Nasrul Amri Mohd Amin
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Preferred name
Nasrul Amri Mohd Amin
Official Name
Nasrul Amri Mohd, Amin
Alternative Name
Mohd Amin, Nasrul Amri
Amin, N. A.M.
Amin, N.
Amin, Nasrul Amri Mohd
Mohd. Amin, Nasrul Amri
Mohd Amin, N. A.
Mohd, N. A.
Main Affiliation
Scopus Author ID
57208572998
Researcher ID
ABD-8383-2020

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  • Publication
    Finite element modelling of thin intermetallic compound layer fractures
    ( 2017)
    Ooi Eang Pang
    ;
    Ruslizam Daud
    ;
    Nasrul Amri Mohd Amin
    ;
    Mohd Afendi Rojan
    ;
    Mohd Shukry Abdul Majid
    A thin intermetallic compound (IMC) of solder ball joint induces strong stress concentration between the pad and solder where a crack propagated near the IMC layer. The fracture mechanism of the IMC layer is complex due to the effect of IMC thickness, crack length, solder thickness and Young’s Modulus. At present, there is still an undefined exact geometrical model correlation for numerical simulations of IMC layer fracture. Thus, this paper aims to determine the accuracy of IMC layer models subjected to crack-to-width length ratio (a/W) in correlation with the ASTM E399-83 Srawley compact specimen model using finite element (FE) analysis. Several FE models with different geometrical configurations have been proposed under 10 MPa tensile loading. In this study, the two dimensional linear elastic displacement extrapolation method (DEM) is formulated to calculate the stress intensity factor (SIF) at the crack tip. The study showed that with an error of 0.58% to 0.59%, a width of 2.1 mm and a height of 1.47 mm can be recommended as the best geometrical model for IMC layer fracture modelling which provides a wider range for a/W from 0.45 to 0.85 instead of from 0.45 to 0.55. This result is significant as it presents a method for determining fracture parameters at thin IMC layers with a combination of singular elements with meshes at different densities which is tailored to the Srawley model.
  • Publication
    Finite element modelling of thin intermetallic compound layer fractures
    ( 2017)
    Ooi Eang Pang
    ;
    Ruslizam Daud
    ;
    Nasrul Amri Mohd Amin
    ;
    Mohd Afendi Rojan
    ;
    Mohd Shukry Abd Majid
    A thin intermetallic compound (IMC) of solder ball joint induces strong stress concentration between the pad and solder where a crack propagated near the IMC layer. The fracture mechanism of the IMC layer is complex due to the effect of IMC thickness, crack length, solder thickness and Young’s Modulus. At present, there is still an undefined exact geometrical model correlation for numerical simulations of IMC layer fracture. Thus, this paper aims to determine the accuracy of IMC layer models subjected to crack-to-width length ratio (a/W) in correlation with the ASTM E399-83 Srawley compact specimen model using finite element (FE) analysis. Several FE models with different geometrical configurations have been proposed under 10 MPa tensile loading. In this study, the two dimensional linear elastic displacement extrapolation method (DEM) is formulated to calculate the stress intensity factor (SIF) at the crack tip. The study showed that with an error of 0.58% to 0.59%, a width of 2.1 mm and a height of 1.47 mm can be recommended as the best geometrical model for IMC layer fracture modelling which provides a wider range for a/W from 0.45 to 0.85 instead of from 0.45 to 0.55. This result is significant as it presents a method for determining fracture parameters at thin IMC layers with a combination of singular elements with meshes at different densities which is tailored to the Srawley model.
  • Publication
    Identification of ARX Model for Thermoelectric Cooling on Glass Windows
    ( 2022-01-01)
    Mohd Saifizi Saidon
    ;
    Nasrul Amri Mohd Amin
    ;
    ‘Aqilah Che Sulaiman
    ;
    Mohd Rizal Manan
    ;
    Siti Marhainis Othman
    ;
    Wan Azani Wan Mustafa
    ;
    Arith F.
    Thermoelectric cooling (TEC) is a solid-state heat pump that uses the Peltier effect to dissipate the heat generated by the electronic packaging system. TECs are widely used in aerospace, military, scientific work and industry due to small size, lack of moving parts, and ease of integration. In this study, a cooling system integrated with TEC is developed in a testing area (lecturer’s office) with the aim to reduce the temperature of the hot glass window area due to solar radiation that passes through it. This cooling system used direct TEC, for keeping the cooling temperature on the window to about 26 °C which is equivalent to an air conditioning setting temperature of 26 °C set during the experiment. This work includes experimental and modelling studies conducted on cooling systems integrated with TEC. The main target of this study is to develop a dynamic model of a cooling system integrated with TEC. The black box modelling approach in producing a mathematical model was selected based on the ARX model that corresponds to the actual dynamic state of the cooling system. The best model was finalized based on the best match on curve patterns when comparing the real and estimated models using the system identification tools in MATLAB, and also had the least error. The accuracy of the models was compared and analysed. The results showed that the 4th order of the ARX model produced a higher best fitting and standard deviation values of 78.14% and 0.030769. This system accuracy is almost within the acceptable range for most error calculations in the validation method. In addition, the ARX model is found incapable of achieving the highest fitting due to the losses from the dynamic environment and losses from the TEC itself. Still, the use of this black box model used in this study is a significant variation where system parameters can be identified even offline.
  • Publication
    Experimental investigation on AC unit integrated with sensible heat storage (SHS)
    ( 2017-10-29)
    Aziz N.A.
    ;
    Nasrul Amri Mohd Amin
    ;
    Mohd Shukry Abdul Majid
    ;
    Hussin A.
    ;
    Zhubir S.
    The growth in population and economy has increases the energy demand and raises the concerns over the sustainable energy source. Towards the sustainable development, energy efficiency in buildings has become a prime objective. In this paper, the integration of thermal energy storage was studied. This paper presents an experimental investigation on the performance of an air conditioning unit integrated with sensible heat storage (SHS) system. The results were compared to the conventional AC systems in the terms of average electricity usage, indoor temperature and the relative humidity inside the experimented room (cabin container). Results show that the integration of water tank as an SHS reduces the electricity usage by 5%, while the integration of well-insulated water tank saves up to 8% of the electricity consumption.
  • Publication
    Efficiency analysis of a passive daylighting system based on Northern Malaysia’s climate
    (Semarak Ilmu Publishing, 2025-04)
    Mohd Sani Mohamad Hashim
    ;
    Muhammad Amin Zulkifli Din
    ;
    Abdul Halim Ismail
    ;
    Mohd Hafif Basha Mohamad Jamel Basha
    ;
    Nasrul Amri Mohd Amin
    ;
    Ng Yi Fei
    ;
    Muhamad Safwan Muhamad Azmi
    ;
    Siti Marhainis Othman
    ;
    Nur Saifullah Kamarrudin
    Daylighting design strategy is important in order to have adequate lighting source in a room and necessary to decrease energy consumption for artificial lighting. Passive daylighting system utilizes daylight by collecting, reflecting and diffusing the natural light throughout a given area. The purpose for this study is to monitor, compare and analyse an optimum light pipe system design that can scatter daylight into a room based on three case studies. Lighting analysis was conducted using Autodesk 3ds Max Design software throughout the project based on the actual geographical parameters of Universiti Malaysia Perlis, Malaysia and also using the real sun azimuth on working hours. The results were compared according to the respective designs in order to observe the maximum internal illuminance and the average internal illuminance. The results show that the straight geometry with low aspect ratio produces the highest interior light intensity among other light pipe systems and the average internal illuminance values in the room was able to reach the minimum requirement of a small room which is 200 – 500 lux.
  • Publication
    Synthesizing and Optimization the Hydroxyapatite Based on Corbiculacea Seashells
    ( 2021-01-01)
    Mohd Riza Mohd Roslan
    ;
    Nashrul Fazli Mohd Nasir
    ;
    Nur Farahiyah Mohammad
    ;
    Cheng Ee Meng
    ;
    Nasrul Amri Mohd Amin
    ;
    Abdul Khalid M.F.
    ;
    Mohd Zakimi Zakaria
    ;
    Muhammad Mokhzaini Azizan
    ;
    Muzammil Jusoh
    Hydroxyapatite (HA) is one of the main components in bone which functions to enhance its cell regeneration. Synthetically produced HA, based on seashell resources has higher biocompatibility, and in high demand especially in bone tissue engineering. However, the secondary phase of HA production are calcium oxide and carbonate, which impedes its performance. HA is synthesized via wet chemical precipitation and optimization were done to obtain nearly pure HA by manipulating the pH value and sintering temperature. It is expected that the combination of these parameters will optimize the amount of secondary phase hence attained nearly stoichiometric or pure HA. HA powders were analyzed through Fourier Transform Infrared Spectroscopy (FTIR) and Energy Dispersive X-ray Spectrometry (EDX).
      1
  • Publication
    Statistical Analysis on The Near-Wake Region of RANS Turbulence Closure Models for Vertical Axis Tidal Turbine
    ( 2023-01-01)
    Rahim M.W.A.
    ;
    Anas Abdul Rahman
    ;
    Abdul-Rahman A.
    ;
    Muhammad Izham Ismail
    ;
    Mohd Shukry Abdul Majid
    ;
    Nasrul Amri Mohd Amin
    The flow field in the near wake region (up to six turbine diameters downstream) of a tidal current turbine is strongly driven by the combined wake of the device support structure and the rotor. Accurate characterisation of the near-wake region is important, but it is dominated by highly turbulent, slow-moving fluid. At present, limited number of researches has been undertaken into the characterisation of the near-wake region for a Vertical Axis Tidal Turbine (VATT) device using the Reynolds Averaged Navier Stokes (RANS) model in the shallow water environment of Malaysia. This paper presents a comprehensive statistical analysis using the Mean Absolute Error (MEA), Mean Squared Error (MSE) and Root Mean Squared Error (RMSE) on the near-wake region for shallow water application by comparing numerical solutions (i.e., different types of RANS turbulence models using Ansys Fluent) with published experimental data. Seven RANS turbulence models with a single VATT, represented by using a cylindrical object, were employed in the preliminary study. The statistical analysis performed in this study is essential in exploring and giving a detailed understanding on the most suitable RANS turbulence model to be improved, specifically on its near-wake region. In this study, the near wake region is defined as D ≤ 6, where D is the device diameter. The analysis shows that the RANS numerical solutions are unable to accurately replicate the near-wake region based on large statistical errors computed. The average RMSE of near-wake region at z/D = [2, 3, 4, 6] are 0.5864, 0.4127, 0.4344 and 0.3577 while the average RMSE at far-wake region z/D = [8, 12] are 0.2269 and 0.1590, where z is the distance from the cylindrical object along the length of domain. The statistical error values are found to decrease with increasing downstream distance from a cylindrical object. Notably, the standard k–ε and realizable k–ε models are the two best turbulent models representing the near-wake region in RANS modelling, yielding the lowest statistical errors (RMSE at z/D = [2, 3, 4, 6] are 0.5666, 0.4020, 0.4113 and 0.3455) among the tested parameters.
      28  2
  • Publication
    Study of intake manifold for Universiti Malaysia Perlis automotive racing team formula student race car
    ( 2017-10-29)
    Norizan A.
    ;
    Md. Tasyrif bin Abdul Rahman
    ;
    Nasrul Amri Mohd Amin
    ;
    Mohd Hafif Basha Mohamad Jamel Basha
    ;
    Ismail M.H.N.
    ;
    Azarul Fahmin Ab Hamid
    This paper describes the design differences between the intake manifold and restrictor used in racing cars that participate in the Formula Student (FSAE) competition. To fulfil the criteria of rules and regulation of the race, each race car must have a restriction device that has a maximum diameter of 20 mm installed between the throttle body and intake manifold. To overcome these problems, a restrictor has been designed and analysed using the steady state analysis, to reduce the loss of pressure in the restrictor. Design of the restrictor has a fixed parameter of the maximum diameter of 20mm. There are some differences that have been taken to make the comparison between the design of the restrictor, the diameter of the inlet and outlet, the curvature of the surface, convergence and divergence angle and length of the restrictor. Intake manifold was designed based on the design of the chassis, which shall not exceed the envelope defined by the FSAE competition. A good intake manifold design will affect the performance of the engine. Each design have made an analysis designed to ensure that each cylinder engine gets its air evenly. To verify the design, steady state analysis was made for a total mass flow rate and the velocity of air leaving a runner in each engine. Data such as the engine MAP reading was recorded by using Haltech ECU Management Software as reference purposes.
      2  32
  • Publication
    Optimising a packed bed phase change material of spheres using effectiveness-number of transfer unit method
    ( 2022-05-01)
    Aziz N.A.
    ;
    Nasrul Amri Mohd Amin
    ;
    Mohd Shukry Abdul Majid
    ;
    Bruno F.
    ;
    Belusko M.
    This paper presents the parametric studies conducted on a packed-bed phase change material (PCM) encapsulated in spheres using the effectiveness-number of transfer units (ɛ-NTU) method for optimisation purposes. In order to maximise the energy storage effectiveness within a packed-bed PCM system, the numerical study on the impact of different parameters was implemented by varying the length (L) and radius (R) of the TES tank, number of spheres (n1) in the tank, and sphere diameter (r3) while maintaining the compactness factor (γ) within the range of 0.3442 ± 0.02 m. The modified charging efficiency (ε*) of the PCM and the modified energy storage effectiveness (α*) of the tested configurations were calculated and compared. As a result, the ‘optimum design’ of the tank yielding the maximum energy storage effectiveness was identified at the optimum length and radius of 1.42 and 0.475 m, respectively, filled with 4098 PCM spheres. The study found that a low L/R value resulted in higher phase-change effectiveness, and the storage effectiveness was maximised at an optimum sphere diameter of 0.03475 m. The investigation led to the conclusion that by concurrently modifying L, R, and n1 during the charging process was advantageous in increasing the heat transfer surface area using small balls, reducing the mass flow rates, and utilising spheres with small diameters.
      22  1
  • 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
    ;
    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.
      1  1