Two-phase flow pattern based theoretical study of loop heat pipes

Weng, Chih Yuan; Leu, Tzong Shyng

doi:10.1016/j.applthermaleng.2015.11.124

Cited by 22 publications

(6 citation statements)

References 21 publications

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“…Although previous studies on LHP modeling contributed significantly to the understanding of the physical phenomena involved in the operation of such systems, the literature survey evidences a lack in the modeling of the evaporation phenomenon within the capillary wick (Table 4). Indeed, many of the published models did not present details about how the evaporation thermal conductance is determined or modeled [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47]49]. Besides, according to the literature review, to date, no models have been established for the prediction of the evaporation heat transfer coefficient in the capillary structures.…”

Section: Literature Survey On Lhp Models and Critical Reviewmentioning

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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Section: Literature Survey On Lhp Models and Critical Reviewmentioning

confidence: 99%

Modeling of Loop Heat Pipe Thermal Performance

Gabsi

Maalej

Zaghdoudi

2021

ARFMTS

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“…In an experimental work by White et al, different two-phase flow models were compared to their experimental data [4], and the best-suited model was adopted to perform parametric studies and to optimize maximum bubble pump efficiency. Weng and Leu [5] pipes. The proposed LHP model is for condensation tube diameter design ranging from 1 to 5 mm.…”

Section: Introductionmentioning

confidence: 97%

An experimental study on the performance of guided bubble pump with multiple tubes

Lin

Liu

Danqing

et al. 2016

Applied Thermal Engineering

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“…Srimuang et al [14] reviewed the applications of heat pipe heat exchangers for heat recovery.This review article provided additional information for the design of heat pipe heat exchangers with optimum conditions in the heat recovery system. Riahi and Taherian [15] investigated on the performance of thermal thermosyphon solar water heater. They found experimentaly that such system can provide ample energy to satisfy the demand for hot water.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the increasing thermal efficiency of an indirect water bath heater by use of thermosyphon heat pipe

et al. 2020

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Natural gas must be preheated prior to pressure reduction in city gate stations (CGSs). Indirect water bath heaters are employed in CGSs for preheating, consume a considerable amount of natural gas for the process. This type of heater has a low efficiency therefore a significant amount of energy is wasted. Due to the high capacity of thermosyphon heat pipe (THP), its utilization in CGS heater were investigated experimentally in this paper. For this purpose, a heater setup was manufactured and its thermal efficiency was calculated. THPs were then designed, manufactured, and utilized between the fire tube and the gas tube. Further the type of working fluid and the range of filling ratio (FR) were discussed and the most effective state was suggested. Moreover, the thermal efficiency of the heater in the presence of THPs was investigated. The obtained results showed that the thermal efficiency of the heater improved up to 13% with the addition of THPs. The most effective state of THPs was associated with the water as working fluid with 20% FR in the front route and methanol as working fluid with 30% FR in the back route of the fire tube.

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Two-phase flow pattern based theoretical study of loop heat pipes

Cited by 22 publications

References 21 publications

Modeling of Loop Heat Pipe Thermal Performance

Modeling of Loop Heat Pipe Thermal Performance

An experimental study on the performance of guided bubble pump with multiple tubes

Experimental investigation of the increasing thermal efficiency of an indirect water bath heater by use of thermosyphon heat pipe

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