Experimental investigation of a dual compensation chamber loop heat pipe

Lin, Guiping; Li, Nan; Bai, Lizhan; Wen, Dongsheng

doi:10.1016/j.ijheatmasstransfer.2010.03.003

Cited by 45 publications

(15 citation statements)

References 12 publications

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“…Their high pumping capability and superior heat transport performance have been traditionally utilized to address the thermal-management problems of spacecraft, and were successfully applied in many space tasks [3][4][5][6][7]. More recently, its application has been extended to terrestrial surroundings such as in electronics cooling [8][9][10] and thermal-management systems for aircraft and submarines [11][12][13][14]. Their long distance heat transport capability and flexibility in design could offer many advantages compared with traditional heat pipes and other heat transfer devices.…”

Section: Introductionmentioning

confidence: 99%

Steady-state modeling and analysis of a loop heat pipe under gravity-assisted operation

Bai

Guo

Lin

et al. 2015

Applied Thermal Engineering

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Abstract:In this paper, a steady-state mathematical model of a loop heat pipe (LHP) in gravity-assisted operation has been established based on two driving modes: gravity driven mode and capillarity-gravity co-driven mode. The modeling results show good agreement with experimental data, and the operating characteristics of the LHP under gravity-assisted attitude has been theoretically investigated. When the heat load applied to the evaporator is smaller than the transition heat load, the LHP is operating in the gravity driven mode, the working fluid in the vapor line is in the two-phase state due to the existence of additional liquid mass flow, and the operating temperature is obviously lower than that under horizontal or adverse elevation attitudes caused by reduced heat leak from the evaporator to the compensation chamber and enhanced cooling of the return liquid to the compensation chamber. In addition, the effect of positive elevation on the steady-state operating temperature and thermal conductance of the LHP is analyzed. This study contributes to the comprehensive understanding of the operating principle and characteristics and can guide the design of LHPs in terrestrial surroundings.

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Section: Introductionmentioning

confidence: 99%

Steady-state modeling and analysis of a loop heat pipe under gravity-assisted operation

Bai

Guo

Lin

et al. 2015

Applied Thermal Engineering

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“…Lin et al [71] and Bai et al [72] illustrated that DCCLHP can start and operate normally for a start-up heat load higher than 50 W regardless of the relative orientations. Visualisation work of DCCLHPs is virtually non-existent with the exception of the work done by Lin et al [73]. They observed bubble generation, reverse flow, fluctuating flow and liquid re-distribution, caused by the radial heat leakage from the evaporator.…”

Section: Loop Heat Pipe (Lhp)mentioning

confidence: 99%

Heat utilisation technologies: A critical review of heat pipes

Chan

Siqueiros

Ling‐Chin

et al. 2015

Renewable and Sustainable Energy Reviews

133

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“…Such a division is supported by our previous observations that bubble generation in some part of the inner surface of the evaporator wick was a common phenomenon. , For instance, Fig.7 shows the continuous bubble generation from the evaporator core and movement in the CC [34] for a LHP with dual CCs. Generally, the bubbles generated in the evaporator core will finally move into the vapor region in the CC due to the effects of the buoyancy fore and the entrainment of the fluid flow, and some bubbles may condense in this process due to the cooling effect of the returning liquid.…”

Section: Theoretical Analysismentioning

confidence: 99%

Effect of evaporator tilt on the operating temperature of a loop heat pipe without a secondary wick

Bai

Lin

Zhang

et al. 2014

International Journal of Heat and Mass Transfer

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Abstract:The effect of evaporator tilt on the operating temperature of a loop heat pipe (LHP) without a secondary wick under terrestrial surroundings was investigated both experimentally and theoretically in this work. The experiments were conducted with the evaporator placed at three different tilts: (i) the evaporator was horizontal with the compensation chamber (CC), (iii) the evaporator was vertically below the CC, and (iii) the evaporator was higher the CC with a tilt angle of xx. The experimental results show that the evaporator tilt has significant effect on the operating temperature of the LHP: the operating temperature of the case iii) was much higher than the other two cases.A mathematical model including a two-zoned evaporator wick, i.e. a subcooled zone and a saturated zone, was built and solved, which agreed well with the experimental observation. . The results showed that the cooling effect of the returning liquid on the vapor region in the CC or evaporator core is crucial in determining the operating temperature of LHPs..

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Experimental investigation of a dual compensation chamber loop heat pipe

Cited by 45 publications

References 12 publications

Steady-state modeling and analysis of a loop heat pipe under gravity-assisted operation

Steady-state modeling and analysis of a loop heat pipe under gravity-assisted operation

Heat utilisation technologies: A critical review of heat pipes

Effect of evaporator tilt on the operating temperature of a loop heat pipe without a secondary wick

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