Study of using enhanced heat-transfer flexible phase change material film in thermal management of compact electronic device

2020 ◽  
Vol 210 ◽  
pp. 112680
Author(s):  
Wanwan Li ◽  
Fei Wang ◽  
Wenlong Cheng ◽  
Xi Chen ◽  
Qing Zhao
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Phase Change Material ◽  
Thermal Management ◽  
Electronic Device ◽  
Enhanced Heat Transfer ◽  
Change Material

A Study on Melting Phenomena and Enhanced Heat Transfer of Phase Change Material by Ultrasonic Vibrations

2007 ◽  
Vol 345-346 ◽  
pp. 889-892 ◽  
Author(s):  
Ho Dong Yang ◽  
Yool Kwon Oh
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Phase Change Material ◽  
Fluid Dynamic ◽  
Computational Simulation ◽  
Melting Time ◽  
Liquid Region ◽  
Ultrasonic Vibrations ◽  
Enhanced Heat Transfer ◽  
Change Material

This study focused on observing the melting phenomena and investigated a principle factor of enhanced heat transfer in phase change material when the ultrasonic vibrations were applied during the melting process. For visualization, particle image velocimetry and thermal-vision camera for observing the flow phenomenon was used. Also, experiments were performed to obtain the experimental results such as melting time and temperature distribution. Besides, structural vibration simulator which is applying a coupled finite element-boundary element method (Coupled FE-BEM) was used for calculation of acoustic pressure occurred by ultrasonic vibrations in liquid region. The results of experimental and numerical observations show that acoustic streaming induced by ultrasonic vibrations is one of the prime effects acoustically enhanced phase change heat transfer and help to accelerate the melting of phase change material. Also, the application technique of visualization and computational simulation introduced in this study is very useful and important to analyze the mechanical behavior of material in a fast fluid dynamic or acoustic field.

scholarly journals Thermal management of photovoltaic panel with nano-enhanced phase change material at different inclinations

2021 ◽  
Author(s):  
UNNIKRISHNAN KARTHAMADATHIL SASIDHARAN ◽  
ROHINIKUMAR BANDARU
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Phase Change ◽  
Phase Change Material ◽  
Thermal Management ◽  
Thermal Energy ◽  
Liquid Fraction ◽  
Maximum Enhancement ◽  
Conduction Heat Transfer ◽  
Change Material

Abstract Photovoltaic (PV) panel, coupled with phase change material (PCM), has attracted broad attention for the panel's thermal management. Despite the higher energy storage capability of PCMs, the main disadvantage is their low thermal conductivity which is compensated to an extent with the nano-enhanced PCMs (NEPCMs). In this study, numerical simulations are carried out to compare the natural convection phenomena and thermal response of PV-NEPCM with simple PV-PCM for various tilt angles. CuO nanoparticles with a 4% volume concentration are selected for NEPCM. The thermal performance of PV-NEPCM at inclinations of 0°, 15°, 30°, and 45\(^\circ\) are compared with a simple PV-PCM system. The average temperature of PV, liquid fraction and thermal energy stored in PCM, the PV efficiency are compared for PV-PCM and PV-NEPCM systems. Results show that the loading of nanoparticles increases the conduction heat transfer inside PCM. It has also been shown that at lower inclinations, the use of NEPCM is more effective due to the dominance of conduction heat transfer. At higher tilt angles, natural convection plays a significant role in the heat transfer mechanism inside PCM. By using NEPCM, the maximum decrease in PV temperature of 1.11\(℃\) and maximum improvement in the liquid fraction (7.6%) are achieved when \({\theta }=0^\circ\) compared to simple PCM. Enhancement of thermal energy stored in PCM increases slightly upon adding nanoparticles, and the highest improvement is obtained for \({\theta }=0^\circ .\) Maximum enhancement of PV efficiency is found to be 1.6% for \({\theta }=0^\circ\) inclination on adding nanoparticles at a fraction of 4 vol.%. Keywords: PV, nano-enhanced PCM, nanoparticles, natural convection, liquid fraction.

Anisotropically enhanced heat transfer properties of phase change material reinforced by graphene-wrapped carbon fibers

2020 ◽  
Vol 206 ◽  
pp. 110280 ◽  
Author(s):  
Nan Sheng ◽  
Ruijie Zhu ◽  
Takahiro Nomura ◽  
Zhonghao Rao ◽  
Chunyu Zhu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Phase Change Material ◽  
Carbon Fibers ◽  
Enhanced Heat Transfer ◽  
Change Material ◽  
Transfer Properties

Nanoparticle enhanced paraffin and tailing ceramic composite phase change material for thermal energy storage

2020 ◽  
Vol 4 (9) ◽  
pp. 4547-4557
Author(s):  
Runfeng Li ◽  
Yang Zhou ◽  
Xili Duan
Keyword(s):  
Heat Transfer ◽  
Energy Storage ◽  
Phase Change ◽  
Phase Change Material ◽  
Ceramic Composite ◽  
Physical Stability ◽  
Enhanced Heat Transfer ◽  
Composite Phase Change Material ◽  
Change Material ◽  
Transfer Properties

A nanoparticle-paraffin-tailing ceramic composite phase change material is developed with good chemical and physical stability and enhanced heat transfer properties.

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