Computational Study of Phase Change Heat Transfer and Latent Heat Energy Storage for Thermal Management of Electronic Components Using Neural Networks

Abstract

The phase change heat transfer of nano-enhanced phase change materials (NePCMs) was addressed in a heatsink filled with copper metal foam fins. The NePCM was made of 1-Tetradecanol graphite nanoplatelets. The heatsink was an annulus contained where its outer surface was subject to a convective cooling of an external flow while its inner surface was exposed to a constant heat flux. The governing equations, including the momentum and heat transfer with phase change, were explained in a partial differential equation form and integrated using the finite element method. An artificial neural network was employed to map the relationship between the anisotropic angle and nanoparticles fractions with the melting volume fraction. The computational model data were used to successfully train the ANN. The trained ANN showed an R-value close to unity, indicating the high prediction accuracy of the neural network. Then, ANN was used to produce maps of melting fractions as a function of design parameters. The impact of the geometrical placement of metal foam fins and concentrations of the nanoparticles on the surface heat transfer was addressed. It was found that spreading the fins (large angles between the fins) could improve the cooling performance of the heatsink without increasing its weight. Moreover, the nanoparticles could reduce the thermal energy storage capacity of the heatsink since they do not contribute to heat transfer. In addition, since the nanoparticles generally increase the surface heat transfer, they could be beneficial only with 1.0% wt in the middle stages of the melting heat transfer.

Decision support system based on a hybrid genetic algorithm–Kohonen map for combined mode conduction–radiation heat transfer in a porous medium: A comparative assessment of three variations of the Kohonen map

“…Combining the benefits of GA and Kohonen map‐based networks for forecasting of the regime of operation of PCM‐based burners for design and development of burners is a novel idea, and comparative assessment of such Kohonen map‐based networks is not available in the open literature, as can be seen in Table 1. Different ANN models are available in the literature to study thermal problems such as PCMs 37–39 . The major advantage of the present ANN approach is its ability to solve such problems without requiring significant knowledge of ANN.…”

“…to study thermal problems such as PCMs. [37][38][39] The major advantage of the present ANN approach is its ability to solve such problems without requiring significant knowledge of ANN. GA helps the user to obtain the details of the optimum architecture of ANN.…”

Nanoencapsulated phase change material in a trapezoidal prism wall under the magnetic field effect for energy storage purposes

“…PCMs have been integrated with a variety of technical applications, most notably for thermal energy storage TES. PCMs have been used in a variety of applications, including building thermal management 1 – 3 , solar collectors 4 , thermal energy storage 5 – 8 and other applications such as space equipment 9 , 10 , electronic cooling 11 , and the packaging industry 12 . Despite the fact that PCMs may store and release a large amount of energy when they change phases, they have a low thermal conductivity.…”