Capillary fluid loop developments in Astrium

Figus, C.; Ounougha, L.; Bonzom, P.; Supper, W.; Puillet, Christian

doi:10.1016/s1359-4311(03)00038-3

Cited by 22 publications

(5 citation statements)

References 2 publications

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“…it gives the heat flux taken from the cooled unit about 60 kW/m 2 . In comparison, Astrium's flat CPL [4] can carry away power in the range 0.5÷100 W from surface of 0.9·10 -3 m 2 , i.e. the heat flux range 0.55÷110 kW/m 2 .…”

Section: Discussionmentioning

confidence: 99%

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Capillary pumped loop for cooling of electronic devices

Wajman¹,

Więcek²,

Ostrowski³

et al. 2004

Proceedings of the 2004 International Conference on Quantitative InfraRed Thermography

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Capillary pumps are passive, two-phase heat transport systems that use the capillary pressure in a porous material in an evaporator to force circulation of cooling medium flow. The Capillary Pumped Loop (CPL) has been designed, built and investigated. Pump is destined for cooling of electronic component, which work with maximum temperature about 100°C. Contact surface is 50x50mm. Investigating the static parameters of the pump is the purpose of this paper. The results indicate that a pump takes off 100-200W from the electronic device at 100°C near the surface of the power source.

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Section: Discussionmentioning

confidence: 99%

“…Nowadays, fluid cooling systems, above all those making use of phase transitions of the cooling medium, find new areas of application. Among the efficient solutions of this type, capillary cooling systems (heat pipes [2], loop heat pipes and capillary pumped loops [3,4]) may be distinguished.…”

Section: Introductionmentioning

confidence: 99%

Capillary pumped loop for cooling of electronic devices

Wajman¹,

Więcek²,

Ostrowski³

et al. 2004

Proceedings of the 2004 International Conference on Quantitative InfraRed Thermography

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“…These devices can circulate fluids by using capillary force developed in a micro porous media named wick which is attached in an evaporator [5]. The LHP has been studied and developed especially in the space field [6][7][8]. However, recently, the use of the LHP to terrestrial application is expected and studied [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Thermofluid Characteristics in Microporous Structure With Different Flow Channels for Loop Heat Pipe

Nagano

Kuroi

Nishikawara

2016

Heat Transfer Engineering

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The use of two-phase heat transfer devices using capillary action in a microscale porous structure such as a loop heat pipe (LHP) is a promising heat transport technology. It is because they have characteristics of higher heat transfer power and longer heat transport distances with no electrical power compared with conventional heat pipes. The thermal performance of an LHP is governed by the thermo-fluid behavior in a microscale porous structure called the wick. In this research, high-performance wicks made of polymer has been developed, and its pore distribution and permeability were evaluated. The effects of the vapor channel's shape on the loop's thermal performance have been investigated by calculation and experiment to enhance evaporator performance. A mathematical model of the evaporator considering super heat in the channel, pressure drop across the wick, and two-phase pressure loss on the boundary face between the wick and the evaporator case was newly developed. The experiment was also conducted as a function of the groove shapes. From calculation and test results, it was found that in order to increase the maximum heat transport capability and decrease the operating temperature, the groove should be well distributed.

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“…As mentioned in the previous paragraph, to argue the effectiveness of a low thermal conductivity wick, it is necessary to evaluate the evaporator heat-transfer coefficient. Kobayashi et al [7] and Figus et al [8] investigated the evaporator heat-transfer coefficient, but considered only the effects of heat flux or heat load dependence on the evaporator heat-transfer coefficient. Little attention has been paid to the effects of the clearance between the wick and the casing, the fluid properties, or the working fluid inventory on the evaporator heat-transfer coefficient of the LHP with a wick of low thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Parametric experiments on a miniature loop heat pipe with PTFE wicks

Nishikawara

Nagano

2014

International Journal of Thermal Sciences

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A miniature loop heat pipe (LHP) with polytetrafluoroethylene (PTFE) wicks was fabricated and its evaporator thermal performance was investigated with parametric experiments. The variables considered were the clearance between the cylindrical evaporator casing and the wick, the working fluid inventory, the properties of the working fluids, and the sink temperature. Micro-gaps between the outer surface of the wick and inner surface of the evaporator casing were included in the experiments with variables of clearance to investigate their effect on the evaporator heat-transfer coefficient. Ethanol, acetone, and R134a were charged in the LHP to evaluate the effect of the properties of the working fluids. The LHP tests were conducted with several W/cm 2 of applied heat flux to the evaporator under controlled sink temperature. The clearance seriously affected the evaporator heat-transfer coefficient, with a gap of 20 μm between the wick and casing having the best effect on the evaporator heat transfer across a range of tested heat fluxes. The effects of the working fluid inventory and fluid properties on the evaporator heat transfer were also clarified.Finally, the developed LHP was tested using ethanol as a working fluid under a stepwise heat load and sink temperature.

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Capillary fluid loop developments in Astrium

Cited by 22 publications

References 2 publications

Capillary pumped loop for cooling of electronic devices

Capillary pumped loop for cooling of electronic devices

Thermofluid Characteristics in Microporous Structure With Different Flow Channels for Loop Heat Pipe

Parametric experiments on a miniature loop heat pipe with PTFE wicks

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