N.A. Rahim's research while affiliated with University of Malaya and other places
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Publications (79)
![Emission factor per unit of energy used for various types of fuels [7].](profile/Mfm-Zublie/publication/366983427/figure/tbl3/AS:11431281112078769@1673317432345/Emission-factor-per-unit-of-energy-used-for-various-types-of-fuels-7_Q320.jpg)
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...
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...
Production of hydrogen by means of renewable energy sources is a way to eliminate dependency of the system on the electric grid. This study is based on a technique involving coupling of an oxyhydrogen (HHO) electrolyzer with solar PV to produce clean HHO gas as a fuel. One of objectives of this study was to develop a strategy to make the electrolyz...
Global energy demand continues to increase with the expansion of the economy activities and sustainable development. Meanwhile, the world is suffering from pollution and harmful greenhouse gases originated from burning of fossil fuels where the consequences of climate changes are also alarming. Solar energy is an alternative energy source that is a...
Electric vehicles (EVs) have a huge potential to dominate over the conventional combustion engine vehicles and become the future of road transport while conserving this planet from threatening calamities caused by global warming. EVs offer several benefits over internal combustion engines, especially in terms of lower emission of greenhouse gases,...
In this paper, a multilevel inverter based on cascaded half-bridge and three-phase unfolder is proposed. The proposed inverter design is simulated by using MATLAB Simulink. The converter is designed with four series-connected half-bridge cells and a three-level neutral-point-clamped inverter. The proposed converter is able to produce an output volt...
Low power distributed Photovoltaic (PV) systems would be a dominant power generator in future grids. This PV penetration significantly influence the grid stability, especially in an event of grid faults. Traditional PV inverters disconnect themselves from grid on detecting a low voltage at their point of common coupling (PCC). A temporary low volta...
Photovoltaic thermal (PVT) systems have emerged as a well-engineered upgradation of photovoltaic (PV) modules that deliver both electricity and heat simultaneously. However, practicable performance is yet to be realized from these systems on commercial basis. In the present research, nanoparticle enhanced phase change material (NePCM) has been inco...
Two titanium dioxide/reduced graphene oxide (TiO2/rGO) based dye-sensitized solar cells (DSSCs) were fabricated and separately sensitized with natural dye extracted from Roselle flowers and ruthenium-based dye of N719. The current-voltage (I-V) performances were measured using Visiontec Solar I-V tester at standard illumination of AM1.5 and irradia...
An electrolyte is the main component of a dye-sensitized solar cell (DSSC) which influences the efficiency of the DSSC. In order to prevent leakage problem and adhesive problem, new solid-state polymer electrolyte proposed rather than using a liquid electrolyte. For this research, new copolymers using 2-hydroxyethyl methacrylate (HEMA) and Ethyl Ac...
Industrial process heating applications in the temperature range of 50°–250 °C consumes about 35% of the global fossil fuels, wherein solar thermal is envisaged as an alternative option. Outlet temperatures of both flat-plate collector (FPC) and photovoltaic thermal collector (PVT) are not high enough to serve industrial processes. In this article,...
An educational institution is one of the sectors that consume a high amount of energy. An identify the energy consumption gives information to forecast the energy saving. The research aims to utilize rooftop solar photovoltaic (PV) at non-academic buildings in Malaysia’s educational institution. A detailed energy audit has been conducted at Politek...
The building sector is one of the major energy users and greenhouse gasses emitter. An energy audit is one of the effective approaches to identify efficient energy usages and energy savings. A details walk-through energy audit has been conducted to analyse the energy consumption pattern and potential energy conservation opportunities (ECOs) in Rese...
In order to meet the increasing energy demands of the modern-day world, the shift towards renewable energy has proved to be a viable alternative, as it has significantly reduced reliance on conventional energy resources. Solar energy, in particular, remains one of the best available renewable energy options, as it is abundant, clean and reliable. O...
Worldwide primary energy needs are satisfied basically from non-renewable sources that are limited in supply and innately hazardous to the environment. Biomass-based power systems are very much potent to address the environmental issues fostering sustainable development, while being able to provide a secured and uninterrupted power supply at the sa...
This paper proposes a grid-tied PV inverter installed at the low voltage side of a distribution grid. The architecture considers the operation of a grid-tied inverter and its robustness against the grid faults. Unlike previously proposed low-voltage-ride-through (LVRT) operation, the proposed control provides maximum-power-point-tracking (MPPT) in...
This paper presents the design and analysis of a three‐level hybrid boost converter based on a single‐phase three‐level T‐type inverter. The proposed converter can provide high energy conversion efficiency and high voltage gain capability with reduced component count. The pulse‐width‐modulation signals of the proposed converter are generated by com...
This paper provides energy, exergy and environmental analyses for hybrid photovoltaic-thermal based combined heat and power system. Grid-connected configuration was used to increase the system reliability when satisfying the load. A series of battery and hot-water storages were applied for saving the excess of electricity and heat, respectively. Te...
Purpose
The purpose of this paper is to investigate the chemical, optical and photovoltaic properties of titanium dioxide/reduced graphene oxide (TiO 2 /rGO) photoanodes immersed in natural Roselle and synthetic (N719) dyes for dye-sensitized solar cell (DSSC) application.
Design/methodology/approach
TiO 2 mixed with rGO were doctor-bladed on fluo...
With the growing concerns on the energy depletion and the reduction of CO2 emission, electric vehicles (EVs) have gained popularity in transport sector due to clean and reliable energy source. However, the charging of EVs has imposed significant load in the electrical distribution system. The stability of power network is disturbed with uncoordinat...
Energy is the essential need for the development, modernization and economic growth of any nation in the industrial sector. About 32–35% of the total energy of the world is used in the industrial sector. Solar thermal energy application is an initiative towards the sustainable and zero-carbon energy future. Solar thermal collectors are recognized a...
Photovoltaic (PV) sources have recently become one of the most mature technologies. With the increasing penetration level and the integration of a PV system into the grid, the stability and reliability of the power networks have been serious concerns. Thus, grid codes are being released by grid operators for low voltage networks under grid faults....
Sustainable power generation, energy security, and global warming are the big challenges to the world today. These issues may be addressed through the increased usage of renewable energy resources and concentrated solar energy can play a vital role in this regard. The performance of a parabolic-trough collector’s receiver is here investigated analy...
Buildings account for a vast amount of energy consumption in Malaysia. Occupant behaviour patterns are a major factor affecting the energy performance of buildings. Identifying energy waste due to occupant behaviour will allow stakeholders to develop effective strategies to curtail energy consumption in buildings. The purpose of this study was to i...
The use of renewable energy resources such as solar, wind and biomass will not diminish their availability. Sunlight being a constant source of energy is used to meet the ever-increasing energy need. This review discusses the world's energy needs, renewable energy technologies for domestic use, and highlights public opinions on renewable energy. A...
This study is directed to specifically clear on the data's parametric effect on the hydrogen production utilizing the sun based energy through the water electrolysis. The Analysis of Variance (ANOVA) technique is used to check and verify on the potentials of other factual demonstrative devices with respect to the real and anticipated quality, the r...
This study presents the optimization of parameter operation in (PEMFC) Proton Exchange of Fuel cell using the electrical model and the mathematical model. The parameters of the fuel cell are hard to be determine since, the developer did not provides their parameter in details. The modelling of thermodynamic mathematical model and the electrical mod...
In building sector; number of layers and type of glazing material as well as the embedded shading selection could contribute differently towards the internal heat gain which later impacted directly towards the cooling need within a building. A typical residential building in equatorial climate is modeled using Building Information Modelling (BIM)....
Over the past few years, high step-up dc-dc converters have been drawn substantial attention because of their wide-ranging application not only in the renewable energy sector but also in many other applications. To acquire a high voltage gain in photovoltaic (PV) and other renewable energy applications, a high step-up dc-dc converter is proposed in...
Photovoltaic thermal (PV/T) collectors that supply both electricity and heat are growingly becoming popular in household and other applications. However, efficient heat removal from backside of PV module is still a challenge that hampers its electrical as well as thermal performance. In the present research, an absorber-plate less thermal collector...
Solar thermal utilization, especially the application of solar water heater technology, has developed rapidly in recent decades. Solar water heating systems based on thermal collector alone or connected with photovoltaic called as photovoltaic-thermal (PVT) are practical applications to replace the use of electrical water heaters but weather depend...
Anatase titanium-germanium (TiO2-Ge) nanocomposite has been prepared by using colloidal suspension process and investigated for photoanode to be used in dye sensitized solar cell. Ge possesses lower band gap energy compared to TiO2 and has the capability to absorb infrared region of solar spectrum. Its remarkable absorption and good electron transf...
![Table 2 . Average meteorological data of different are of Malaysia [8].](publication/325288477/figure/tbl1/AS:668935045263374@1536497951544/Average-meteorological-data-of-different-are-of-Malaysia-8_Q320.jpg)
Power generation from sun oriented vitality through a photovoltaic (PV) system is ended up prevalent over the world due to clean innovation. Geographical location of Malaysia is very favorable for PV power generation system. The Malaysian government has also taken different steps to increase the use of solar energy especially by emphasizing on buil...
Potential induced degradation (PID) is one of the genuinely critical concerns of a sustainable power generation from a PV system. Generally, the PID behavior of a PV module is tested in the laboratory according to the IEC standard before installation into a plant. On the other hand, an electroluminescence imaging is a reliable technique to identify...
Photovoltaic (PV) power plant capacity is growing very fast in Malaysia. The operating capacity of a PV plant digresses from the installed capacity after several years of operation. The degradation rate of different poly and mono crystalline silicon PV modules due to real field aging at various time spans has been detected by EL imaging, maximum po...
On-site investigation of PID behavior of PV module has been carried out under typical Malaysian climate. A quantitative degradation measurement process of PV module through EL imaging has been introduced. PID has been observed only for the negative voltage stress in this p-type polycrystalline Si PV module. The negative end PV module degrades 42% d...
In this research, an indoor experiment has been carried out of a PV module under controlled operating conditions and parameters. A novel design of thermal collector has been introduced, a complete PVT system assembled and water/MWCNT nanofluid used to enhance the thermal performance of PVT. An active cooling for PVT system has been maintained by us...
Over the last few decennia, power DC/DC converters have been the subject of great interest due to its extensive increment of utilization in different applications. A thorough review on recent developed power DC/DC converters is presented in this paper. The study is focused on the topologies in different applications such as renewable energy, automo...
Load factor is one of the indicator which describe how energy is being consumed in premises. Eventhough there are various other factors such as capacity factor, use factor and others; load factor can be calculated by the customer or the premise’s owner from their monthly utility bill. This study investigates the consumption characteristic of electr...
One of the advanced power applications using energy storage is the integration of energy storage technologies with VSC-based FACTS controllers. With the support of energy storage device, FACTS controllers will have the ability to exchange active power or energy with the ac network in steady state. This paper discusses the impact of Static Synchrono...
This study illustrates a crossbreed arrangement of the sun-oriented and wind innovation that uses the sun-powered photovoltaic cells and the wind turbine frameworks, which can be most advantageously understood through momentous researches. The sunlight-based photovoltaic, wind turbine, and the related advancements are being updated step by step. Th...
Low charge transfer resistance and high light absorption ability of TiO\(_{2}\)-based photoanodes are the crucial challenges in the field of dye-sensitized solar cells (DSSCs). In this study, nanodiamonds (NDs) have been introduced in TiO\(_{2}\) matrix to investigate their effect on the performance of DSSCs. Colloidal suspension method has been em...
Low electron mobility of TiO2 semi-conductor and inferior inter-particle contact facilitate recombination reactions that leads to low performance of dye sensitized solar cells (DSSCs). To improve electron mobility at relatively low sintering temperatures, doping of germanium (Ge) nanoparticles with TiO2 have been trailed due to its excellent optoel...
Photovoltaic system is widely installed to increase the share of renewable energy as well as to reduce the environmental impact of fossil fuel based energy. Photovoltaic (PV) is one of the most potential renewable energy based power generation systems. Monitoring of PV system is very important to send information that allows owners to maintain, ope...
Solar photovoltaics (PV) is a promising solution to combat against energy crisis and environmental pollution. However, the high manufacturing cost of solar cells along with the huge area required for well-sized PV power plants are the two major issues for the sustainable expansion of this technology. Concentrator technology is one of the solutions...
Irradiation level is the key factor of photovoltaic power generation. Photovoltaic/thermal systems are more effective at concentrating power in areas of high irradiation as compared to traditional PV systems. High irradiation maintains the cell temperature and maximizes electrical-thermal energy. An optimum cooling system is required to remove the...
Recently, the proton exchange membrane fuel cell (PEMFC) has gained much attention to the technology of renewable energy due to its mechanically ideal and zero emission power source. PEMFC performance reflects from the surroundings such as temperature and pressure. This paper presents an analysis of the performance of the PEMFC by developing the ma...
Dye sensitized solar cells (DSSCs) are widely studied for the safe and reliable energy supply. Due to its low fabrication cost, eco-friendly production and competitive efficiency, this is the promising technology. The components of DSSC which combine to form a photo conversion device are the conducting substrate, dye, photoanode, catalyst and elect...
Although sun is the source of all forms of energy including the energy contained in fossil fuels, the term “solar energy” is meant the energy obtained directly from sun’s radiation. Solar photovoltaic (PV) is the most promising of all the active solar energy technologies. This technology is affordable and the source of this energy is inexhaustible....
This study formulates the effects of two different historical data types on electrical energy consumption of ASEAN-5 counties. On this basis, optimized GEP (gene expression programming) is applied to precisely formulate the relationships between historical data and electricity consumption. The optimized GEP is a more recent extension of GEP with hi...
In this study, TiO2photoanode has been modified by incorporating Zinc (Zn) nanoparticles to improve the incident photon conversion efficiency (IPEC) of dye sensitized solar cells (DSSCs). The effect of concentration variation of Zn nanoparticles in conventional photoanode has also been studied. Colloidal suspension method and screen printing techni...
This paper proposes rain-fall optimization algorithm (RFO), a new nature-inspired algorithm based on behavior of raindrops, for solving of real-valued numerical optimization problems. RFO has been developed from a motivation to find a simpler and more effective search algorithm to optimize multi-dimensional numerical test functions. It is effective...
Photovoltaic (PV) modules convert a small portion of solar radiation into electrical energy and convert the rest into heat. As a result, the temperature of these modules is increased and their electrical efficiency is degraded. In this study, the effects of various operating parameters, such as solar cell temperature, irradiation intensity, mass fl...
Microalgae are termed as third generation feedstock due to their enormous capacity to synthesize oil, which is a precursor of biodiesel production. The present study aims to analyze the effect of solvents in solvent extraction method to recover algal oil from Chlorella pyrenoidosa biomass grown on dairy industry wastewater. Bligh and Dyer (BD), Mod...
Considering that renewable energy is the primary energy source in the future, this study investigates biomass power for sustainable and secure energy supply. Biomass fuels in Malaysia include empty fruit bunch, mesocarp fiber, palm kernel shell, oil palm frond, oil palm trunk from palm oil plantation, and woody biomass from forests. The moisture co...
Proton Exchange Membrane Fuel Cell (PEMFC) is one type of the renewable energy that are current increasingly popular in industry. The cost for the implementation of the PEMFC system is quite high in order to use in the experimental research field. Therefore, the simulation modelling is very useful to emulate the PEMFC system in real work. The objec...
Abstract
Solar energy generated by sunlight has a non-schedulable nature due to the stochastic environment of meteorological conditions. Hence, power system control and the energy business require the prediction of solar energy (radiation) from a few seconds up to one week in advance. To deal with prediction shortcomings, various solar radiation p...
Citations
... Using the PVC method, the cost of electricity (COE) per unit in kWh is calculated as in Equation 22 36,37 . ...
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... If this same thing is merged with our model and an application is made then surely the accuracy will be better to diagnose brain tumor. Researches used algorithm for the measurement and analysis in term of laser's performance [49,50]. This technique can however be worked upon in future. ...
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... Flue gas, steam and superheated steam, extraction steam, and solar heating air are common heat sources in convection and conduction drying systems. The most common types of convection dryers are rotary drum dryers, fluidized bed dryers, pneumatic dryers, solar dryers, and agitated drum dryers [13,14]. The performance of fluidized bed dryers is limited by particle size, for the reason that particles larger than 50 mm are difficult to fluidize [15]. ...
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... Hence, many intelligent inverted-based FRT controls are proposed in the literature. Muhammed et al. (Talha et al., 2020) proposed a control strategy by providing reactive power injection during voltage sags. The proposed system consists of decoupled power control, LVRT operation based on inverter specifications, and grid codes. ...
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... Figure 22 shows the schematic block diagram for wireless charging, showing components such as transmitting and receiving coils, and compensators. efficiency and transfer distance [75][76][77][78][79]. Works such as [80,81] have explored concepts and trends relating to the adoption of wireless charging in electric vehicles. In [80], different wireless charger topologies-based on two winding model-are compared, and various compensation techniques validated for enhancement of power transfer capability. ...
... An uncertainty analysis of the PVT and PVT-PCM electrical and thermal parameters is performed. The total uncertainty du of a parameter u is composed of the uncertainty of repetition error (dur) and the uncertainty from equipment error (due) [60,61]. , then the uncertainty of U will be Equation (14): [61,62] (14) where dU is the uncertainty of the function U; dui is the uncertainty of ui and is the partial derivative of U with respect to . ...
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... Assim como em qualquer sistema que precisa de energia para funcionar, a medição da energia consumida é um parâmetro importante para otimizar os processos, visando diminuir custos, que, no caso da energia termossolar, está associado aos gastos com instalação, operação e manutenção (KALOGIROU, 2009). Por outro lado, devido à variação diária do recurso solar, a medida da quantidade de energia entregue pelo sistema termossolar é importante para comparar com as premissas do projeto de engenharia, e, dessa forma, aprimorar os métodos de dimensionamento (GORJIAN, 2020;KUMAR, 2021). O presente projeto tem como objetivo a construção de um dispositivo de baixo custo para o monitoramento remoto de variáveis de sistemas termossolares, tais como temperatura e vazão, para calcular a quantidade de energia gerada. ...
... Improving energy efficiency and reducing carbon emissions is a global topic that has attracted widespread attention from governments or organizations around the world. Buildings are currently the main contributor to energy consumption, accounting for 40-60% of total energy consumption [2,11]. Urban energy management to balance demand and supply is crucial for energy efficiency. ...
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... Following the trend development of power electronics applications such as a smart grid system nuclear power plant, sustainable renewable energy system, efficient power supply, vehicle and transport system, compact and reliable motor drives and actuator [1][2][3][4][5][6][7] , qualified engineers are highly demanded. The qualifications require a comprehensive understanding of both theoretical and practical approaches. ...
... Examples of this are the SeAPF and ShAPF (Sections 6.1 and 6.2), and the UPQC (Section 6.3), which introduce, into the system, compensation currents and/or voltages previously calculated to mitigate power quality problems. Another solution made possible by the evolution of power electronics to reduce harmonic distortion is the use of improved power quality converters [317], which include PFC converters [318]. ...
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