Azizul Mohamad
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Preferred name
Azizul Mohamad
Official Name
Azizul, Mohamad
Alternative Name
Mohamad, Azizul Bin
Mohamad, A.
Mohamad, Azizul
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Scopus Author ID
55655159500
Researcher ID
J-7650-2013

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Performance characterisation of thermal energy storage containing a Phase Change Material (PCM) sphere with low conductivity fins: simulation-based analysis

2024-11 , Muhammad Syahir Ahmad Fouzi , Nasrul Amri Mohd Amin , Anas Hakimi Anas Hafidz , Azizul Mohamad , Nursyazwani Abdul Aziz , Muhammad Sofwan Mohamad , Izzuddin Zaman , Mohd Shukry Abdul Majid

This paper presents the outcomes of a simulation study aimed at investigating the thermal performance of modified phase change material (PCM) structures within a sphere with integrated fins. The escalating global warming crisis and its associated weather anomalies necessitate urgent measures to mitigate its impacts. Numerous research endeavours have been undertaken to address this issue, including the utilization of thermal energy storage systems (TES) augmented with PCM. PCM can be incorporated into building walls to counteract rising temperatures. However, inadequate heat transfer caused by poor thermal conductivity has been a persistent challenge in these systems. The addition of high conductivity fins has found to improve the overall performance of TES. Yet, this study proposes the addition of low conductivity fins to study for the effect of shape factor to its performance. The research evaluates the phase change of 2-fins and 4-fins with varying thicknesses within the PCM structure. A comprehensive simulation framework is employed to analyse the thermal behaviour of the PCM-enhanced sphere without considering ambient temperature nor PCM properties, but fin dimensions and configurations. The simulation results reveal that the inclusion of fins significantly improves heat transfer within the system by cutting a minimum of 20% in phase change time and could promote the phase change process to happen earlier by a maximum of 38% in starting time. By optimizing the fin configuration and thickness, the overall thermal conductivity of the PCM-based TES can be enhanced. These findings contribute to the development of efficient thermal energy storage systems, offering potential solutions to combat global warming and promote sustainable thermal management.

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CFD Simulation on an Improvised Ice Cream Container

2023 , Mohd Tasyrif Abdul Rahman , Nursyazwani Abdul Aziz , Nasrul Amri Mohd Amin , Mohd Ijmal Kamil Patriot , Mohd Sofwan Mohd Resali , Azizul Mohamad , Muhammad Izham Ismail , Mohd Asrul Md Saad

A temperature-sensitive product such as ice-cream may cause the industry to face several challenges throughout the production, storage, packaging, and distribution processes. With the purpose to improve the performance of an ice cream container that acts as cold storage during the delivery process, the integration of a tube-type phase change material (PCM) thermal storage system was studied. In this work, a Computational Fluid Dynamic (CFD) method was used to model and analysed eight designs of phase change thermal storage systems incorporated within the ice-cream container. The tube type PCM was modeled, with and without the conducting pins, aiming to maximise the heat exchange within the system. To obtain a proper design, parametric studies on the number of pins and its diameter were further analysed. For all simulations, the initial time for freezing simulation was set to 2℃, assuming the PCM was fully in a liquid state with the ice mass fraction was set to 0. With that, the PCM average temperature and the total mass fraction was observed and analysed. From the results, the ice mass fraction percentage of the systems was observed to increase with the increasing number of pins. Model with (the maximum) 40 pins has improved ice mass fraction for at least 67.58% when compared to the configuration without pin. Also, the average temperature of PCM for model with maximum pins, was observed to be 37.14% lower when compared to the configuration without pins and less pin numbers. Nevertheless, although the presence of pins has proven to enhance the heat exchange within the system, the percentage of ice formation was considered to be low and the average temperature was still as high as 0.66℃ after 12 hrs of freezing process. This indicating that a proper design of TES is inevitably needed, in order to maximise both heat exchanges and PCM storage ability within the system. © 2023, Semarak Ilmu Publishing. All rights reserved.

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