scholarly journals Comparative Effectiveness of Different Phase Change Materials to Improve Cooling Performance of Heat Sinks for Electronic Devices

2016 ◽  
Vol 6 (9) ◽  
pp. 226 ◽  
Author(s):  
Ahmad Hasan ◽  
Hassan Hejase ◽  
Shaimaa Abdelbaqi ◽  
Ali Assi ◽  
Mohammed Hamdan
Keyword(s):  
Phase Change ◽  
Comparative Effectiveness ◽  
Phase Change Materials ◽  
Electronic Devices ◽  
Heat Sinks ◽  
Cooling Performance

A comparison of the performance of constant and dual height pin fins in phase change material cooling technique

2020 ◽  
pp. 1-30
Author(s):  
Maibam Romio Singh ◽  
Asis Giri
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Power Level ◽  
Electronic Devices ◽  
Heat Fluxes ◽  
Heat Sinks ◽  
Pin Fins ◽  
Favorable Temperature ◽  
Change Material ◽  
Operational Time

Abstract This experimental study explores the passive cooling of electronic devices using phase change materials (PCM). Pin fins configurations made of aluminium are considered as thermal conductive enhancers and eicosane as the PCM for the study. The experiments are carried out for five different heat fluxes ranging from 1.17 kW/m2 to 2.35 kW/m2 corresponding to a power level of 4 W to 8 W. The effect of number of fins, type of fins and volumes of PCM has been reviewed. It has been observed that the introduction of fins enhances the heat transfer and more elongation in operational time is achieved in case of dual height heat sinks. Also, volume of PCM, number of fins and heat fluxes directly affect in maintaining the device within a favorable temperature range. All the experiments are performed in a temperature controlled room to avoid environment fluctuation.

Effect of Adding Graphene Nano-Platelets With Surfactants on Bio-Based PCM Characteristics and its Cooling Performance

2020 ◽  
Author(s):  
Yahya Sheikh ◽  
Mohamed Gadalla ◽  
Muhammed Umair ◽  
Elmehaisi Mehaisi ◽  
Ahmed Azmeer
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Phase Change ◽  
Heat Sink ◽  
Phase Change Materials ◽  
Heat Sinks ◽  
Reference Temperature ◽  
Electric Heater ◽  
Cooling Systems ◽  
Cooling Performance

Abstract Phase change materials (PCM) are materials that absorb/release large amounts of thermal energy at constant temperatures during phase change. Consequently, PCMs could be effective when electronic cooling systems such as heat sinks and heat pipes are considered. In the selection of PCMs for cooling systems, bio-based PCMs are more effective when compared to inorganic PCM. However, bio-based PCMs have poor thermal conductivity and therefore suffer from poor heat transfer characteristics. The diffusion of certain additives within the PCM has proven successful in the enhancement of heat transfer during the cooling process. Graphene Nanoplatelets (GNPs) presents itself as one such additive. Using PureTemp PCM as a heat sink for an electric heater, this paper experimentally investigates the cooling performance of the heat sink when GnPs and various surfactants such as, SDS, SDBS and SSL, are added to the bio-based PCM. Finally, results indicate that the addition of GnPs increased the time taken for the heater to reach a reference temperature of 43 °C by nearly 12% when compared to PurePCM heat sink, indicating an improved cooling performance of the PCM heat sink when GnP’s were added. Furthermore, the experiment indicated that SSL surfactant showed a 9% increase in time taken to reach the reference temperature when compared to other surfactants. SDS surfactant indicated the highest increase in thermal conductivity when compared to other surfactants as it reported the highest increase of 147% when compared with the thermal conductivity of PurePCM.

Numerical Thermal Performance Investigation of an Electric Motor Passive Cooling System Employing Phase Change Materials

2021 ◽  
Author(s):  
Ali Deriszadeh ◽  
Filippo de Monte ◽  
Marco Villani
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Electric Motor ◽  
Phase Change Materials ◽  
Cooling System ◽  
Passive Cooling ◽  
Time Step ◽  
Cooling Performance ◽  
Passive Cooling System ◽  
Change Material

Abstract This study investigates the cooling performance of a passive cooling system for electric motor cooling applications. The metal-based phase change materials are used for cooling the motor and preventing its temperature rise. As compared to oil-based phase change materials, these materials have a higher melting point and thermal conductivity. The flow field and transient heat conduction are simulated using the finite volume method. The accuracy of numerical values obtained from the simulation of the phase change materials is validated. The sensitivity of the numerical results to the number of computational elements and time step value is assessed. The main goal of adopting the phase change material based passive cooling system is to maintain the operational motor temperature in the allowed range for applications with high and repetitive peak power demands such as electric vehicles by using phase change materials in cooling channels twisted around the motor. Moreover, this study investigates the effect of the phase change material container arrangement on the cooling performance of the under study cooling system.

scholarly journals Computational Study of Heat Transfer inside Different PCMs Enhanced by Al2O3 Nanoparticles in a Copper Heat Sink at High Heat Loads

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 284 ◽  
Author(s):  
Nadezhda S. Bondareva ◽  
Nikita S. Gibanov ◽  
Mikhail A. Sheremet
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Computational Study ◽  
Conjugate Problem ◽  
High Heat ◽  
Solid Particles ◽  
Heat Sinks ◽  
Al2o3 Nanoparticles ◽  
Electronic Elements ◽  
The Impact

The cooling of electronic elements is one of the most important problems in the development of architecture in electronic technology. One promising developing cooling method is heat sinks based on the phase change materials (PCMs) enhanced by nano-sized solid particles. In this paper, the influence of the PCM’s physical properties and the concentration of nanoparticles on heat and mass transfer inside a closed radiator with fins, in the presence of a source of constant volumetric heat generation, is analyzed. The conjugate problem of nano-enhanced phase change materials (NePCMs) melting is considered, taking into account natural convection in the melt under the impact of the external convective cooling. A two-dimensional problem is formulated in the non-primitive variables, such as stream function and vorticity. A single-phase nano-liquid model is employed to describe the transport within NePCMs.

scholarly journals Phase Change Materials Applications to Optimize Cooling Performance of Buildings in the Mediterranean Area: A Parametric Analysis

2015 ◽  
Vol 78 ◽  
pp. 1708-1713 ◽  
Author(s):  
Francesco Guarino ◽  
Sonia Longo ◽  
Maurizio Cellura ◽  
Marina Mistretta ◽  
Vincenzo La Rocca
Keyword(s):  
Phase Change ◽  
Parametric Analysis ◽  
Phase Change Materials ◽  
Mediterranean Area ◽  
Cooling Performance ◽  
The Mediterranean
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