Immersion cooling effect of dielectric liquid and self-rewetting fluid on smooth and porous surface

Chen, Pin; Harmand, Souad; Ouenzerfi, Safouene

doi:10.1016/j.applthermaleng.2020.115862

Cited by 15 publications

(3 citation statements)

References 40 publications

(34 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is worth mentioning that in the above studies, only the convective process is involved (Kushwaha et al, 2021), without considering the phase transition process. It is well known that the study of heat transfer performance in mixed fluids is a focal point, such as water and ethanol (Hu et al, 2018), 2-propanol aqueous mixtures and alcohol (Sakashita et al, 2010), FC-72 and FC-75 (Yokouchi et al, 1987), Novec 7300 and 1-butanol (Chen et al, 2020), HFE-7100 and HFE-7200 (Arik and Bar-Cohen, 2002). In the follow-up studies, it is suggested that the phase change model be considered to explore whether the binary mixture in the porous media will also produce separation phenomenon during the boiling process under mechanical vibration.…”

Section: Binary Mixturementioning

confidence: 99%

Effect of mechanical vibration on heat and mass transfer performance of pool boiling process in porous media: a literature review

Zhao,

Wu,

Dang

2023

Front. Energy Res.

View full text Add to dashboard Cite

Pool boiling in porous media has been applied in various thermal management systems by using latent heat and increasing the heat transfer area and thermal conduction path to improve the heat transfer performance. In mechanical equipment, vibration is an inevitable problem due to reasons such as engine operation and high-speed relative motion between transmission system components, which causes the system components to be affected by vibration forces or vibration accelerations. This study focuses on a review of published articles about the effects of mechanical vibration on the characteristics of boiling process in porous media by two aspects: heat transfer performance and bubble dynamics. Heat transfer coefficient (HTC) and critical heat flux are two main parameters used to measure the boiling heat transfer characteristics of porous media. For bubble dynamics investigations, properties such as migration, fragment, coalescence, departure diameter and frequency are the focus of research attention. Different mechanical vibration parameters, i.e., direction, frequency, and amplitude, will have different effects on the above characteristics. It is worth mentioning that the greatest influence occurs under resonance conditions, and this has been verified through experimental and simulation calculations. This review highlights the importance of considering mechanical vibrations in the design and optimization of porous media systems for efficient heat transfer applications. Further research is warranted to explore the detailed mechanisms and optimize the vibration parameters for enhanced heat transfer performance in thermal management systems using porous media.

show abstract

Section: Binary Mixturementioning

confidence: 99%

Effect of mechanical vibration on heat and mass transfer performance of pool boiling process in porous media: a literature review

Zhao,

Wu,

Dang

2023

Front. Energy Res.

View full text Add to dashboard Cite

show abstract

“…On the other hand, Novec7100 is an engineering fluid primarily employed for the direct cooling of electronic devices as an electrical insulating fluid. It offers the advantage of preventing fires resulting from fluid leakage due to external impacts on the working fluid, owing to its electrical wire insulation properties [17].…”

Section: Introductionmentioning

confidence: 99%

Anti-Gravity 3D Pulsating Heat Pipe for Cooling Electric Vehicle Batteries

Lee,

Kim,

Han

et al. 2024

Energies

View full text Add to dashboard Cite

This study proposes an anti-gravity 3D pulsating heat pipe (PHP) for cooling pouch batteries in electric vehicles. The 3D PHP envelops the battery cells and rapidly transfers heat generated from the batteries to the bottom cold plate. While the batteries generate heat on their frontal surface during charging and discharging, structural characteristics lead to localized heat accumulation at the electrode lead tabs. Therefore, to address frontal heating, Pattern A with a consistent height for the 3D PHP and Pattern B with varying heights to enhance heat transfer in the localized heating area were designed. The target application involved creating a battery simulator for 340 × 100 mm pouch battery cells, considering the battery’s heat generation characteristics. The experiments for the thermal characteristics were conducted, considering factors such as the working fluid (methanol, Novec7100), filling ratio, supplied heat, and orientation. Additionally, to observe internal flow mechanisms, a special experimental apparatus was used, employing transparent fluorine rubber tubes to observe the flow mechanism of the 3D PHP. In the results of the thermal characteristics, the optimal filling ratio was 15% when heat generation levels of 50 W and 100 W were supplied and 20% when 150 W was supplied. The impact of orientation yielded varied results depending on the pattern and working fluid, attributed to the complex interplay of flow momentum due to orientation changes and the influence of the working fluid’s buoyancy under anti-gravity conditions. Pattern B, designed with the goal of applying a localized heat model, exhibited relatively decreased heat transfer performance in areas with varying heights. As the distance from the varying height portion increased, temperature oscillations and heat transfer became more active. These results suggest that variations in the shape of the 3D PHP could be a primary design variable for crafting localized heat models. Observations of internal flow revealed that the 3D PHP, with its unique shape and operation under anti-gravity conditions, exhibits longer and more irregular cycles compared to gravity-assist PHPs, transferring heat through rapid oscillations of internal working fluid liquid/vapor slug/plug. The potential of 3D PHPs for cooling electric vehicle batteries is suggested by these findings, and further experimentation is planned to evaluate the optimal design and applicability.

show abstract

“…Additionally, researchers have introduced a one-section and two-stepwise microchannel for cooling [ 14 ] and a recirculating cooling water system to reduce energy consumption [ 15 ]. Another study considered the cooling effect of dielectric liquid [ 16 ], and yet another reported that a fracture in the neck of the bond between the solder joint and gold wire after 20 thermal shocks would result in metal conductors failing at high temperatures [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Temperature and Optical Power of an LED by Using Microfluidic Circulating System of Graphene Solution

Chung

Lin

2021

Nanomaterials

View full text Add to dashboard Cite

Electric devices have evolved to become smaller, more multifunctional, and increasingly integrated. When the total volume of a device is reduced, insufficient heat dissipation may result in device failure. A microfluidic channel with a graphene solution may replace solid conductors for simultaneously supplying energy and dissipating heat in a light emitting diode (LED). In this study, an automated recycling system using a graphene solution was designed that reduces the necessity of manual operation. The optical power and temperature of an LED using this system was measured for an extended period and compared with the performance of a solid conductor. The temperature difference of the LED bottom using the solid and liquid conductors reached 25 °C. The optical power of the LED using the liquid conductor was higher than that of the solid conductor after 120 min of LED operation. When the flow rate was increased, the temperature difference of the LED bottom between initial and 480 min was lower, and the optical power of the LED was higher. This result was attributable to the higher temperature of the LED with the solid conductor. Moreover, the optical/electric power transfer rate of the liquid conductor was higher than that of the solid conductor after 120 min of LED operation, and the difference increased over time.

show abstract

Immersion cooling effect of dielectric liquid and self-rewetting fluid on smooth and porous surface

Cited by 15 publications

References 40 publications

Effect of mechanical vibration on heat and mass transfer performance of pool boiling process in porous media: a literature review

Effect of mechanical vibration on heat and mass transfer performance of pool boiling process in porous media: a literature review

Anti-Gravity 3D Pulsating Heat Pipe for Cooling Electric Vehicle Batteries

Improvement of Temperature and Optical Power of an LED by Using Microfluidic Circulating System of Graphene Solution

Contact Info

Product

Resources

About