Application of a two-phase thermosyphon loop with minichannels and a minipump in computer cooling

Bieliński, H.; Mikielewicz, Jarosław

doi:10.1515/aoter-2016-0001

Cited by 11 publications

(8 citation statements)

References 14 publications

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“…The main observation was that the enhanced structure surface decreased the oscillations at the entire range of heat fluxes and enhanced the heat transfer coefficient. Bieliński and Mikielewicz [9] developed a onedimensional separated two-phase flow and heat transfer model in a closed thermosyphon loop with minichannels and a minipump. Studies indicated that the presented model is a power tool for increasing the effectiveness of computer cooling.…”

Section: State Of the Artmentioning

confidence: 99%

Selected thermal and flow issues in a reversed thermosiphon with a steam liquid lifter

2018

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The work presents initial studies of a reversed thermosiphon with a steam liquid lifter and a minigap evaporator. The main interest of the authors is the evaporator, especially the heat exchange efficiency and flow issues, such as maldistribution and pressure drop. However, because the thermosiphon circuit of such a construction is characterized by cyclic working conditions, which are quite difficult in analysis the authors focused on this specificity first. The article presents the concept of a test circuit and preliminary results for distilled water and for a minigap evaporator with a smooth heat exchange surface 100 x 200 mm and minigap thickness of 1 mm. Visualizations of the separator's work and the minigap boiling structures are presented.

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Section: State Of the Artmentioning

confidence: 99%

Selected thermal and flow issues in a reversed thermosiphon with a steam liquid lifter

2018

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“…As a result, these systems achieve more reliable operation and, additionally, the investment and operating costs of the installation can be significantly reduced. In addition, the NCLs provide safe, quiet, and maintenance-free operation and are very promising solutions to various applications, for example, in refrigeration engineering, nuclear energy [7,8], electronic devices cooling [9][10][11], solar heaters [12], geothermal processes [13], cryogenic refrigeration systems [14], or even domestic refrigerators [15,16].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Efficiency of Heat Transportation in Indirect Propane Refrigeration System Equipped with Carbon Dioxide Circulation Loop

2022

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Recent research on indirect cooling systems using natural refrigerants has become increasingly common. One such solution is the gravity-induced circulation loop. The paper provides model considerations of the configuration of an indirect propane refrigeration system equipped with a circulation loop using carbon dioxide as a heat transfer fluid. Close attention has been paid to the analytical modelling of the carbon dioxide circulation loop operation. The model was formulated to determine the optimum height of the liquid downcomer based on the determination of flow resistance and heat transfer rate in evaporation and condensation processes. A validation of the proposed analytical model against the available literature on two-phase flow structure predictions and thermal performance predictions was performed. The effect of the change in the refrigeration capacity of the system on the coefficient of performance COP of the entire indirect system was analysed for the first time. The analysis was performed for three different carbon dioxide evaporation temperatures for the system’s refrigeration capacity, ranging from 0.5 to 10 kW. It has been proven that the system efficiency increases by up to 23% with an increase in the refrigeration capacity of the system. An increase in evaporation temperature in the circulation loop from −20 °C to 0 °C improves the COP of the entire indirect refrigeration system by approximately 50%. The above findings indicate that indirect cooling systems using naturally circulated CO2 as a heat transfer fluid should be designed for operation at maximum refrigeration capacity.

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“…The most common types of heat pipes for cooling systems of MED are classical heat pipes [22], loop heat pipes [30,31], and loop thermosyphons [32][33][34][35]. Problem issues with the use of such cooling systems is the effective removal of heat from the condensation zone of a two-phase heat transfer device to the environment.…”

Section: Introductionmentioning

confidence: 99%

Archives of Thermodynamics

Nikolaenko,

Baranyuk,

Rohachov

et al. 2020

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Promising cooling systems for high-power electronic elements are those based on vapor chambers and heat pipes which allow for the local heat flow to be dispersed from the electronic element to a larger surface area of the vapor chamber or the heat pipe. To reduce the thermal resistance of the cooling system, a finned radiator is installed on the outer surface of the vapor chamber or heat pipe. The authors propose a new design of the radiator which increases the heat transfer efficiency. The paper presents results of numerical simulation of heat transfer and aerodynamic resistance of the heat transfer surface with lamellar-split finning. The comparative analysis of heat transfer and aerodynamics was carried out for three types of radiators: with lamellar smooth finning, with lamellar split finning and with the sections of split finning rotated 30 • against the air flow. It is shown that cutting the fins and rotating the split sections leads to an increase in heat transfer intensity and increase in aerodynamic resistance. The obtained results may be useful in the design of cooling systems for computer processors, power amplifiers for transmitting modules, energy-saving solid-state light sources, etc.

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Application of a two-phase thermosyphon loop with minichannels and a minipump in computer cooling

Cited by 11 publications

References 14 publications

Selected thermal and flow issues in a reversed thermosiphon with a steam liquid lifter

Selected thermal and flow issues in a reversed thermosiphon with a steam liquid lifter

Assessment of Efficiency of Heat Transportation in Indirect Propane Refrigeration System Equipped with Carbon Dioxide Circulation Loop

Archives of Thermodynamics

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