Vapor chamber heat sink with hollow fins

Michels, Vanessa; Milanez, Fernando H.; Mantelli, Marcia

doi:10.1590/s1678-58782012000300002

Cited by 13 publications

(3 citation statements)

References 5 publications

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“…Such a design has proved better heat transfer capabilities with higher fin efficiencies in the range of 93% and can reduce the overall surface area as well as the size of the cooling system. With the same principle as mentioned above, Michels et al 125 developed hollow fin VC as depicted in Figure 12. The author used the concept of the isothermal fin in which the entire fin surface is at the same temperature, which leads to the concept of 100% fin efficiency.…”

Section: Hollow Fin Vapour Chambermentioning

confidence: 99%

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Deployment of vapour chambers for electronic heat dissipation: state-of-the-art

Chitnis

Dayal

Arora

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Miniaturization and high performance are the two principal requirements of modern electronics. All commercial applications demand reliable performance at high operational efficiency for prolonged service life. In order to meet all these requirements, the cooling system should be able to handle large heat fluxes packed in compact spaces and take away the heat as soon as possible to avoid overheating of the chip. Phase change heat transfer devices can handle large heat fluxes on account of latent heating. Lately, vapour chambers (VCs) are found to be promising heat spreaders as they are passive two-phase heat transfer devices. They effectively eliminate the hotspots, transferring high heat fluxes with better efficiencies and offer lower thermal resistance compared to the conventional cooling techniques. A detailed review of the latest research and advancements in the field of VCs is presented in this paper, including the effect of different thermo-physical parameters on their performance. Finally, all the major findings are summarized, including the future scope of development in a systematic manner.

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Section: Hollow Fin Vapour Chambermentioning

confidence: 99%

“…With the same principle as mentioned above, Michels et al 125 developed hollow fin VC as depicted in Figure 12. The author used the concept of the isothermal fin in which the entire fin surface is at the same temperature, which leads to the concept of 100% fin efficiency.…”

Section: Latest Advancements In the Development Of The Vapour Chambermentioning

confidence: 99%

Deployment of vapour chambers for electronic heat dissipation: state-of-the-art

Chitnis

Dayal

Arora

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…In this work, the energy integration in the separation of multicomponent mixtures was experimentally studied in a falling film distillation column with heat supply using a vapor chamber (thermosyphon). The heat supply is carried out by a non-condensable gas vapor chamber based on phase change heat transfer, requiring lower thermal gradients and reducing the thermal resistance to heat transfer and thereby allowing the minimization of the requirements of energy in a distillation unit (Michels et al, 2012). Thus, combining the complexity of the experimental study of multicomponent mixtures with the search for energy minimization as well as the intensification of processes, the general objective of this work was to investigate the multicomponent separation of a mixture of synthetic naphtha in a distillation sequence of film columns assisted by a thermosyphon operating at atmospheric pressure.…”

Section: Introductionmentioning

confidence: 99%

Energy and Exergetic Evaluation of the Multicomponent Separation of Petrochemical Naphtha in Falling Film Distillation Columns

Querino

Machado

Marangoni

2019

Braz. J. Chem. Eng.

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Multicomponent separation of synthetic petrochemical naphtha (hexane, cyclohexane, toluene and xylene) was carried out in a falling film distillation sequence with heat supply using a vapor chamber (thermosyphon). Tests were carried out by varying feed flow rate and temperatures of the feed and the vapor chamber in two ways of heat supply: isothermal and with a vapor chamber temperature profile. Regarding the distillation behavior of the multicomponent separation with the proposed falling film column, it was verified that the lower values of the studied variables and the profile temperature mode promoted the best results for hexane recuperation. With an indirect sequence of three columns, hexane mass fraction in the top column increases to the value of 0.82. Higher thermodynamic efficiency was found for two columns of the sequence in comparison with the conventional ones. This behavior is related to smaller energy consumption, showing a total energy reduction of 12% compared to the same separation performed in a conventional unit. Energy and exergetic efficiency values were higher than 95% and 85% in the three columns used. These analyses demonstrated that the falling film separation proposal is an energy efficient arrangement and could be considered for multicomponent separation.

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