Nasrudin Abd Rahim

University of Malaya | UM ·  UM Power Energy Dedicated Advanced Centre (UMPEDAC)

Clean energy and environmental pollution are two key concerns of modern society and are pivotal necessities for the economic, social, and sustainable development of the world. Today around 80% of energy is generated using nonrenewable resources and fossil fuels (oil, gas, coal) which ultimately results in hazardous global emissions. As a clean subs...

High conversion ratio dc-dc converters have received significant attention in renewable energy systems, primarily due to their necessary high-gain characteristics. This research proposes a high step-up ratio full-bridge resonant cascaded (FBRC) dc-dc converter designed for use in photovoltaics (PV), fuel cells (FC), electric vehicles (EV), and othe...

Phase Change Materials (PCMs) are generally considered as a potential candidate for thermal energy storage (TES) as they possess excellent latent heat. TES system's thermal management potential is greatly hampered due to the degraded thermal conductivity of PCMs. The present study explores the long‐term durability (potential degradation) of eutecti...

Solar photovoltaic (PV) is a crucial renewable energy source in the fight against carbon dioxide emissions, aligning well with growing energy demands. However, solar PV efficiency naturally degrades over time, primarily due to uncontrollable outdoor factors such as irradiance, humidity, shading, soiling, aging, and temperature. These collectively l...

The dust accumulation and dirt particles always degrade the transparency of glass, later hampers its various applications such as photovoltaic panels, building glass, and car-windshield. In this study, the hydrophilic self-cleaning coatings have been developed by using the nanocalcium Carbonate particles (nanoCaCO3) and hydrophilic micro-titanium d...

Malaysia is currently pushing for greater solar photovoltaic (PV) penetration through various policies, hence need to assess the consequent PV waste situation in preparation for sustainable End-of-Life (EoL) management of the PV systems. Through incorporation of fixed-loss, early-loss, and regular-loss scenarios into Malaysia's PV roadmap, it is pr...

Thermal energy in the industrial sector for process heating applications in the range of 50 to 250°C consumes about 35% of the global fossil fuel. Cascaded solar thermal systems are promising solutions to meet clean and uninterrupted thermal energy supply for industrial process heating. Well-engineered cascaded arrangement of solar thermal collecto...

One of the biggest problems facing medical science today is preventing viral outbreaks, which highlights the significance of research initiatives aimed at creating antimicrobial coatings for a range of products, including textiles, medical devices, and public spaces. In this study, we aimed to determine the possible antiviral effects of polyethylen...

Thermal energy storage (TES) using phase change materials (PCMs) has been extensively utilized to improve the efficiency of photovoltaic thermal (PVT) systems. High-conductive nanofillers have been an effective method to improve PCM's energy efficiency and thermal management systems. This research modifies high-capacity paraffin using graphene nano...

Flexible dye sensitized solar cells (DSSCs) possess multiple advantages with wide application and good commercialisation potential. However, the low conversion efficiency of the technology from poor charge transfer and interparticle contact has limited their utilisation. Thus, the research aims to enhance the performance of flexible plastic-based t...

Purpose This paper aims to fabricate a polymer-based polyethylene glycol (PEG) coating with acrylic resin as a binder that can show antiviral activity against the feline coronavirus (FCov) on the glass substrate. Design/methodology/approach The PEG/acrylic coating systems of different weight percentages were coated on the glass substrates using th...

Purpose-There is a strong inducement to develop new inorganic materials to substitute the current industrial pigments, which are known for their poor ultraviolet absorbent and low photoluminescence (PL) properties. The purpose of this paper is to invent a better rare-earth-based pigment material as a spectral modifier with good luminescence propert...

This paper portrayed the EE initiatives that could assist in reducing energy (kWh), cost (RM), and CO2 (tonne) simultaneously in a building. A case study of Wisma R&D, UM was referred. The environmental-based impact of the lighting retrofitting projects initiatives at Wisma R&D was used in this study to illustrate the importance of EE approaches. T...

The education sector is one of the contributors to greenhouse gas emissions. Therefore, the education sector strongly supports the government's aspirations to reduce carbon emissions. Energy consumption is related to the amount of carbon emission production—energy consumption information helps to forecast energy savings while creating carbon emissi...

As evidenced from recent policies encouraging renewable energy (RE) penetration in Malaysia, it is envisioned that solar photovoltaic (PV) in the country will receive a significant boost in growth as well. The proliferation of solar PV systems is viewed as a great leap in assisting the decarbonization of our energy generation systems, yet concerns...

In this paper, a high-current DC-DC converter with bidirectional capability is presented. The proposed converter topology combines a series capacitor bidirectional converter and a conventional bidirectional converter in a cascaded manner, thus achieving a quadratic voltage gain. The proposed topology is compared with other contemporary high current...

Optimal solar energy utilization can be achieved with a Photovoltaic Thermal (PVT) system, which simultaneously produces electricity and heat. PVT generally uses water as heat transfer fluid to cool the PV cells while transporting heat for other purposes. However, water has low thermal conductivity and capacity as a heat transfer fluid. Nanofluid,...

Solar water heating (SWH) systems have yet to be widely employed despite their promising features for hot water production, especially in rural areas. This paper discusses several setbacks to the implementation of SWH systems. Generally, the setbacks are related to weather issues, the collector’s technical damages, and financial constraints. A few...

Due to its attractive features of bidirectional power flow, zero-voltage switching (ZVS), high power density, and electric isolation, the current source-based isolated dual-active-bridge (IDAB) dc–dc converter is widely employed in various renewable energy applications. Efficacy and sublime dynamic performance are two primary control objectives for...

Flexible dye sensitized solar cell (DSSC) developed at low temperature with low conversion efficiency due to the poor interparticle contact and charge transfer has limited their further development. In this research, bismuth (Bi) nanoparticles were implemented as titanium dioxide (TiO2) photoanode sintering aid to combat this issue. By utilising th...

The solar light radiation causes some of the heat to be trapped inside the solar cell that raises the solar cell’s temperature, then reduces the electrical efficiency of the overall system. The thermal radiation from solar light causes overheating on the solar cell surface and degrades its functionality. In this study, the thermal insulation coatin...

Photovoltaic thermal (PVT) systems have been developed for nearly five decades as a further development of PV technology. The PVT system was designed to overcome the limited space for PV and solar water heaters and improve PV cell performance. However, many studies on PVT are theoretical and modeling, so experimentation is needed to confirm it. Thi...

Energy is one of the basic inputs and driving forces for economic and social development modernization. Sustainable energy supply is one of the major challenges in the modern world. Sustainable energy supply can be obtained through alternative energy sources, and efficient energy use is a high priority to optimize the environmental impact. This pap...

The injection of dc current offset into ac networks may impacted the lifespan of the distribution system equipment including isolation transformers and measurement devices and in serious event may cause equipment’s malfunction. This paper intents to eliminate dc current offsets in the output currents using a combinational of proportional-integral (...

Solar photovoltaic (PV) technology has a lower adoption rate than expected because of different weather conditions (sunny, cloudy, windy, rainy, and stormy) and high material manufacturing costs. To overcome the barriers to adoption, many researchers are developing methods to increase its performance. A photovoltaic–thermal absorber hybrid system m...

The poor interparticle connectivity between the nanoparticles architecture of photoanode due to insufficient sintering temperature has been an issue for developing flexible dye sensitised solar cell (DSSC). This issue has led flexible DSSC to yield low conversion efficiency. This research aims to implement lead (Pb) as sintering aid to improve the...

Rising greenhouse gas emissions stemming from fossil fuel-driven vehicles are causing damage to the environment. To counteract this, one solution is the adoption of electric vehicles (EV) for transportation requirements. In this regard, one category of EVs that requires special attention is light electric vehicle (LEV), mainly because of their wide...

Purpose The purpose of this paper is to introduce the simple synthesis process of thermal-insulation coating by using three different nanoparticles, namely, nano-zinc oxide (ZnO), nano-tin dioxide (SnO 2 ) and nano-titanium dioxide (TiO 2 ), which can reduce the temperature of solar cells. Design/methodology/approach The thermal-insulation coating...

Energy is one of the essential inputs for modernization and social development. Energy demand is increasing, and the primary energy source is fossil fuels, which negatively impact the environment. Energy saving and renewables are the potential solutions which could minimize environmental impact. This paper investigates the energy-saving and solar p...

Adaptive protection schemes (APS) have gained prominence in maintaining the integrity of overcurrent relay (OCR) settings in reconfigurable networks. While many APSs rely on supervisory control and data acquisition systems, they are very expensive and expose the system to vulnerabilities arising from communication failures. Recent studies have prop...

Distributed generator of renewable energy (DGRE) requires ancillary services for protection against disturbances in the grid system. Hence, a current limiting property is crucial for the DGRE to achieve self-protection. However, such property would reduce the generated power that corresponds to optimum current injection. In order to overcome this s...

In this paper, a fault-tolerant three-phase induction drive based on field-oriented control is studied, and an analytical approach is proposed to elucidate the limitations of FOC in flux-torque regulation from the controller perspective. With an open-phase fault, the disturbance terms appear in the controller reference frame and degrade the control...

Dispersion of highly conductive nanoparticles in Phase Change Materials (PCMs) tends to improve the thermophysical properties of nanocomposites. The current research condenses the synthesis, chemical, physical, and thermal characterization of novel nano-enhanced eutectic phase change materials (NeUPCMs) dispersed with TiO2 nanofillers for thermal m...

Due to the high power density, inherent zero‐voltage‐switching (ZVS), and high voltage‐ conversation ratio, the current source‐based isolated dual‐active‐bridge DAB–DC/DC converters are extensively used for charging EVs under constant‐current mode. However, the fast dynamic response of an output current is a crucial requirement for dual‐active‐brid...

The integration of hydrogen in the primary energy mix requires a major technological shift in virtually every energy-related application. This study has attempted to investigate the techno-economic solar photovoltaic (PV) integrated water electrolysis and waste incineration system. Three different strategies, i.e., (i) PV + Battery(Hybrid mode with...

Clean water demand has significantly increased due to the rise in the global population. However, most water on the Earth has high saline content that cannot be consumed directly; only about one over forty of the total water source is freshwater. Desalinated water is one of the potential solutions to meet the growing demand for freshwater, which is...

Dye sensitised solar cells (DSSCs) have been in extensive development in recent years in the field of solar energy due to its cost-effectiveness, ease in fabrication, flexibility, and being able to be transparent and coloured as well. Two broad categories of DSSCs based on their fabrication temperature are (1) high-temperature DSSCs and (2) low-tem...

Purpose This paper aims to design the nano-titanium dioxide (TiO 2 ) coating system which has superhydrophilic property, self-cleaning mechanism and antifog property as well as strong adhesion on glass substrate. Design/methodology/approach Two hydrophilic materials have been used such as TiO 2 nanoparticles as fillers and hydrophilic copolymer, P...

Purpose This paper introduced the simple synthesis process of self-cleaning coating with fog-resistance property using hydrophobic polydimethylsiloxane (PDMS) polymer and nano-calcium carbonate (nano-CaCO 3 ) and titanium dioxide (TiO 2 ). Design/methodology/approach The synthesis method of PDMS/nano-CaCO 3 -TiO 2 is based on sol-gel process. The...

An energy-efficient building is not built in a day. It requires effective processes, approaches, and tools, as well as high commitment from all the involved parties. A similar requirement is needed for effective retrofitting practice. Building Information Modelling (BIM) is one of the sensible processes in ensuring either the new building developme...

The photovoltaic thermal (PVT) system was initially developed by attaching a simple sheet and tube thermal collector to the PV panel to improve cell performance while producing heat energy. The collector designs and heat transfer fluid are the main focus of PVT research, with the sheet and tube collector being the direct reference, and nanofluid be...

Among the renewable energy resources, solar thermal is one of the technologies that significantly contribute to energy supply and reduce global greenhouse gas (GHG) emissions. Solar water heating (SWH) contributes a large proportion of the global solar thermal capacity, with 63% installation for domestic hot water (DHW) systems, 28% for large DHW s...

The considerable amount of waste PV modules expected to emerge from recent widespread of solar photovoltaic (PV) systems is a cause of concern, especially in sustainability terms. Currently, most end-of-life (EoL) PV modules are either disposed of in landfills or bulk recycled in existing recycling facilities. Although these approaches are easier i...

This paper presents a new technique to mitigate the high voltage stress on the secondary gallium nitride (GaN) transistor in a high step-up flyback application. GaN devices provide a means of achieving high efficiency at hundreds (and thousands) of kHz of switching frequency. Presently however, commercially available GaN is limited to only a 650 V...

Concentrated Photovoltaic (CPV) system is one of the efficient and economical photovoltaics (PV) technologies. The fundamental principle of using CPV system is a substitution of expensive cell area with inexpensive optics. Concentrating the solar radiation on small areas enhances the power output. However, operating at high temperatures can potenti...

The growing demand for high energy and power density in lithium-ion batteries mandates the utilization of cathode material with improved capacity and output voltage. Among various cathode materials, spinel structured lithium manganese oxide stands out for its acceptable energy density, high working voltage, excellent safety, and cost-effectiveness....

In recent years, coreless axial‐flux permanent‐magnet (AFPM) machines have been gaining attention. Being coreless, these machines do not experience eddy current (hence hysteresis losses) and has lower cogging torque leading to higher efficiency. However, limitations such as high leakage flux and weak mechanical structure impede its wide application...

This review article focuses on the recent development of transparent self-cleaning coating based on the glass panel application especially for the photovoltaic (PV) panel industry, automobile industry, and building glass industry. The study on wettability revolutionized the development of self-cleaning property that leads to higher demand from indu...

The thermal properties of Phase Change Material (PCM) can be altered by introducing nanoparticles, and composite formed from the addition of nanoparticles are termed Nano-Enhanced Phase Change Materials (NEPCM). In the present study, the enhancement of thermal conductivity and feasibility study of dispersing multi-walled carbon nano tubes (MWCNTs)...

In recent years, a good number of research works have been conducted to elucidate the different aspects photovoltaic thermal (PV/T) technology. However, in order to take a technology to its maturity level, it is important to explore its internal physics and identify the factors that control system performance. With this view, in the present researc...

A steady rise in the ownership of vehicles in Malaysia has drawn attention to the need for more effective strategies to reduce the emissions of the road transport sector. Although the electrification of vehicles and replacing petrol with biofuel are the strategies being considered in Malaysia, these strategies have yet to be fully evaluated from an...

The purpose of this study is to evaluate the wind energy potential and energy cost of various types of wind turbines that could be powering rural Areas. The analysis was performed on hourly wind data over three years for five locations measured with a 10 m-high anemometer in Peninsular Malaysia. The performance of wind turbines with varying hub hei...

Renewable photovoltaic (PV) energy is a primary contributor to sustainable power generation in microgrids. However, PV grid-tied generators remain functional as long as the grid voltage and the input PV source remain normal. Abnormal conditions like transient grid sags or solar irradiation flickering can make the grid-tied inverter go offline. Simu...

Spinel lithium manganese oxide, LiMn2O4 coated with V2O5 layer (labeled as LMO‐VO) has been developed and its electrochemical performances as cathode material for lithium‐ion batteries has been evaluated at high cut‐off voltage (>4.5 V vs. Li/Li⁺) and compared with pristine LiMn2O4 (labeled as LMO). The crystal structure investigations show that LM...

Dye‐Sensitized Solar Cells (DSSCs), also known as Grätzel cells, are a third‐generation photovoltaic technology that has garnered extensive interest due to its simplicity of fabrication, economical, and relatively high power conversion efficiency (PCE). The PCE of the photovoltaic cells is primarily related to the architecture of the cells, as well...