Nurhafiza Azizan
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Preferred name
Nurhafiza Azizan
Official Name
Nurhafiza, Azizan
Alternative Name
Azizan, N.
Azizan, Nurhafiza
Azizan, N. S.
Main Affiliation
Scopus Author ID
57189593226
Researcher ID
GQR-9188-2022

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  • Publication
    Investigation of solar energy production by Photovoltaic (PV) system using rooftop coating as passive cooling technique at Bukit Tinggi, Malaysia
    (Semarak Ilmu Publishing, 2025-04)
    Ahmad Zaidi Abdullah
    ;
    Nurhafiza Azizan
    ;
    Nurul Atiqah Kadir
    ;
    Nurul Nadirah Mohd Hussin
    Solar power energy is known as one of the popular renewable energies that has been studied by many researchers all over the world. Photovoltaic (PV) panels are used to produce electricity directly from the sunlight. Cooling is a very important technique used in the PV system industry. This is because the heat generated by the PV system can reduce its performance, resulting in higher costs. The cooling technique consists of two types: active cooling technique and passive cooling technique. In this investigation, the passive cooling technique is selected. This is due to its advantages such as less maintenance, did not require large space and affordable. The nanocoating method is a widely used as passive cooling method for glass and PV panels. However, this investigation is carried out to investigate the rooftop coating integrated with PV panels system at Bukit Tinggi due to the limited previous research found worldwide. M168 coating is applied to the rooftop and the effects on the PV systems have been investigated. Two sets of On-Grid Connected PV systems were set up; where each system consists of two inverters were set up to analyze the output. The results then were recorded. According to the investigation results, the PV system with a coated rooftop generates a higher voltage of 249.80V and total power production difference of 16% compared to the PV system with an uncoated rooftop. Although the temperature for coated rooftop PV system quite higher than the uncoated rooftop PV system at the beginning, then the temperature constantly lower than the uncoated rooftop PV system. This study can be used as a guideline for PV system passive cooling methods at Bukit Tinggi.
  • Publication
    Water-Based Energy Production Using PI Controller
    (Springer Science and Business Media Deutschland GmbH, 2022-01-01)
    Ali N.I.H.M.
    ;
    Nur Irwany Ahmad
    ;
    Muhammad Zaid Aihsan
    ;
    Diyya Hidayah Abdul Rahman
    ;
    Mohamad Shukor Abdul Rahim
    ;
    Nurhafiza Azizan
    ;
    Mokhtarddin H.
    ;
    Jalaludin B.M.
    ;
    Zaidi A.A.H.
    ;
    Saleh A.
    Malaysia is now heading for usage of renewable energy in daily use. Nowadays, solar technologies already provide energy for heat, light, hot water, and electricity for businesses and industries. Besides, Malaysia blessed with abundance of water sources and receive high rain volume per year which can be used to generate power. In Malaysia, the ambient temperature is approximately 27 ℃ but it depends on the different location. Different location has different temperature regarding to its different environment. Even though the peak sun hour in Malaysia is 5 to 7 hours per day, the ambient temperature from 32.2 to 35 ℃, can be consider as high temperature. The Standard Test Condition (STC) of solar photovoltaic (PV) is 25 ℃. Therefore, if temperature higher than 25 ℃ is used, it will drop the efficiency of solar PV. To overcome this problem, a new concept of energy production using hybrid system of piezoelectric and peltier generator prototype is developed. In this research, a buck boost converter using Proportional Integrated (PI) controller is designed to boost the output and maintain it in the range of output needed from the harvesting system, which is 12 V. MATLAB software is used to design and simulate the circuit. Hence, the performance of water-based prototype has been evaluated and analyzed based on voltage, current and the power produced by the prototype.
      2  4
  • Publication
    Development of savonius vertical windmill with charging system
    ( 2022-01-01)
    Halim N.A.W.A.
    ;
    Diyya Hidayah Abdul Rahman
    ;
    Ahmad N.I.
    ;
    Habibah H.M.
    ;
    Norhanisa Kimpol
    ;
    Nurhafiza Azizan
    ;
    Ahmad Zaidi Abdullah
    ;
    Nur Zawatil Zakaria
    The goal of the project is to achieve an output voltage at range 1 V until 13 V. In recent years, the use of small- scale green energy technologies has grown exponentially. This further highlights the need for innovation in this area, especially for small-scale applications. Global warming results from carbon dioxide gas accumulation in the atmosphere and the depletion of the ozone layer and carbon dioxide emissions from fossil fuels. To get the clean energy sources are not only an alternative to a finite supply of fossil fuels but also a way of helping to mitigate the harm that have been caused. Researchers around the world are looking into cheaper, renewable, and more reliable sources of energy which is wind turbine to produce kinetic energy and transformed into electrical energy. Usually the size of wind turbine was larger and heavy. Therefore, this research aims to design the Savonius vertical windmill with a charging system that displays the desired output. This research used SolidWorks software to design the blade and generator part and using Arduino software to control the charger circuit. The outcomes investigation result from Savonius vertical windmill affordable to produce output voltage of 2.33 V.
      4  34