A review on cooling performance enhancement for phase change materials integrated systems—flexible design and smart control with machine learning applications

2020 ◽  
Vol 174 ◽  
pp. 106786 ◽  
Author(s):  
Yuekuan Zhou ◽  
Siqian Zheng ◽  
Guoqiang Zhang
Author(s):  
Ali Deriszadeh ◽  
Filippo de Monte ◽  
Marco Villani

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.


Author(s):  
Himel Das Gupta ◽  
Kun Zhang ◽  
Victor S. Sheng

Deep neural network (DNN) has shown significant improvement in learning and generalizing different machine learning tasks over the years. But it comes with an expense of heavy computational power and memory requirements. We can see that machine learning applications are even running in portable devices like mobiles and embedded systems nowadays, which generally have limited resources regarding computational power and memory and thus can only run small machine learning models. However, smaller networks usually do not perform very well. In this paper, we have implemented a simple ensemble learning based knowledge distillation network to improve the accuracy of such small models. Our experimental results prove that the performance enhancement of smaller models can be achieved through distilling knowledge from a combination of small models rather than using a cumbersome model for the knowledge transfer. Besides, the ensemble knowledge distillation network is simpler, time-efficient, and easy to implement.


2020 ◽  
Vol 10 (3) ◽  
pp. 5814-5818
Author(s):  
M. A. Aichouni ◽  
N. F. Alshammari ◽  
N. Ben Khedher ◽  
M. Aichouni

The intermittent nature of renewable energy sources such as solar and wind necessitates integration with energy-storage units to enable realistic applications. In this study, thermal performance enhancement of the finned Cylindrical Thermal Energy Storage (C-TES) with nano-enhanced Phase Change Material (PCM) integrated with the water heating system under Storage, Charging and Discharging (SCD) conditions were investigated experimentally. The effects of the addition of copper oxide (CuO) and aluminum oxide (Al2O3) nanoparticles in PCM on thermal conductivity, specific heat, and on charging and discharging performance rates were theoretically and experimentally investigated and studied in detail. The experimental apparatus utilized paraffin wax as PCM, which was filled in Finned C-TES to conduct the experiments. The experimental results showed a positive improvement compared with the non-nano additive PCM. The significance and originality of this project lies within the evaluation and identification of preferable metal-oxides with higher potential for improving thermal performance.


2019 ◽  
Vol 25 (S2) ◽  
pp. 156-157 ◽  
Author(s):  
Martin Jacob ◽  
Loubna El Gueddari ◽  
Gabriele Navarro ◽  
Marie-Claire Cyrille ◽  
Pascale Bayle-Guillemaud ◽  
...  

2015 ◽  
Vol 78 ◽  
pp. 1708-1713 ◽  
Author(s):  
Francesco Guarino ◽  
Sonia Longo ◽  
Maurizio Cellura ◽  
Marina Mistretta ◽  
Vincenzo La Rocca

2020 ◽  
Vol 31 ◽  
pp. 101610 ◽  
Author(s):  
A.E. Kabeel ◽  
Wael M. El-Maghlany ◽  
Mohamed Abdelgaied ◽  
Moataz M. Abdel-Aziz

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