Now showing 1 - 2 of 2
  • Publication
    Performance characterisation of thermal energy storage containing a Phase Change Material (PCM) sphere with low conductivity fins: simulation-based analysis
    (Semarak Ilmu Publishing, 2024-11)
    Muhammad Syahir Ahmad Fouzi
    ;
    ;
    Anas Hakimi Anas Hafidz
    ;
    ;
    Nursyazwani Abdul Aziz
    ;
    ;
    Izzuddin Zaman
    ;
    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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  • Publication
    Intake manifold material selection and fluid flow analysis for formula society of automotive engineers (FSAE) race car
    The Formula SAE competition is organised for students who want to design and build a Formula-style race car. To limit the car's performance for safety and to encourage problem-solving skills, a 20mm restrictor was installed between the carburetor and the intake manifold to reduce air intake. When airflow is restricted, a bottleneck effect occurs, and less air is supplied to the engine for combustion, lowering engine efficiency. The goal of this project is to find a solution to this problem within the rules' limitations. This is accomplished by selecting an intake manifold that provides the best uniform distribution through each outlet and selecting a material that can withstand engine stress and vibrations while maintaining a relatively low temperature to ensure consistent velocity and pressure. Computational Fluid Dynamics (CFD) software is used to analyse the design's fluid flow, static, and thermal analysis, and the results are compared for each design. The best design and material will be used on the Universiti Malaysia Perlis Automotive Racing Team (UniART) race car