Operational characteristics of a loop heat pipe with a flat evaporator and two primary biporous wicks

Wang, Dongdong; Liu, Zhichun; He, Shiquan; Yang, Jinguo; Liu, Wei

doi:10.1016/j.ijheatmasstransfer.2015.05.042

Cited by 56 publications

(6 citation statements)

References 27 publications

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“…It should be noted that the use of bi-porous capillary-porous structures, application of which in the development of modern highly efficient heat pipes and so-called vapor chambers (VCs) is just beginning, is also very promising [153][154][155][156][157][158][159][160][161][162][163][164]. Such structures, created with simultaneous use of powders of two particle kinds, very different in size (or sometimes shape), have both small pores (about several microns) and large pores (about tens of microns).…”

Section: Heat Transfer Enhancement and Increase In Critical Heat Flux In Horizontal Layers Of Liquid Of Finite Heightmentioning

confidence: 99%

Development of Methods for Heat Transfer Enhancement During Nitrogen Boiling to Ensure Stabilization of HTS Devices

Павленко

Кузнецов

2021

J. Engin. Thermophys.

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The paper presents a brief analysis of current achievements and key issues in the field of heat transfer and critical heat flux enhancement during boiling of cryogenic liquids and freons under various heat release laws via micro-structuring of the heat-generating surface. A review of new experimental data on the efficiency of heat transfer and critical heat flux enhancement during pool boiling via new micro-structured capillary-porous coatings created by plasma sputtering and selective laser melting/sintering (3D printing) is presented. The results of analysis of the efficiency of heat transfer and critical heat flux during boiling on heat-generating surfaces with micro-textures of different shapes and micro-profiling created by micro-deforming cutting are presented. New results obtained during nitrogen boiling under various hydrodynamical conditions on the mechanisms of sharp increase in the rate of non-stationary cooling of plates with new structured capillary-porous or low-heat-conductivity coatings with certain parameters are discussed. New results on the degree of heat transfer enhancement during boiling of liquids on micro-structured surfaces modified by the method of micro-arc oxidation are presented.

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Section: Heat Transfer Enhancement and Increase In Critical Heat Flux In Horizontal Layers Of Liquid Of Finite Heightmentioning

confidence: 99%

Development of Methods for Heat Transfer Enhancement During Nitrogen Boiling to Ensure Stabilization of HTS Devices

Павленко

Кузнецов

2021

J. Engin. Thermophys.

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“…At the same time, after installing the cooling fins for the compensation chamber, the temperature of the compensation chamber can also be reduced to suppress the occurrence of the fluctuation, which provides a reference for the method of suppressing the fluctuation of the heat pipe during low power operation. Wang et al (2014) and Wang et al (2015) also found the relationship between start-up mode and power, and designed a doublesided heated evaporator to reduce the start-up fluctuation at low heat load, which can start successfully at 10W. Pastukhov et al (2003) studied the effect of the initial vapor-liquid distribution in the evaporator /compensation chamber on the start-up characteristics of LHP.…”

Section: Start-up Performance Of Lhpmentioning

confidence: 99%

Research and Development of Loop Heat Pipe – A Review

Ji¹,

Guo²,

Xu³

2020

Frontiers in Heat and Mass Transfer

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With fast development of electronic devices, novel strategies of thermal management have been received great attention to dissipate high heat fluxes. As an efficient heat transfer device, loop heat pipe (LHP) provides ideal solution for such purpose. Even though LHP was invented nearly half-century ago, challenges still exist on its design, fabrication and operation. The objective of this paper is to present a thorough review on LHPs, paying more attention on the working principle, advantage and configuration. The review is performed in three aspects. First, the macroscopic operation characteristics such as start-up, temperature fluctuations and anti-gravity operation are described. Second, effects of various parameters or factors such as porous wick material, pore size and micro-structure on LHPs are reviewed. Third, new concept LHPs using biporous wick and wettability modification are discussed. Finally, perspective of LHPs is presented, which guides future research and development activities, from both fundamental and application point of view.

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“…In the first technology, the compensation chamber is located on the side opposite to the surface being heated so that the liquid flow in the capillary wick is directed towards the heated area. They are referred to as evaporators with Opposite Side to the Compensation Chamber (OS-CC) [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Singh et al, [3] investigated a copper-water LHP with a flat disk evaporator used for thermal control of computer microprocessors.…”

Section: Introductionmentioning

confidence: 99%

“…Joung et al, [12] developed an LHP with a flat evaporator using a specially devised vapor-liquid separator and investigated its transient response. Wang et al, [13] reported on the LHP that utilizes two primary biporous wicks to reduce the impact of the leak on the compensation chamber. Xu et al, [14] investigated the heat performance of a flat copper water LHP with three fill charge inventories.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Loop Heat Pipe Thermal Performance

Gabsi

Maalej

Zaghdoudi

2021

ARFMTS

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The present work deals with the heat transfer performance of a copper-water loop heat pipe (LHP) with a flat oval evaporator in steady-state operation. Modeling the heat transfer in the evaporator was particularly studied, and the evaporation heat transfer coefficient was determined from a dimensionless correlation developed based on experimental data from the literature. The model was based on steady-state energy balance equations for each LHP component. The model results were compared to the experimental ones for various heat loads, cooling temperatures, and elevations, and a good agreement was obtained. Finally, a parametric study was conducted to show the effects of different key parameters, such as the axial conductive heat leaks between the evaporator and the compensation chamber cases, the capillary structure porosity and material, and the groove dimensions.

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Operational characteristics of a loop heat pipe with a flat evaporator and two primary biporous wicks

Cited by 56 publications

References 27 publications

Development of Methods for Heat Transfer Enhancement During Nitrogen Boiling to Ensure Stabilization of HTS Devices

Development of Methods for Heat Transfer Enhancement During Nitrogen Boiling to Ensure Stabilization of HTS Devices

Research and Development of Loop Heat Pipe – A Review

Modeling of Loop Heat Pipe Thermal Performance

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