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All Journal International Journal of Electrical and Computer Engineering JOIV : International Journal on Informatics Visualization
Moh Nazar, Nazatul Shiema
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Computer Science & IT Electrical & Electronics Engineering

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Effect of silica nanofiller in cross-linked polyethylene as electrical tree growth inhibitor Moh Nazar, Nazatul Shiema; Syazwani Mansor, Noor; Khayam, Umar; Asiah Muhamad, Nor; Jaafar Mustapha, Mariatti; Izzani Mohamed, Amir; Mohd Jamil, Mohamad Kamarol
International Journal of Electrical and Computer Engineering (IJECE) Vol 12, No 3: June 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v12i3.pp2256-2263

Abstract

One of the main phenomena that contributes to the non-success of cable insulation made of cross-linked polyethylene (XLPE) is electrical treeing. To improve the XPLE cable insulation, the use of nanofiller has been introduced. Adding the nanofiller in the based composite offers better cable lifetime and resistance to deal with the cable failure. One of the potential nanofillers that can increase the insulation performance of XLPE cable is silica nanofiller. To this extent, the studies on silica nanofiller in XLPE are focusing on the impulse breakdown strength, dielectric loss, permittivity, space charge, alternating current (AC), and partial discharge. The studies reveal that the dielectric properties of the XLPE nanocomposite have significant improvement. Therefore, this work investigates the effect of various concentrations of silica nanofiller in XLPE composite as electrical tree inhibitor. The concentrations of silica nanofiller in XLPE were 0.25 wt%, 0.5 wt%, 0.75 wt%, 1.0 wt%, 1.25 wt%, 1.5 wt%, and 1.75 wt%. The silica nanofillers have 96%-99% purity, 20-30 nm sizes and the shapes are spherical. As a result, the XLPE composite containing 1.5 wt% silica nanofiller demonstrate higher tree inception voltage and detaining the tree propagation speed, which could be considered as an inhibitor medium of electrical tree growth.
A Case Study on Energy Efficiency at Universiti Pertahanan Nasional Malaysia (UPNM) Building for Smart Campus Initiatives Thanakodi, Suresh; Ismail, Nur Hidayah; Moh Nazar, Nazatul Shiema; Mukhtaruddin, Azharudin; Hidayat, Hendra; Mohd Isa, Mohd Rizal
JOIV : International Journal on Informatics Visualization Vol 9, No 4 (2025)
Publisher : Society of Visual Informatics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62527/joiv.9.4.3409

Abstract

In efforts to minimize harmful greenhouse gas (GHG) emissions and mitigate climate change, energy efficiency has become a global priority. Commercial buildings, including university facilities such as Universiti Pertahanan Nasional Malaysia (UPNM), play a significant role in this effort, particularly in becoming a smart campus. Commercial buildings have been identified as major contributors to greenhouse gas (GHG) emissions, primarily due to their high energy consumption for air conditioning, lighting, and other operational needs. In alignment with the Paris Agreement 2016, the Malaysian government has implemented various energy-saving initiatives to reduce carbon emissions and achieve Energy Efficient Building Star Ratings. This study analyses five years of energy consumption at UPNM using the desktop audit method. Data collected from January 2018 to December 2022 includes the Nett Floor Area (NFA), energy consumption, and maximum demand of the UPNM buildings. The analysis encompasses energy consumption and expenditure, maximum demand, Building Energy Intensity (BEI), carbon footprint, and building energy labeling under the National Building Energy Labelling Standard. The findings indicate that UPNM has achieved a 5-star rating in 2020 and 2021, compared to a 4-star rating in 2018, 2019, and 2022. The BEI of UPNM buildings from 2018 to 2022 met the Energy Commission (EC) requirement of being below 135 kWh/m²/year. This study has also identified recommendations for further enhancing the energy efficiency of the UPNM Building, including regular maintenance of electrical appliances and conducting energy efficiency awareness campaigns.
Co-Authors Hendra Hidayat Ismail, Nur Hidayah Izzani Mohamed, Amir Jaafar Mustapha, Mariatti Khayam, Umar Mohd Isa, Mohd Rizal Mohd Jamil, Mohamad Kamarol Mukhtaruddin, Azharudin Nor Asiah Muhamad Suresh Thanakodi, Suresh Syazwani Mansor, Noor