Development and Investigation of a Miniature Copper-Acetone Loop Heat Pipe with a Flat Evaporator

Maydanik, Yury F.; Pastukhov, Vladimir G.; Chernysheva, M.A.

doi:10.4236/jectc.2015.54006

Cited by 17 publications

(5 citation statements)

References 14 publications

(17 reference statements)

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“…For these tests, the LHP is positioned horizontally. Table 7 shows the different values of hsink for each sink temperature calculated based on the indicated volume flow rate in the study of Maydanik et al, [27] using the Dittus-Boelter correlation [59]. The convective heat transfer coefficient between the LHP and the ambient is hamb = 10 W/m.K and the ambient temperature Tamb = 20°C.…”

Section: Model Validation 61 Validation For the Evaporator And Vapor Temperaturesmentioning

confidence: 99%

“…In the second technology, the liquid flow is directed along the evaporator wall [18][19][20][21][22][23][24][25][26][27][28]. They are referred to as evaporators with Aside Compensation Chamber (AS-CC).…”

Section: Introductionmentioning

confidence: 99%

“…Chernysheva et al, [26] studied the effect of the orientation in the gravity field, the sink temperature, and the ambient temperature on the LHP thermal performance. Maydanik et al, [27] developed a copper acetone LHP with a flat evaporator. The effect of the different orientations in the gravity field and heat sink temperature on the operating characteristics was investigated.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Model Validation 61 Validation For the Evaporator And Vapor Temperaturesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling of Loop Heat Pipe Thermal Performance

Gabsi

Maalej

Zaghdoudi

2021

ARFMTS

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“…Especially when the LHP works in the condition where the evaporator is higher than the condenser and compensation chamber, the gravity pressure difference will cause the increasing circulation resistance. At this point, the loop heat pipe often has problems such as over-temperature start-up, temperature fluctuations, which reduced the heat exchange capacity (Chen et al 2006;Maydanik et al 2015;Vershinin et al 2007;Filippeschi et al 2010;Chernysheva et al 2015). Chernysheva et al (2015) investigated the operating characteristics of a copper-water LHP to determine the effect of external factors such as the device orientation, in the range of heat loads from 20 to 600 W and at slopes from 0 to 60 o (see Fig.…”

Section: Anti-gravity Operation Capability 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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“…It is known that the cooling device is critical to promote high heat flux components' operation reliability, performance improvement and lifespan extension [1,2]. Lots of previous studies have shown that the development speed and scale of large application servers and data centers will largely be affected by the research and development progress of its cooling devices [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of a Vapour-Liquid Separated Flat Loop Heat Pipe Evaporator System

et al. 2020

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In this paper, a unique operation mechanism of loop heat pipe (LHP) was proposed. To test the performance of LHP under this new mechanism, a visual flat LHP evaporator prototype and an open experimental system were designed and assembled, and start-up experiment and variable heat load experiment were done respectively to obtain the actual operation characteristics, such as the evaporator thermal resistance (Re), total thermal resistance (Rt), start-up time and temperature of base plate. The proposed LHP had better overall performance during the start-up tests when He value of EC was set to 0.5mm, and its corresponding Re and Rt value were 0.035 K/W and 0.451 K/W when the heating power was 208w. Meanwhile, as per the heat load applied to the base plate, the whole variable heat load experiment could be divided into three distinct stages: low heat load stage, efficiency operation stage and dry-out stage. Moreover, the results also showed that the circulation driven head formed inside of the EC played an important role in promoting the operation performance, especially when the wick, the vapour-liquid interface and the bottom of the evaporator arrived at a reasonable situation.

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Development and Investigation of a Miniature Copper-Acetone Loop Heat Pipe with a Flat Evaporator

Cited by 17 publications

References 14 publications

Modeling of Loop Heat Pipe Thermal Performance

Modeling of Loop Heat Pipe Thermal Performance

Research and Development of Loop Heat Pipe – A Review

Experimental analysis of a Vapour-Liquid Separated Flat Loop Heat Pipe Evaporator System

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