Zuradzman Mohamad Razlan
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Preferred name
Zuradzman Mohamad Razlan
Official Name
Zuradzman, Mohamad Razlan
Alternative Name
Razlan, Zuradzman Mohamad
Zuradzman, M. R.
Razlan, Zuradzman M.
Main Affiliation
Scopus Author ID
55178487200
Researcher ID
AAU-4508-2020

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Temperature Distribution Analysis of Lithium-Ion Polymer Battery Surface

2022-01-01 , Murali Rishan , Zuradzman Mohamad Razlan , Shahriman Abu Bakar , Suffer K.H. , Ibrahim Z. , Wan Khairunizam Wan Ahmad , Mohd Rudzuan Mohd Nor , Muhammad Faisal Hamidi @ Abdul Rani

The main objective of this study is to investigate the heat load generated by the Lithium-ion (Li-ion) battery during the completion of the cycle. Besides that, the objective is also to identify the most affected surface of the Li-ion battery towards the temperature during the charging and discharging process. An experiment is carried out for five different conditions of battery to obtain the data for heat load calculation purposes. The five conditions are differences in discharge ampere. From the result obtained there are differences in heat load generated by the battery during the charging and discharging process for every condition. Furthermore, the greater the discharge ampere, the lower the time taken for the battery to discharge and the higher the heat load generated by the battery. Besides that, an experiment to investigate the temperature distribution along the experiment is also carried out. Four surfaces of battery (front, right, left, back in vertical position of battery) are put into concern in obtaining the temperature distribution. Every surface gives a different temperature distribution during the experiment. Surface 4 recorded the highest average temperature distribution. Thus, the cooling system will consider the cooling capacity at this surface.

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Approach to enhance the heat transfer of valve seats through thermal analysis

2022-02-05 , Hassan M.A.S.M. , Zuradzman Mohamad Razlan , Shahriman Abu Bakar , Mohd Afendi Rojan , Wan Khairunizam Wan Ahmad , Ibrahim Z. , Ishak A.A. , Rahman A.A. , Mohd Ridzuan Mohd Jamir

The valve seat insert is a component of the engine cylinder head, whose primary function is to seal the combustion chamber and absorb the valve's heat, releasing it to the engine cylinder head. The valves experience high temperatures owing to high thermal loading and low heat absorption in the valve seat, which can potentially damage the engine. Therefore, the thermal characteristics of the valve seat must be optimised to increase the heat transmission between the valve and its seat. Here, three copper alloy valve seats, brass, beryllium copper, and bronze copper, were tested against the existing sintered iron valve seat, and their temperature maps were determined using actual engine operation conditions. The instantaneous heat transfer coefficients of the valves, seats, and engine cylinder head during the four-stroke cycle were evaluated using a one-dimensional thermal simulation analysis. The values obtained were used to assess the finite-element model using a three-dimensional thermal simulation in the Ansys software. The results show that the brass, beryllium-, and bronze-copper valve seats increased the overall heat flux by 4.46%, 4.16%, and 2.06%, respectively, compared to those for sintered iron. Thus, the results are essential to improve the thermal characteristics of the copper alloy valve seat imposed on the cylinder head. For validation, an experimental engine thermal survey and uncertainty magnification factors were used to validate the model. The results indicate that the maximum difference between the simulation and experimental values is 8.42%. Therefore, this approach offers a direct and comprehensible application for evaluating the temperature distribution, heat gradient, and heat flux of the cylinder head of air-cooled spark-ignition moped motorcycle engines using copper alloy valve seat materials at intermediate engine speeds. Furthermore, this method is applicable as a platform for the automotive industry to improve the heat transfer of the structural parts of internal combustion engines.

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Drill Bit Design and Its Effect on Temperature Distribution and Osteonecrosis During Implant Site Preparation: An Experimental Approach

2023-01-01 , Islam M.A. , Nur Saifullah Kamarrudin , Ruslizam Daud , Zuradzman Mohamad Razlan , Muhammad Faisal Hamidi @ Abdul Rani , Ibrahim ii

In this study, the drilling parameters will be evaluated to obtain optimal parameters in minimizing the impact of drilling damage on synthetic bone blocks. The effect of damage observed in the study is osteonecrosis that occurs in the drill hole for implant site preparation, where a smaller value is desired. The drilling parameters are optimized using the Taguchi method with two control factors: the feed rate and spindle speed; each parameter is designed in five levels. This experiment was then carried out on four different designs of drill bits, i.e., Twist (118°and 135°), spherical, and conical drill bits. While experimental planning uses L25 orthogonal arrays, the "smaller is better" approach is used as a standard analysis. The main findings of this research are 118° point angle twist drill bit is the ideal type of drill bit for bone drilling, as it produces less heat than other types of drill bits. The optimal range of feed rate and drilling speed for bone drilling is 40-60 mm/rev and 1000-1400 RPM, respectively. Combining these parameters helps to minimize heat generation during implant site preparation drilling.

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Computational fluid dynamic (CFD) of air conditioning system for human thermal comfort analysis: A simulation study

2019-04-08 , Ali A.M. , Shazmin Aniza Abdul Shukor , Rahim N.A. , Zuradzman Mohamad Razlan , Zul Azhar Zahid Jamal , Kohlhof K.

Human thermal comfort is very important especially in an indoor environment because it may effect human's health and welfare. Air conditioning (AC) system has become a necessary tool for indoors to maintain human comfort. This is especially applied to places with high strength of solar radiation, high relative humidity, high air temperature, and low air speed areas which are considered the most critical climate effect for indoors such as in Thailand, Malaysia, and Singapore. However, the current mechanism of the AC system allows the user to set it into maximum cooling, i.e. at the lowest temperature with highest fan speed. This setting does not necessarily create a thermally comfortable environment inside the room, but could contribute towards negative impact to human. Thus, there is a need to study the possibility of integrating the element of thermal comfort with the AC system. This project will concentrate on a case study of the effect of AC towards human thermal comfort in an indoor environment by using computational fluid dynamic (CFD) flow simulation. It adapts an enhanced Predicted Mean Vote (PMV)-based algorithm in creating the thermal comfort environment. The simulation uses SOLIDWORKS software and concentrates on a small sized room with one person doing sedentary work. The flow simulation is done on four conditions-maximum cooling setting and other three that is based on the enhanced PMV algorithm, which were then analyzed and compared. Based on the results, it is shown that the enhanced PMV-based algorithm could provide a thermally comfortable environment compared to the maximum cooling setting.

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Study of eddy current density distribution in a contactless breast cancer detection mechanism using magnetic induction spectroscopy

2017-01-01 , Gowry Balasena , Shahriman Abu Bakar , Zulkarnay Zakaria , Ryojun Ikeura , Zuradzman Mohamad Razlan , Hazry Desa , Wan Khairunizam Wan Ahmad , Cheng Ee Meng , Mohd Afendi Rojan

Breast cancer is a throbbing disease that no longer needs an introduction. This is especially true among women due to their unique breast structure that naturally has more breast tissues compared to that of man’s. It is been forecasted that in 2015, a minimum of 60290 new cases of breast cancer will be reported. The goal of this study is to analytically evaluate the changes in the induced Eddy current densities as a function of di-electrical properties of the breast tissue with respect to tumor positioning as well as its size. This is achieved by running numerical simulations on the proposed mechanism of magnetic induction to detect tumors among healthy breast tissue via a 2D breast model configuration. The analytical results presented in this article, proved that the multi frequency magnetic induction principle is viable in detecting the breast lesions as small as 0.2 cm non-invasively through the distributions of the induced Eddy current density. While important pattern of the induced current were reflected when the tumors are located at the far ends of the breast diameter. The minimum results computational time with the proposed system is 10 s.

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Hurst exponent based brain behavior analysis of stroke patients using eeg signals

2021-01-01 , Choong W.Y. , Wan Khairunizam Wan Ahmad , Murugappan M. , Omar M.I. , Bong S.Z. , Ahmad Kadri Junoh , Zuradzman Mohamad Razlan , Shahriman Abu Bakar , Wan Azani Wan Mustafa

The stroke patients perceive emotions differently with normal people due to emotional disturbances, the emotional impairment of the stroke patients can be effectively analyzed using the EEG signal. The EEG signal has been known as non-linear and the neuronal oscillation under different mental states can be observed by non-linear method. The non-linear analysis of different emotional states in the EEG signal was performed by using hurst exponent (HURST). In this study, the long-range temporal correlation (LRTC) was examined in the emotional EEG signal of stroke patients and normal control subjects. The estimation of the HURST was more statistically significant in normal group than the stroke groups. In this study, the statistical test on the HURST has shown a more significant different among the emotional states of normal subject compared to the stroke patients. Particularly, it was also found that the gamma frequency band in the emotional EEG has shown more statistically significant among the different emotional states.

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Microwave dielectric analysis on adhesive disbond in acrylic glass (Poly (Methyl Methacrylate)) at KU-band

2020-10-01 , Cheng Ee Meng , Mohd A.R. , Shahriman Abu Bakar , Zuradzman Mohamad Razlan , You K.Y. , Nashrul Fazli Mohd Nasir , Mohd Shukry Abdul Majid , Khairul S.B. , Mohd Ridzuan Mohd Jamir , Beh C.Y. , Khor Shing Fhan

A microwave dielectric spectroscopy for detecting adhesive disbonds between acrylic glass (aka Poly (methyl methacrylate)) was discussed. The adhesive bond was developed using epoxy resin and acrylate. The level of joint disbond can be quantified using Young Modulus. In this work, the strength of bond is affected by radius of air void within adhesive bond. A high-frequency electromagnetic wave propagated through two joint acrylic glass with acrylate and epoxy adhesive using waveguide adaptor WR90 in conjunction with professional network analyser. This electromagnetic wave is reflected and transmitted at the bond interface due to mismatch impedance at adhesive bond. The output is a dielectric properties that characterizes the bond interface. The increment of Young Modulus leads to increment of dielectric constant and loss factor for epoxy resin and acrylates, respectively.

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Heat transfer improvement in simulated small battery compartment using metal oxide (CuO)/deionized water nanofluid

2020-02-01 , Bin-Abdun N.A. , Zuradzman Mohamad Razlan , Shahriman Abu Bakar , Voon Chun Hong , Ibrahim Z. , Wan Khairunizam Wan Ahmad , Mohd Ridzuan Mohd Jamir

Improving the heat transfer coefficient of working fluids is essential for achieving the best performance of manufacturing systems. As a replacement of conventional working fluids, nanofluids have a high potential for improving this heat transfer coefficient. However, nanofluids are seldom implemented in actual systems, and several factors should be considered before actual application. Accordingly, this study investigated the thermophysical properties and heat transfer rate of CuO/deionized water nanofluid with and without sodium dodecyl sulfate (SDS) surfactants. Three different volumetric concentrations of the nanofluid were prepared using a two-step preparation method. The experimental steps were divided into two phases: static and dynamic. In these experiments, the thermophysical properties of the prepared nanofluids and the heat transfer coefficient were measured using an apparatus designed based on an actual heat exchanger for a lithium ion polymer battery compartment. The effects of flow rate and surfactants on the heat transfer rate of the nanofluids with varying volumetric concentrations of 0.08%, 0.16%, and 0.40% were analyzed. The results indicate that the heat transfer rate increases considerably as the flow rate increases from 0.5 L/min to 1.2 L/min and with the presence of surfactants. The highest heat transfer rate was obtained at a 0.40% volumetric concentration of CuO/deionized water nanofluid with SDS surfactant.

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Thermal Management System Analysis Concentrate on Air Forced Cooling for Small Space Compartment and Heat Load

2021-12-01 , Yahaya M.N. , Ghani A.Z.A. , Zuradzman Mohamad Razlan , Rahman A.A. , Bakar S.A. , Wan Khairunizam Wan Ahmad , Harun A. , Hashim M.S.M. , Mohd Khairul Faizi Abd Rahman , Ishak Ibrahim , Kamarrudin N.S.

Battery thermal management system (BTMS) plays an important thing as to control of the battery thermal behaviours. Recently, most of the manufacturer either in automobile, motorcycle, and electric vehicle (EV) industry are using this application of BTMS for their product. It is because BTMS promising the extend the period and lifespan of the battery and the battery system controlling the temperature distribution and circulation on the system. Lithium-ion battery is one of the common usages in BTMS. Lithium-ion battery promising the goals such as higher performance, better cycle stability, and improved protection are being followed with the selection and engineering of acceptable electrode materials. It also shows a goal for future such as high of the energy storage due to higher energy density by weight among other rechargeable batteries. However, there still have factor that are limiting the performance/application when using lithium-ion as battery thermal management system (BTMS). For example, the performance, cost, life, and protection of the battery. The main reason is therefore important in order to achieve optimum efficiency whenworking under different conditions. Hence, the best range of temperature and the cooling capacity of lithium-ion battery need to evaluate in order to increasing the lifespan of lithium-ion battery at the same time can increasing the performance of the cell. This study found that the higher the velocity of air, the higher the cooling capacity that gain from the surrounding. It also was strongly related to the dry bulb temperature of surrounding air.

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A review of the application and effectiveness of heat storage system using phase change materials in the built environment

2021-05-03 , Ibrahim Z. , Newby S. , Hassani V. , Ya'akub S.R. , Shahriman Abu Bakar , Zuradzman Mohamad Razlan , Wan Khairunizam Wan Ahmad

Global warming is the most significant threat that civilization faced within the 21st century. Buildings, which account for 40% of global consumption of energy and greenhouse gas emissions, play a key role in global warming. It is estimated that their destructive impact will grow by 1.8 percent per year by 2050, indicating that future energy consumption and emissions will be more critical than they are today. Therefore, the use of a latent heat storage system using phase change materials (PCM) is one of the effective ways of storing thermal energy and has the advantages of high-energy storage density and the isothermal nature of the storage process. PCM has been widely used in latent heat thermal storage systems for heat pumps, solar engineering, and spacecraft thermal control applications. Thermal energy conservation by latent heat is an ideal way to increase the thermal inertia of building envelopes, which would minimize temperature fluctuations, contributing to increased occupants' thermal comfort. For this reason, high-density PCM can be used effectively. This paper reviews recent studies of the application and effectiveness of using PCM in the built environment.

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