This page has only limited features, please log in for full access.

Dr. Muhammad Tariq Nazir
School of Mechanical and Manufacturing Engineering, University of New South Wales Sydney, NSW 2052, Australia

Basic Info


Research Keywords & Expertise

0 Composites
0 High Voltage
0 Dielectric materials
0 condition monitoring and fault diagnosis
0 electrical discharges

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Communication
Published: 25 August 2021 in Polymers
Reads 0
Downloads 0

Room temperature vulcanized (RTV) silicone rubber filled with aluminum trihydrate (ATH) is substantially engaged in electrical outdoor insulation applications. The pristine silicone rubber is highly combustible. ATH filled silicone rubber offers excellent electrical insulation butlacks in providing adequate flame retardancy. This short communication reports the novel results on improved flame retardancy of pristine and ATH filled silicone rubber whilst retaining the electrical insulation properties to a great extent. Results suggest that the presence of only one percent of graphene nanoplatelets with ATH sharply reduces the heat release rate and rate of smoke release. A minor reduction in dielectric breakdown strength and volume resistivity is noticed. Furthermore, permittivity and dielectric loss at power frequency suggest that a marginal 1% concentration of nanoplatelet with ATH is an excellent approach to fabricate flame retardant silicone rubber with an acceptable electrical insulation level.

ACS Style

Muhammad Tariq Nazir; Arslan Khalid; Imrana Kabir; Cheng Wang; Juan-Carlos Baena; Shakeel Akram; Muhammad Shoaib Bhutta; Ghulam Yasin; Bao Toan Phung; Guan Heng Yeoh. Flame Retardancy and Excellent Electrical Insulation Performance of RTV Silicone Rubber. Polymers 2021, 13, 2854 .

AMA Style

Muhammad Tariq Nazir, Arslan Khalid, Imrana Kabir, Cheng Wang, Juan-Carlos Baena, Shakeel Akram, Muhammad Shoaib Bhutta, Ghulam Yasin, Bao Toan Phung, Guan Heng Yeoh. Flame Retardancy and Excellent Electrical Insulation Performance of RTV Silicone Rubber. Polymers. 2021; 13 (17):2854.

Chicago/Turabian Style

Muhammad Tariq Nazir; Arslan Khalid; Imrana Kabir; Cheng Wang; Juan-Carlos Baena; Shakeel Akram; Muhammad Shoaib Bhutta; Ghulam Yasin; Bao Toan Phung; Guan Heng Yeoh. 2021. "Flame Retardancy and Excellent Electrical Insulation Performance of RTV Silicone Rubber." Polymers 13, no. 17: 2854.

Research article
Published: 13 May 2021 in Complexity
Reads 0
Downloads 0

The hybridization of two or more energy sources into a single power station is one of the widely discussed solutions to address the demand and supply havoc generated by renewable production (wind-solar/photovoltaic (PV), heating power, and cooling power) and its energy storage issues. Hybrid energy sources work based on the complementary existence of renewable sources. The combined cooling, heating, and power (CCHP) is one of the significant systems and shows a profit from its low environmental impact, high energy efficiency, low economic investment, and sustainability in the industry. This paper presents an economic model of a microgrid (MG) system containing the CCHP system and energy storage considering the energy coupling and conversion characteristics, the effective characteristics of each microsource, and energy storage unit is proposed. The random forest regression (RFR) model was optimized by the gravitational search algorithm (GSA). The test results show that the GSA-RFR model improves prediction accuracy and reduces the generalization error. The detail of the MG network and the energy storage architecture connected to the other renewable energy sources is discussed. The mathematical formulation of energy coupling and energy flow of the MG network including wind turbines, photovoltaic (PV), CCHP system, fuel cell, and energy storage devices (batteries, cold storage, hot water tanks, and so on) are presented. The testing system has been analysed under load peak cutting and valley filling of energy utilization index, energy utilization rate, the heat pump, the natural gas consumption of the microgas turbine, and the energy storage unit. The energy efficiency costs were observed as 88.2% and 86.9% with heat pump and energy storage operation comparing with GSA-RFR-based operation costs as 93.2% and 93% in summer and winter season, respectively. The simulation results extended the rationality and economy of the proposed model.

ACS Style

Muhammad Shahzad Nazir; Sami Ud Din; Wahab Ali Shah; Majid Ali; Ali Yousaf Kharal; Ahmad N. Abdalla; Padmanaban Sanjeevikumar. Optimal Economic Modelling of Hybrid Combined Cooling, Heating, and Energy Storage System Based on Gravitational Search Algorithm-Random Forest Regression. Complexity 2021, 2021, 1 -13.

AMA Style

Muhammad Shahzad Nazir, Sami Ud Din, Wahab Ali Shah, Majid Ali, Ali Yousaf Kharal, Ahmad N. Abdalla, Padmanaban Sanjeevikumar. Optimal Economic Modelling of Hybrid Combined Cooling, Heating, and Energy Storage System Based on Gravitational Search Algorithm-Random Forest Regression. Complexity. 2021; 2021 ():1-13.

Chicago/Turabian Style

Muhammad Shahzad Nazir; Sami Ud Din; Wahab Ali Shah; Majid Ali; Ali Yousaf Kharal; Ahmad N. Abdalla; Padmanaban Sanjeevikumar. 2021. "Optimal Economic Modelling of Hybrid Combined Cooling, Heating, and Energy Storage System Based on Gravitational Search Algorithm-Random Forest Regression." Complexity 2021, no. : 1-13.

Journal article
Published: 06 March 2021 in Coatings
Reads 0
Downloads 0

This paper presents a novel thermopile chip in which the resonant cavity structure was fully utilized as an absorber by an optical design. The resonant cavity absorber structure was designed using Al as anthe bottom reflective metal layer, air as the intermediate dielectric layer, and SiO2/TiN/Si3N4 sandwich layers as the top absorption layer, while the bottom reflective metal (Al) was deposited on the cold junctions of the thermopile. The simulation and calculation results show that the thermopile chip with resonant cavity absorber structure not only has great infrared absorption in the wide infrared absorption range but also can effectively prevent the cold junctions from absorbing infrared radiation and inhibit the rise of temperature. As a result, the temperature difference between the hot junctions and the cold junctions is increased, and the responsivity of the thermopile chip is further improved. Moreover, the duty cycle of the thermopile chip is greatly improved due to the double-layer suspension structure. Compared with the traditional thermopile chip structure, the sizes of the thermopile chip with the resonant cavity absorber structure can be further reduced while maintaining responsivity and specific detectivity.

ACS Style

Haigang Hou; Jian Yang; Guiwu Liu; Junlin Liu; Mudassar Abbas; Shahid Hussain; Haicheng Shao; Guanjun Qiao; Ayman Ghfar; Mohamed Ouladsmane; Muhammad Nazir; Murefah Al-Anazy. Designing Optically & Utilization of Thermopile Chip with Resonant Cavity Absorber Structure as IR Absorber. Coatings 2021, 11, 302 .

AMA Style

Haigang Hou, Jian Yang, Guiwu Liu, Junlin Liu, Mudassar Abbas, Shahid Hussain, Haicheng Shao, Guanjun Qiao, Ayman Ghfar, Mohamed Ouladsmane, Muhammad Nazir, Murefah Al-Anazy. Designing Optically & Utilization of Thermopile Chip with Resonant Cavity Absorber Structure as IR Absorber. Coatings. 2021; 11 (3):302.

Chicago/Turabian Style

Haigang Hou; Jian Yang; Guiwu Liu; Junlin Liu; Mudassar Abbas; Shahid Hussain; Haicheng Shao; Guanjun Qiao; Ayman Ghfar; Mohamed Ouladsmane; Muhammad Nazir; Murefah Al-Anazy. 2021. "Designing Optically & Utilization of Thermopile Chip with Resonant Cavity Absorber Structure as IR Absorber." Coatings 11, no. 3: 302.

Review
Published: 26 February 2021 in Sustainable Energy Technologies and Assessments
Reads 0
Downloads 0

Absorber tube in parabolic trough concentrating systems is located at the location of the focal line and a fluid passes through it, the temperature of which increases due to receiving heat from sunlight. The more heat the fluid can absorb from the concentrated solar energy, the better the performance of the system. Since turbulators can be used in the absorber tube for this purpose, a lot of experimental and numerical research have been done on the performance of parabolic trough collectors equipped with various turbulators. In this study, the most important findings of these studies are presented and then, Nusselt number ratio, mean friction factor ratio, and thermal–hydraulic performance evaluation criterion are used to compare the hydrothermal performance of the systems. After reviewing previous researches and identifying advantages and disadvantages of each turbulator, a novel parabolic trough collector equipped with a turbulator is introduced and its hydrothermal performance is evaluated through simulation. The outcomes revealed that the ribbed absorber tube and the concentric rod insert are the most optimum turbulators. In addition, the parabolic trough collector equipped with a combination of corrugated channel and obstacle has a much better hydrothermal performance than the collectors using each of these turbulators separately.

ACS Style

Muhammad Shahzad Nazir; Amin Shahsavar; Masoud Afrand; Müslüm Arıcı; Sandro Nižetić; Zhenjun Ma; Hakan F. Öztop. A comprehensive review of parabolic trough solar collectors equipped with turbulators and numerical evaluation of hydrothermal performance of a novel model. Sustainable Energy Technologies and Assessments 2021, 45, 101103 .

AMA Style

Muhammad Shahzad Nazir, Amin Shahsavar, Masoud Afrand, Müslüm Arıcı, Sandro Nižetić, Zhenjun Ma, Hakan F. Öztop. A comprehensive review of parabolic trough solar collectors equipped with turbulators and numerical evaluation of hydrothermal performance of a novel model. Sustainable Energy Technologies and Assessments. 2021; 45 ():101103.

Chicago/Turabian Style

Muhammad Shahzad Nazir; Amin Shahsavar; Masoud Afrand; Müslüm Arıcı; Sandro Nižetić; Zhenjun Ma; Hakan F. Öztop. 2021. "A comprehensive review of parabolic trough solar collectors equipped with turbulators and numerical evaluation of hydrothermal performance of a novel model." Sustainable Energy Technologies and Assessments 45, no. : 101103.

Article
Published: 25 February 2021 in Journal of Thermal Analysis and Calorimetry
Reads 0
Downloads 0

The aim of this work is the energy analysis of a novel semicircle-shaped parabolic trough solar collector filled with the water–boehmite alumina (ALOOH) nanofluid. The impacts of Reynolds numbers and nanoparticle volume fraction (φ) on the performance metrics are examined. It was observed that the usage of flow passage above the channel also operates as a turbulator and results in more heat transfer and pressure drop because of more local vortexes. The energy efficacy always increases with an increase in the absorber channel diameter. Higher absorber diameters result in a larger heat transfer surface and can improve the energy efficacy. Therefore, there are an optimum Re number and an optimal channel diameter, which result in the maximum energy efficacy. The channel with a diameter of D = 110 mm has the highest energy efficacy among all the studied cases, followed by configurations with D = 105, 100, 95 and 90 mm, respectively.

ACS Style

Muhammad Shahzad Nazir; Ali Ghasemi; Amin Dezfulizadeh; Ahmad N. Abdalla. Numerical simulation of the performance of a novel parabolic solar receiver filled with nanofluid. Journal of Thermal Analysis and Calorimetry 2021, 1 -12.

AMA Style

Muhammad Shahzad Nazir, Ali Ghasemi, Amin Dezfulizadeh, Ahmad N. Abdalla. Numerical simulation of the performance of a novel parabolic solar receiver filled with nanofluid. Journal of Thermal Analysis and Calorimetry. 2021; ():1-12.

Chicago/Turabian Style

Muhammad Shahzad Nazir; Ali Ghasemi; Amin Dezfulizadeh; Ahmad N. Abdalla. 2021. "Numerical simulation of the performance of a novel parabolic solar receiver filled with nanofluid." Journal of Thermal Analysis and Calorimetry , no. : 1-12.

Journal article
Published: 21 February 2021 in Polymers
Reads 0
Downloads 0

The steady-state electrical conduction current for single and multilayer polyimide (PI) nanocomposite films was observed at the low and high electric field for different temperatures. Experimental data were fitted to conduction models to investigate the dominant conduction mechanism in these films. In most films, space charge limited current (SCLC) and Poole–Frenkel current displayed dominant conduction. At a high electric field, the ohmic conduction was replaced by current–voltage dependency. Higher conduction current was observed for nanocomposite films at a lower temperature, but it declined at a higher temperature. PI nanocomposite multilayer films showed a huge reduction in the conduction current at higher electric fields and temperatures. The conclusions derived in this study would provide the empirical basis and early breakdown phenomenon explanation when performing dielectric strength and partial discharge measurements of PI-based nanocomposite insulation systems of electric motors.

ACS Style

Muhammad Bhutta; Shakeel Akram; Pengfei Meng; Jerome Castellon; Serge Agnel; Hui Li; Yecai Guo; Ghulam Rasool; Shahid Hussain; Muhammad Nazir. Steady-State Conduction Current Performance for Multilayer Polyimide/SiO2 Films. Polymers 2021, 13, 640 .

AMA Style

Muhammad Bhutta, Shakeel Akram, Pengfei Meng, Jerome Castellon, Serge Agnel, Hui Li, Yecai Guo, Ghulam Rasool, Shahid Hussain, Muhammad Nazir. Steady-State Conduction Current Performance for Multilayer Polyimide/SiO2 Films. Polymers. 2021; 13 (4):640.

Chicago/Turabian Style

Muhammad Bhutta; Shakeel Akram; Pengfei Meng; Jerome Castellon; Serge Agnel; Hui Li; Yecai Guo; Ghulam Rasool; Shahid Hussain; Muhammad Nazir. 2021. "Steady-State Conduction Current Performance for Multilayer Polyimide/SiO2 Films." Polymers 13, no. 4: 640.

Journal article
Published: 11 January 2021 in Engineering Failure Analysis
Reads 0
Downloads 0

Room temperature vulcanized silicone rubber (RTV-SiR) materials are broadly employed for high voltage outdoor insulation applications. Like other polymeric materials, such insulators degrade due to the multiple stresses caused by the environment. Therefore, for the investigation of multiple stresses presented in the environment such as UV radiations, salt fog, acid rain, heat, humidity, etc., a neat SiR, two aluminum trihydrate (ATH) filled composites of SiR (SMC1 and SMC2), one silica filled composite SiR (SMC3), and a co-filled composite (SMNC) having ATH and silica as fillers are fabricated and tested for 9000 h. After aging, the sample SMC3 and neat SiR show better hydrophobic behavior than the other samples. All the samples offer better leakage current suppression throughout aging. Dielectric breakdown strength (DBS) of SMC2 and SMC1 is measured better than their counterparts. Volume and surface resistivities of SMC1 remain the highest followed by SMC2 and SMC3. Scanning electron microscopy (SEM) results suggest that the surface of SMC2 retains excellent surface condition followed by neat SiR. SMC1, SMC2, and SMNC absorb higher water relatively after 24 h of immersion test whilst SMC1 and SMC3 exhibit a similar tendency after 2-h boiling test.

ACS Style

Hidayatullah Khan; Atif Mahmood; Israr Ullah; Muhammad Amin; M. Tariq Nazir. Hydrophobic, dielectric and water immersion performance of 9000 h multi-stresses aged silicone rubber composites for high voltage outdoor insulation. Engineering Failure Analysis 2021, 122, 105223 .

AMA Style

Hidayatullah Khan, Atif Mahmood, Israr Ullah, Muhammad Amin, M. Tariq Nazir. Hydrophobic, dielectric and water immersion performance of 9000 h multi-stresses aged silicone rubber composites for high voltage outdoor insulation. Engineering Failure Analysis. 2021; 122 ():105223.

Chicago/Turabian Style

Hidayatullah Khan; Atif Mahmood; Israr Ullah; Muhammad Amin; M. Tariq Nazir. 2021. "Hydrophobic, dielectric and water immersion performance of 9000 h multi-stresses aged silicone rubber composites for high voltage outdoor insulation." Engineering Failure Analysis 122, no. : 105223.

Journal article
Published: 23 October 2020 in IEEE Access
Reads 0
Downloads 0

The partial discharge (PD) in inverter-fed motors generated from high frequency and short rise time impulsive voltage are more complex than traditional sinusoidal voltage operated motors due to the noise initiated from fast switching power electronics devices. Available PD sensors and related technology for DC and sinusoidal voltage cannot be used at repetitive impulsive voltage conditions. This work aims to report the design of antenna with optimized geometry and satisfied parameters to detect PD for impulsive voltage. The antenna is verified and the influence of both impulse voltage parameters and test configuration on PD features are discussed. The envelope detection technique after the filter in the frequency domain was proposed to reduce the complexity and cost of PD test hardware under impulsive voltages with fast rise times. The frequency domain energy of PD from motor insulation is mainly distributed in the range of 0.6-1.8 GHz. By increasing the amplitude and frequency of input impulsive voltage, the range of PD energy spectrum is enlarged to (1.5-1.8 GHz) and by decreasing input amplitude the PD signal strength decays abruptly. Moreover, the high-frequency distribution of PD energy attenuates more severely with the distance and the electromagnetic energy of PD decays nonlinearly with the increase of propagation distance. Therefore, under the premise of satisfying the safety test, selecting the test distance below 15 cm can ensure that the test results have a high signal-to-noise ratio and signal integrity. The experience reported in this study could provide suggestions for off-line PD measurements for inverter-fed motor insulation evaluations for manufacturers.

ACS Style

Peng Wang; Ma Shijin; Shakeel Akram; Kai Zhou; Yidong Chen; Muhammad Tariq Nazir. Design of Archimedes Spiral Antenna to Optimize for Partial Discharge Detection of Inverter Fed Motor Insulation. IEEE Access 2020, 8, 1 -1.

AMA Style

Peng Wang, Ma Shijin, Shakeel Akram, Kai Zhou, Yidong Chen, Muhammad Tariq Nazir. Design of Archimedes Spiral Antenna to Optimize for Partial Discharge Detection of Inverter Fed Motor Insulation. IEEE Access. 2020; 8 ():1-1.

Chicago/Turabian Style

Peng Wang; Ma Shijin; Shakeel Akram; Kai Zhou; Yidong Chen; Muhammad Tariq Nazir. 2020. "Design of Archimedes Spiral Antenna to Optimize for Partial Discharge Detection of Inverter Fed Motor Insulation." IEEE Access 8, no. : 1-1.

Composites and nanocomposites
Published: 12 October 2020 in Journal of Materials Science
Reads 0
Downloads 0

The flame-retardant properties of polydimethylsiloxane (PDMS)/oxidised multi-walled carbon nanotubes (MWCNT–COOH) nanocomposite films were dispersed using a nonionic acrylate copolymer surfactant. The nanocomposite films were prepared by spin coating and characterised using SEM, quasi-elastic cold-neutron scattering, TGA–FTIR, cone calorimetry, and LOI. The PDMS/surfactant/MWCNT–COOH (PSM) nanocomposite displayed superior flame-retardant performance compared to materials containing only surfactant or MWCNT–COOH. The peak heat release rate, the peak smoke production rate, total smoke release rate, carbon monoxide, and carbon dioxide production from PSM were 42, 47, 18, 28, and 47% less than the PDMS control. The LOI results for PSM exhibited a value of 32% with respect to 25% for the PDMS. PSM suppresses the smoke emission and inhibits penetration of the air reacting with the gas volatiles of the material. These new nanocomposites provide a valuable improvement in flame-retardant capabilities by physical barrier effect compared to other PDMS polymer materials.

ACS Style

Imrana I. Kabir; Yifeng Fu; Nicolas de Souza; Muhammad Tariq Nazir; Juan Carlos Baena; Anthony Chun Yin Yuen; Guan Heng Yeoh. Improved flame-retardant properties of polydimethylsiloxane/multi-walled carbon nanotube nanocomposites. Journal of Materials Science 2020, 56, 2192 -2211.

AMA Style

Imrana I. Kabir, Yifeng Fu, Nicolas de Souza, Muhammad Tariq Nazir, Juan Carlos Baena, Anthony Chun Yin Yuen, Guan Heng Yeoh. Improved flame-retardant properties of polydimethylsiloxane/multi-walled carbon nanotube nanocomposites. Journal of Materials Science. 2020; 56 (3):2192-2211.

Chicago/Turabian Style

Imrana I. Kabir; Yifeng Fu; Nicolas de Souza; Muhammad Tariq Nazir; Juan Carlos Baena; Anthony Chun Yin Yuen; Guan Heng Yeoh. 2020. "Improved flame-retardant properties of polydimethylsiloxane/multi-walled carbon nanotube nanocomposites." Journal of Materials Science 56, no. 3: 2192-2211.

Research article
Published: 30 September 2020 in Energy Exploration & Exploitation
Reads 0
Downloads 0

Generating systems are known as adequately reliable when satisfying the load demand. Meanwhile, the efficiency of electrical systems is currently being more influenced by the growing adoption of the Wind/Solar energy in power systems compared to other conventional power sources. This paper proposed a new optimization approach called Metaheuristic Scanning Genetic Algorithm (MSGA) for the evaluation of the efficiency of power generating systems. The MSGA is based on a combination of metaheuristic scanning and Genetic Algorithm. The MSGA technique is used for evaluating the reliability and adequacy of generation systems integrated with wind/Solar energy is developed. The usefulness of the proposed algorithm was tested using Reliability Test System ‘IEEE-RTS-79’ which include both of wind power and solar power generation. The result approve the effectiveness of the proposed algorithm in improving the computation time by 85% and 2% in comparison with the particle swarm optimization (PSO) and differential evolution optimization algorithm (DEOA) respectively. In addition, the proposed model can be used to test the power capacity forecasting scheme of the hybrid power generation system with the wind, solar and storage.

ACS Style

Ahmed N Abdalla; Muhammad Shahzad Nazir; Mingxin Jiang; Athraa Ali Kadhem; Noor Izzri Abdul Wahab; Suqun Cao; Rendong Ji. Metaheuristic searching genetic algorithm based reliability assessment of hybrid power generation system. Energy Exploration & Exploitation 2020, 39, 488 -501.

AMA Style

Ahmed N Abdalla, Muhammad Shahzad Nazir, Mingxin Jiang, Athraa Ali Kadhem, Noor Izzri Abdul Wahab, Suqun Cao, Rendong Ji. Metaheuristic searching genetic algorithm based reliability assessment of hybrid power generation system. Energy Exploration & Exploitation. 2020; 39 (1):488-501.

Chicago/Turabian Style

Ahmed N Abdalla; Muhammad Shahzad Nazir; Mingxin Jiang; Athraa Ali Kadhem; Noor Izzri Abdul Wahab; Suqun Cao; Rendong Ji. 2020. "Metaheuristic searching genetic algorithm based reliability assessment of hybrid power generation system." Energy Exploration & Exploitation 39, no. 1: 488-501.

Journal article
Published: 27 September 2020 in Polymers
Reads 0
Downloads 0

The application of wide band-gap power electronic devices brings more challenges to insulating packaging technology. Knowing the influence of applied voltage parameters on insulation performance is helpful to evaluate the insulation condition of electric power equipment. In this paper, the effect of repetitive square wave voltage duty cycle on the growth characteristics of electrical trees in epoxy resin was studied. The experimental results show that the square wave voltage duty cycle has a significant influence on treeing features. The electrical tree proportion initiation has shown a decreasing trend, and the shape of the electrical tree changes from pine-like to branch-like by increasing the duty cycles. The length and damaged area of electrical tree increased with the increase in the duty cycle up to 10% and then decrease by increasing the duty cycle higher than 30%. It indicates that a low duty cycle will enhance the electron injection and accumulate space charges and thus accelerate electrical tree development. Under short duty cycles, the electric field due to the shielding effect near the needle tip suppresses the electrical tree growth, which results in treeing growth stagnation. The obtained results are helpful to keep these parameters in mind during the design of epoxy-based insulation such high-voltage rotating machines and power electronic device packaging.

ACS Style

Peng Wang; Suxin Hui; Shakeel Akram; Kai Zhou; Muhammad Tariq Nazir; Yiwen Chen; Han Dong; Muhammad Sufyan Javed; Inzamam Ul Haq. Influence of Repetitive Square Voltage Duty Cycle on the Electrical Tree Characteristics of Epoxy Resin. Polymers 2020, 12, 2215 .

AMA Style

Peng Wang, Suxin Hui, Shakeel Akram, Kai Zhou, Muhammad Tariq Nazir, Yiwen Chen, Han Dong, Muhammad Sufyan Javed, Inzamam Ul Haq. Influence of Repetitive Square Voltage Duty Cycle on the Electrical Tree Characteristics of Epoxy Resin. Polymers. 2020; 12 (10):2215.

Chicago/Turabian Style

Peng Wang; Suxin Hui; Shakeel Akram; Kai Zhou; Muhammad Tariq Nazir; Yiwen Chen; Han Dong; Muhammad Sufyan Javed; Inzamam Ul Haq. 2020. "Influence of Repetitive Square Voltage Duty Cycle on the Electrical Tree Characteristics of Epoxy Resin." Polymers 12, no. 10: 2215.

Journal article
Published: 27 September 2020 in Energies
Reads 0
Downloads 0

The main purpose of this paper is to enhance the operation of renewable wind energy conversion (WEC) systems connected to power systems. To achieve this, we consider a linear quadratic Gaussian (LQG) control approach for regulating the effects of a WEC system with doubly fed induction generator (DFIG) on the synchronous generator (SG) rotor speed of the interconnected power system. First, we present the mathematical formulation of the interconnected power system comprises a single synchronous generator and a wind turbine with DFIG connected to an infinite bus bar system through a transmission line. We consider that the system is operated under various loading conditions and parameters variation. Second, a frequency damping oscillation observer is designed via Kalman filtering together with an optimal linear quadratic regulator to mitigate the impacts of the WEC system on the SG rotor speed. The performance of the developed interconnected power system is simulated using a MATLAB/SIMULINK environment to verify the effectiveness of the developed controller. In comparison with previously reported results, the proposed approach can stabilize the interconnected power system within 1.28 s compared to 1.3 s without the DFIG.

ACS Style

Farag K. Abo-Elyousr; Hossam S. Abbas; Ali M. Yousef; Nguyen Vu Quynh; Ziad M. Ali; Muhammad Shahzad Nazir. Oscillation Damping for Wind Energy Conversion System with Doubly Fed Induction Generator Association with Synchronous Generator. Energies 2020, 13, 5067 .

AMA Style

Farag K. Abo-Elyousr, Hossam S. Abbas, Ali M. Yousef, Nguyen Vu Quynh, Ziad M. Ali, Muhammad Shahzad Nazir. Oscillation Damping for Wind Energy Conversion System with Doubly Fed Induction Generator Association with Synchronous Generator. Energies. 2020; 13 (19):5067.

Chicago/Turabian Style

Farag K. Abo-Elyousr; Hossam S. Abbas; Ali M. Yousef; Nguyen Vu Quynh; Ziad M. Ali; Muhammad Shahzad Nazir. 2020. "Oscillation Damping for Wind Energy Conversion System with Doubly Fed Induction Generator Association with Synchronous Generator." Energies 13, no. 19: 5067.

Journal article
Published: 12 September 2020 in Journal of Energy Storage
Reads 0
Downloads 0

Reasonable energy storage capacity in a high source-to-charge ratio local power grid can not only reduce system costs but also improve local power supply reliability. This paper introduces the capacity sizing of energy storage system based on reliable output power. The proposed model is formulated to determine the relationship between the power capacity and wind energy loss, considering the wind curtailment loss and traditional energy power uncertain reserve. The non-parametric kernel density estimation is adopted to estimate the confidence intervals of wind power prediction error and fluctuation ranges of the actual output of a wind farm under different confidence degrees. The actual historical data of scenery resources in a certain area is used to verify the feasibility of the proposed method. The simulation shows the large-capacity energy storage, the reliable output power of the microgrid wind ensures the feasibility of day-ahead generation plans.

ACS Style

Muhammad Shahzad Nazir; Ahmad N. Abdalla; Yeqin Wang; Zhang Chu; Ji Jie; Peng Tian; Mingxin Jiang; Irfan Khan; P. Sanjeevikumar; Yongfeng Tang. Optimization configuration of energy storage capacity based on the microgrid reliable output power. Journal of Energy Storage 2020, 32, 101866 .

AMA Style

Muhammad Shahzad Nazir, Ahmad N. Abdalla, Yeqin Wang, Zhang Chu, Ji Jie, Peng Tian, Mingxin Jiang, Irfan Khan, P. Sanjeevikumar, Yongfeng Tang. Optimization configuration of energy storage capacity based on the microgrid reliable output power. Journal of Energy Storage. 2020; 32 ():101866.

Chicago/Turabian Style

Muhammad Shahzad Nazir; Ahmad N. Abdalla; Yeqin Wang; Zhang Chu; Ji Jie; Peng Tian; Mingxin Jiang; Irfan Khan; P. Sanjeevikumar; Yongfeng Tang. 2020. "Optimization configuration of energy storage capacity based on the microgrid reliable output power." Journal of Energy Storage 32, no. : 101866.

Article
Published: 20 August 2020 in Bulletin of Materials Science
Reads 0
Downloads 0

Silicone rubber filled with micron-alumina trihydrate (ATH) is a substantially used composite material for high voltage outdoor insulators. This article investigates the effect of nano-boron nitride (BN) addition on the dielectric, thermal stability and thermal conductivity of solely micron-ATH-filled silicone rubber by fabricating coalesced network of particles. Micron-ATH/nano-BN-filled hybrid silicone rubber composites are fabricated with a ratio of 30/0 wt% (ATH30), 29/1 wt% (ATBN1), 27/3 wt% (ATBN3), 25/5 wt% (ATBN5) and 23/7 wt% (ATBN7) using mechanical mixing and water bath sonication techniques. Results suggest that the hybrid batch of silicone rubber composites (ATBN) possess lower permittivity, dielectric loss, enhanced thermal stability and thermal conductivity relative to ATH30. ATBN1 offers low permittivity and dielectric loss values of 3.64 and 0.0086 at 1000 Hz relative to 3.87 and 0.0224 of ATH30, respectively. As far as thermal properties are concerned, ATBN5 emerges as the most promising candidate for electrical insulation with 31 and 200°C higher temperatures for 10 and 15% mass loss, whilst it has shown 20% higher thermal conductivity than ATH30.

ACS Style

M Tariq Nazir; B Toan Phung; Guan H Yeoh; Ghulam Yasin; Shakeel Akram; M Shoaib Bhutta; M Ali Mehmood; Shahid Hussain; Shihu Yu; Imrana Kabir. Enhanced dielectric and thermal performance by fabricating coalesced network of alumina trihydrate/boron nitride in silicone rubber for electrical insulation. Bulletin of Materials Science 2020, 43, 1 -5.

AMA Style

M Tariq Nazir, B Toan Phung, Guan H Yeoh, Ghulam Yasin, Shakeel Akram, M Shoaib Bhutta, M Ali Mehmood, Shahid Hussain, Shihu Yu, Imrana Kabir. Enhanced dielectric and thermal performance by fabricating coalesced network of alumina trihydrate/boron nitride in silicone rubber for electrical insulation. Bulletin of Materials Science. 2020; 43 (1):1-5.

Chicago/Turabian Style

M Tariq Nazir; B Toan Phung; Guan H Yeoh; Ghulam Yasin; Shakeel Akram; M Shoaib Bhutta; M Ali Mehmood; Shahid Hussain; Shihu Yu; Imrana Kabir. 2020. "Enhanced dielectric and thermal performance by fabricating coalesced network of alumina trihydrate/boron nitride in silicone rubber for electrical insulation." Bulletin of Materials Science 43, no. 1: 1-5.

Article
Published: 15 August 2020 in Journal of Polymer Science
Reads 0
Downloads 0

The preparation of polyimide (PI)/nanocomposite films and their thickness are a complex process with some ambiguous variables that are involved in the synthesis process. Therefore, it is crucial to understand those variables and reveal the chemistry behind them. Several methods have been probed until an optimal synthesis process was found. A detailed synthesis process optimization is described in this article to understand all variables, which can influence the molecular weight of polyamic acide (PAA) solution, the thickness of films, and nanoparticles dispersion. The spin coating technique was used to control the thickness of single and multilayer PI/nanocomposite films, which reveals that the thickness of the casted PI film depends on several factors, such as the viscosity, molecular weight of the PAA solution, and the spin speed of spin coater. Factors, which can influence the molecular weight of PAA solution, are discussed in detail. After completing the synthesis process, the single and multilayer PI nanocomposite films are characterized experimentally. The results reveal that using a thin layer of nanocomposite on PI film in the form of a multilayer structure improves the nanoparticles dispersion and thereafter its dielectric properties.

ACS Style

Shakeel Akram; Jérôme Castellon; Serge Agnel; Kai Zhou; Jean‐Pierre Habas; Muhammad Tariq Nazir. Multilayer polyimide nanocomposite films synthesis process optimization impact on nanoparticles dispersion and their dielectric performance. Journal of Polymer Science 2020, 138, 1 .

AMA Style

Shakeel Akram, Jérôme Castellon, Serge Agnel, Kai Zhou, Jean‐Pierre Habas, Muhammad Tariq Nazir. Multilayer polyimide nanocomposite films synthesis process optimization impact on nanoparticles dispersion and their dielectric performance. Journal of Polymer Science. 2020; 138 (4):1.

Chicago/Turabian Style

Shakeel Akram; Jérôme Castellon; Serge Agnel; Kai Zhou; Jean‐Pierre Habas; Muhammad Tariq Nazir. 2020. "Multilayer polyimide nanocomposite films synthesis process optimization impact on nanoparticles dispersion and their dielectric performance." Journal of Polymer Science 138, no. 4: 1.

Short communication
Published: 08 August 2020 in Inorganic Chemistry Communications
Reads 0
Downloads 0

The lethargic kinetics of oxygen reduction reaction (ORR) at cathode typically desires to be catalyzed by highly competent catalysts to get better performance of fuel cell devices for efficient energy conversion. Herein, we fabricated a nanocomposite of multiwall carbon nanotubes decorated with iron phthalocyanine nanoparticles ([email protected]) using a single-step facile microwave strategy. The morphologies and composition of the FePcNPs and [email protected] were confirmed by using multiple analytical techniques. Further, these materials were taken under the ORR electrocatalytic investigations in O2-saturated 0.1 M KOH. The results demonstrated the composite [email protected] to have superior ORR activity as evidenced by the significant reduction in over-potential (onset potential, +1.03 V and half-wave potential, +0.97 V) in comparison to commercial FePc and 20% Pt/C. In addition, the electrochemistry of FePcNPs, [email protected] in N2-saturated 0.1 M KOH indicated that more positive formal potential of Fe2+/Fe3+ redox couple facilitated the strong interaction between Fe2+ and O2; weaken the OO bond followed by 4e− ORR. This work confirms that bio-inspired molecules at the nanoscale can be applied to achieve 4e− ORR.

ACS Style

Anuj Kumar; Ghulam Yasin; Rashid Mustafa Korai; Y. Slimani; Muhammad Furqan Ali; Mohammad Tabish; Muhammad Tariq Nazir; Tuan Anh Nguyen. Boosting oxygen reduction reaction activity by incorporating the iron phthalocyanine nanoparticles on carbon nanotubes network. Inorganic Chemistry Communications 2020, 120, 108160 .

AMA Style

Anuj Kumar, Ghulam Yasin, Rashid Mustafa Korai, Y. Slimani, Muhammad Furqan Ali, Mohammad Tabish, Muhammad Tariq Nazir, Tuan Anh Nguyen. Boosting oxygen reduction reaction activity by incorporating the iron phthalocyanine nanoparticles on carbon nanotubes network. Inorganic Chemistry Communications. 2020; 120 ():108160.

Chicago/Turabian Style

Anuj Kumar; Ghulam Yasin; Rashid Mustafa Korai; Y. Slimani; Muhammad Furqan Ali; Mohammad Tabish; Muhammad Tariq Nazir; Tuan Anh Nguyen. 2020. "Boosting oxygen reduction reaction activity by incorporating the iron phthalocyanine nanoparticles on carbon nanotubes network." Inorganic Chemistry Communications 120, no. : 108160.

Review
Published: 07 August 2020 in Polymer Reviews
Reads 0
Downloads 0

Increasing demands in minimization of fire risks and meeting fire safety requirements by polymers require advances in knowledge of flame-retardant materials suitable for use in fire-retardancy applications. The present work represents the seminal review of alginate/polymer-based materials as flame retardants. Alginates are suitable for this application as they represent alternatives to petroleum-based polymer feedstocks. The content of the present work is structured into four sections: synthesis and structure, including alginate synthesis and modification by polymeric conjugation; properties, including four-stage mechanism of thermal degradation; applications, including commercial information on alginates and polymers; and flame retardancy, including comprehensive summaries of test methods and published data, discussion of key parameters, eight fire retardancy mechanisms, four char generation mechanisms, and extensive quantitative analysis of polymer char formation. The final section culminates in a first-principles approach to the prediction of quantitative polymer char formation. The goal of the review is to provide guidance for the application of alginates and alginates conjugated with fire-retardant polymers as a new generation flame retardant material.

ACS Style

Imrana I. Kabir; Charles C. Sorrell; Sajjad S. Mofarah; Wei Yang; Anthony Chun Yin Yuen; Muhammad Tariq Nazir; Guan Heng Yeoh. Alginate/Polymer-Based Materials for Fire Retardancy: Synthesis, Structure, Properties, and Applications. Polymer Reviews 2020, 61, 357 -414.

AMA Style

Imrana I. Kabir, Charles C. Sorrell, Sajjad S. Mofarah, Wei Yang, Anthony Chun Yin Yuen, Muhammad Tariq Nazir, Guan Heng Yeoh. Alginate/Polymer-Based Materials for Fire Retardancy: Synthesis, Structure, Properties, and Applications. Polymer Reviews. 2020; 61 (2):357-414.

Chicago/Turabian Style

Imrana I. Kabir; Charles C. Sorrell; Sajjad S. Mofarah; Wei Yang; Anthony Chun Yin Yuen; Muhammad Tariq Nazir; Guan Heng Yeoh. 2020. "Alginate/Polymer-Based Materials for Fire Retardancy: Synthesis, Structure, Properties, and Applications." Polymer Reviews 61, no. 2: 357-414.

Research article
Published: 06 August 2020 in ACS Sustainable Chemistry & Engineering
Reads 0
Downloads 0

Rechargeable aqueous zinc-iodine (Zn-I2) battery has emerged as a promising electrochemical energy storage technology. However, poor cycling stability caused by the dissolution of iodine species into the electrolyte limited its practical application. Herein, we report a nitrogen-doped porous carbon (NPC) material in gram scales. Performed as iodine host in Zn-I2 battery, the NPC shows a high specific capacity (345.3 mAh g−1 at 0.2 C), superior rate capability (capacity retention at 10 C), and remarkable cycling stability (10000 cycles at 10 C with a capacity retention of 80.9%). More importantly, DFT computations reveal that the Graphitic-N (N-Q) exhibits the strongest adsorption of iodine, however, pyridinic-N (N-6) shows the weakest adsorption of iodine. Moreover, the N-6/N-Q ratio is an essential parameter that significantly determined the electrochemical performance of Zn-I2 batteries. Therefore, the improved long-term cycling stability and rate capability of the as-designed Zn-I2 battery are attributable to the decrease of the N-6/N-Q ratio. This work is of great significance for devolving highly reversible zinc-batteries.

ACS Style

Donglin Yu; Anuj Kumar; Tuan Anh Nguyen; Muhammad Tariq Nazir; Ghulam Yasin. High-Voltage and Ultrastable Aqueous Zinc–Iodine Battery Enabled by N-Doped Carbon Materials: Revealing the Contributions of Nitrogen Configurations. ACS Sustainable Chemistry & Engineering 2020, 8, 1 .

AMA Style

Donglin Yu, Anuj Kumar, Tuan Anh Nguyen, Muhammad Tariq Nazir, Ghulam Yasin. High-Voltage and Ultrastable Aqueous Zinc–Iodine Battery Enabled by N-Doped Carbon Materials: Revealing the Contributions of Nitrogen Configurations. ACS Sustainable Chemistry & Engineering. 2020; 8 (36):1.

Chicago/Turabian Style

Donglin Yu; Anuj Kumar; Tuan Anh Nguyen; Muhammad Tariq Nazir; Ghulam Yasin. 2020. "High-Voltage and Ultrastable Aqueous Zinc–Iodine Battery Enabled by N-Doped Carbon Materials: Revealing the Contributions of Nitrogen Configurations." ACS Sustainable Chemistry & Engineering 8, no. 36: 1.

Journal article
Published: 05 August 2020 in IEEE Transactions on Dielectrics and Electrical Insulation
Reads 0
Downloads 0

In this study, XLPE electrical breakdown depending on insulation thickness is analyzed by simulations and experiments. The bipolar space charge and molecular chain displacement models are investigated to explain the experimental results. The results from experiments indicate that the electrical DC breakdown field decreases with increasing insulation thickness. For simulations, carrier mobility and trapping parameters are obtained from experiments. The simulation results of both models present an inverse power relationship between the DC breakdown strength and insulation thickness. The simulation results of molecular chain mobility model show consistency with experimental results as compared to a bipolar space charge model. The movement of polymer chain containing deep traps expands the free volume and this enlargement in free volume can be a major reason for the variation in the DC electrical breakdown strength of XLPE with insulation thickness.

ACS Style

M. Shoaib Bhutta; Lijun Yang; Zhipeng Ma; Muhammad Tariq Nazir; Shakeel Akram; M. Ali Mehmood; Nouman Faiz. Simulation of thickness controlled DC breakdown of XLPE regulated by space charge & molecular chain movement. IEEE Transactions on Dielectrics and Electrical Insulation 2020, 27, 1143 -1151.

AMA Style

M. Shoaib Bhutta, Lijun Yang, Zhipeng Ma, Muhammad Tariq Nazir, Shakeel Akram, M. Ali Mehmood, Nouman Faiz. Simulation of thickness controlled DC breakdown of XLPE regulated by space charge & molecular chain movement. IEEE Transactions on Dielectrics and Electrical Insulation. 2020; 27 (4):1143-1151.

Chicago/Turabian Style

M. Shoaib Bhutta; Lijun Yang; Zhipeng Ma; Muhammad Tariq Nazir; Shakeel Akram; M. Ali Mehmood; Nouman Faiz. 2020. "Simulation of thickness controlled DC breakdown of XLPE regulated by space charge & molecular chain movement." IEEE Transactions on Dielectrics and Electrical Insulation 27, no. 4: 1143-1151.

Journal article
Published: 05 August 2020 in IEEE Transactions on Dielectrics and Electrical Insulation
Reads 0
Downloads 0

This paper describes a polyimide (PI)/nanocomposite multilayer 3D model design on the basis of actual boundary conditions attained from SEM images of synthesized films. The impact of nanoparticle dispersion on the electric field enhancement is explicitly described in the model. The electrical properties of these synthesized multilayer PI/nanocomposite films are also measured through experimental results. The results expose that the chances of nanoparticles dispersion are improved by pasting a thin PI/nanocomposite layer on both sides of PI film as compared to the single layer of PI/nanocomposite film. In consequence, less space charge and low electrical fields are observed in multilayer films. Our methods will help to reliably predict the dielectric strength of polymer/nanocomposite insulating materials. Additionally, the new synthesized multilayer PI/nanocomposite insulating material will ensure reliable operation for electric motors and increase its lifespan.

ACS Style

Shakeel Akram; Jerome Castellon; Zhou Kai; Serge Agnel; Jean-Pierre Habas; Muhammad Tariq Nazir. Dielectric properties and modeling of multilayer polyimide nanocomposite to highlight the impact of nanoparticles dispersion. IEEE Transactions on Dielectrics and Electrical Insulation 2020, 27, 1238 -1246.

AMA Style

Shakeel Akram, Jerome Castellon, Zhou Kai, Serge Agnel, Jean-Pierre Habas, Muhammad Tariq Nazir. Dielectric properties and modeling of multilayer polyimide nanocomposite to highlight the impact of nanoparticles dispersion. IEEE Transactions on Dielectrics and Electrical Insulation. 2020; 27 (4):1238-1246.

Chicago/Turabian Style

Shakeel Akram; Jerome Castellon; Zhou Kai; Serge Agnel; Jean-Pierre Habas; Muhammad Tariq Nazir. 2020. "Dielectric properties and modeling of multilayer polyimide nanocomposite to highlight the impact of nanoparticles dispersion." IEEE Transactions on Dielectrics and Electrical Insulation 27, no. 4: 1238-1246.