSIVE (wick
structure)
Basic comparison of Heat Pipes for space and ground applications
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TRL 9TRL 9 TRL 4
POSSIBILITY TO WORK
WITHOUT GRAVITY
HIGH POWER (up to
10kW)
MEDIUM 3DPACKAGING
MEDIUM POWER
LOW 3D PACKAGING
HIGH POWER (up to 5kW)
HIGH 3D PACKAGING
CHEAP (capillary pipe)
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THERMALLY DRIVEN HEAT TRANSFER DEVICE
• Capillary tube evacuated and then filled with aworking fluid.
• Alternation of VAPOUR PLUGS and
•LIQUID SLUGS.
• A zone where heat enters the device:EVAPORATOR.
• A zone where heat goes out the device:CONDENSER.
• An optional adiabatic zone between theevaporator and the condenser.
LOW TEMPERATURE HEAT SINK
HIGH TEMPERATURE HEAT SOURCE
vl
critg
DgD
Bo
2
2
Pulsating Heat Pipe basic working principles
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Static Criterion
, 2cr bo
l v
dg
Dynamic Criterion
(Dynamic Criterion 0-g, Baldassari et al. 2013)
,
160 lCr Ga
l l l v
dU g
𝑔 ,cr bod,Cr Gad
EFFECT of GRAVITY
Capillary limit (Kew and Cornwell 1997)
Pipe I.D. → 𝑄
CAPILLARY LIMIT:
Up to a point…
Theoretical Design performance of a PHP
However…
Therefore PHPs are potentially very well suited for high power space
heat transfer application… but the governing physics are complex
and need further research/modelling…
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1g 1.5-1.8 g 0 g 1.5-1.8 g
1 g: Stratified flow1.8 g: Stratified flow0 g: Slug/plug flow activation1.8 g: Stratified flow
PHP experiments in micro-gravity
(Courtesy Novespace)
(Mangini 2017)7
3mm internal diameter – FC72
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Modular Thermo-Fluid test rig for micro-gravity experiments: The Brighton Rack
• Modular - Unique facility in UK
• Built to Novespace and ESA specifications
• Flight qualified during ESA’s 66th parabolic
flight campaign. Scheduled for 67th and 68th.
• 60 kg payload (800 x 600 x 800 mm)
• 300W cooling capacity liquid loop (-5 to 60ºC)
• 300W heating liquid loop
• Class 4 laser ready
• Control PCs and data logger
• Various power supplies and ancillaries
• Optical diagnostics
• Mass and heat transfer
• Thermal imaging
To be presented at the 15th UK Heat Transfer Conference – September 2017
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34th HEXAG meeting – Newcastle University – 20th June 2017
Heat pipes for space & ground
applications:
Marco Marengo’s research group
at the University of Brighton
Dr Nicolas Miché
9
Thank you for your attention