Capillary pressure in graphene oxide nanoporous membranes for enhanced heat transport in Loop Heat Pipes for aeronautics

Buffone, Cosimo; Coulloux, Jerome; Alonso, Beatriz; Schlechtendahl, Mark; Palermo, Vincenzo; Zurutuza, Amaia; Albertin, Thomas; Martin, Simon J.; Molina, Marco; Chikov, Sergey; Muelhaupt, Rolf

doi:10.1016/j.expthermflusci.2016.04.019

Cited by 15 publications

(5 citation statements)

References 35 publications

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“…Cowl anti-icing using LHPs in the global hawk UAV was possible due to the proximity of the cowl to the hydraulic system and the relatively small size of the cowl compared to larger civil aircraft engine intake diameters. New developments in wick materials [126] have shown a drastic increase in achievable pressure differential of the LHP, by up to 3.5-fold, which is estimated to extend the working distance of LHP from current 8-10 m to 28-35 m.…”

Section: Ice Protection Systemmentioning

confidence: 99%

Aircraft thermal management: Practices, technology, system architectures, future challenges, and opportunities

Heerden

Judt

Jafari

et al. 2022

Progress in Aerospace Sciences

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Section: Ice Protection Systemmentioning

confidence: 99%

Aircraft thermal management: Practices, technology, system architectures, future challenges, and opportunities

Heerden

Judt

Jafari

et al. 2022

Progress in Aerospace Sciences

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“…Heat pipe that is a compact and effective heat exchanger includes microchannel heat pipe, mesh wick heat pipe, sintered core heat pipe, oscillating heat pipe and thermosyphon heat pipe, and other heat pipe forms [31]. The researchers conducted experimental studies on different types of nanofluids such as Al 2 O 3 [32,33], CuO [34,35], SiO 2 [36,37], Fe 2 O 3 [38,39], and graphene nanosheets [40][41][42] in heat pipes. The results indicated that nanofluids can enhance heat transfer of the heat pipes.…”

Section: Nanofluid Application In Heat Pipesmentioning

confidence: 99%

Effect of Nanofluids on Boiling Heat Transfer Performance

Yao

Teng

2019

Applied Sciences

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At present, there are many applications of nanofluids whose research results are fruitful. Nanofluids can enhance the critical heat flux, but the effect on boiling heat transfer performance still has disagreement. Base liquids with higher viscosity improve the boiling heat transfer performance of nanofluids. When the base liquid is a multicomponent solution, the relative movement between the different solutions enhances the microscopic movement of the nanoparticles due to the different evaporation order during the boiling process, so that the boiling heat transfer performance is enhanced. Compared with the thermal conductivity of the heated surface, the deposition of the low thermal conductivity nanoparticles reduces the heat dissipation rate of the heated surface and improves the wall superheat. Then the enhancement of the boiling heat transfer coefficient should be attributed to the thermal conductivity improvement of base fluid and the bubble disturbance resulted from the nanoparticle’s microscopic motion.

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“…It was found that the addition of PCFSS reduces thermal resistance. The PCFSS with a porosity of 70% and fill ratio of 30% found to be an optimum condition, which helped the heat pipe to operate between 5 and 200 W. Buffone et al 19 developed a graphene-based wick structure for loop heat pipe applicable for aeronautics, in which graphene oxide particles were coated on the surface of nickel sintered powder wick that is facing towards the vapor and found that the capillary pressure was enhanced 3.5 times higher than that of the nickel sintered powder wick. Choi et al 20 developed a wick structure suitable for loop heat pipes by sintering a thin copper nanoparticles film on the microporous copper substrate by low-temperature sintering.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer characteristics and flow visualization of anodized flat thermosiphon

Varughese

Raj

Sharifpur

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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Use of environmentally safe refrigerants is the need of the hour to minimize the carbon footprints and to reduce the ozone depletion. The application of such environmentally safe refrigerants in the thermosyphon with the micro/nanoporous coating is expected to operate efficiently. In this study, a simple cost-effective anodizing technique to form a uniform thin micro/nanoporous coating at the inner wall of the thermosiphon is undertaken, and the resulting performance enhancement is presented. Also, the effect of fill ratio, heat input and the porous coating on the heat transfer characteristics of flat thermosiphon are studied. The heat transfer coefficient in the evaporator of anodized and nonanodized thermosiphon is enhanced to a maximum of 3587 and 2742 W/m2 K, respectively. The number of pores present in the anodized evaporator surface is estimated as 3.4 × 109. The width (pore size) and depth of pore are measured as 0.25 µm and 16 nm respectively. The porosity of the coating is around 55%, and the contact angle is ≤10°. As a result, the heat transfer coefficient at the evaporator and condenser of anodized thermosyphon is enhanced to a maximum of 24% and 13% respectively, when compared to that of the nonanodized thermosiphon.

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Capillary pressure in graphene oxide nanoporous membranes for enhanced heat transport in Loop Heat Pipes for aeronautics

Cited by 15 publications

References 35 publications

Aircraft thermal management: Practices, technology, system architectures, future challenges, and opportunities

Aircraft thermal management: Practices, technology, system architectures, future challenges, and opportunities

Effect of Nanofluids on Boiling Heat Transfer Performance

Heat transfer characteristics and flow visualization of anodized flat thermosiphon

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