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Abdul Ghani Olabi
Mechanical Engineering and Design, School of Engineering and Applied Science, Aston University, Aston Triangle, Birmingham B4 7ET, UK

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Review
Published: 27 August 2021 in Buildings
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Advances in building-integrated photovoltaic (BIPV) systems for residential and commercial purposes are set to minimize overall energy requirements and associated greenhouse gas emissions. The BIPV design considerations entail energy infrastructure, pertinent renewable energy sources, and energy efficiency provisions. In this work, the performance of roof/façade-based BIPV systems and the affecting parameters on cooling/heating loads of buildings are reviewed. Moreover, this work provides an overview of different categories of BIPV, presenting the recent developments and sufficient references, and supporting more successful implementations of BIPV for various globe zones. A number of available technologies decide the best selections, and make easy configuration of the BIPV, avoiding any difficulties, and allowing flexibility of design in order to adapt to local environmental conditions, and are adequate to important considerations, such as building codes, building structures and loads, architectural components, replacement and maintenance, energy resources, and all associated expenditure. The passive and active effects of both air-based and water-based BIPV systems have great effects on the cooling and heating loads and thermal comfort and, hence, on the electricity consumption.

ACS Style

Hussein M. Maghrabie; Mohammad Ali Abdelkareem; Abdul Hai Al-Alami; Mohamad Ramadan; Emad Mushtaha; Tabbi Wilberforce; Abdul Ghani Olabi. State-of-the-Art Technologies for Building-Integrated Photovoltaic Systems. Buildings 2021, 11, 383 .

AMA Style

Hussein M. Maghrabie, Mohammad Ali Abdelkareem, Abdul Hai Al-Alami, Mohamad Ramadan, Emad Mushtaha, Tabbi Wilberforce, Abdul Ghani Olabi. State-of-the-Art Technologies for Building-Integrated Photovoltaic Systems. Buildings. 2021; 11 (9):383.

Chicago/Turabian Style

Hussein M. Maghrabie; Mohammad Ali Abdelkareem; Abdul Hai Al-Alami; Mohamad Ramadan; Emad Mushtaha; Tabbi Wilberforce; Abdul Ghani Olabi. 2021. "State-of-the-Art Technologies for Building-Integrated Photovoltaic Systems." Buildings 11, no. 9: 383.

Review
Published: 24 August 2021 in Energies
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To meet the increasing energy demand, renewable energy is considered the best option. Its patronage is being encouraged by both the research and industrial community. The main driving force for most renewable systems is solar energy. It is abundant and pollutant free compared to fossil products. Wind energy is also considered an abundant medium of energy generation and often goes hand in hand with solar energy. The last few decades have seen a sudden surge in wind energy compared to solar energy due to most wind energy systems being cost effective compared to solar energy. Wind turbines are often categorised as large or small depending on their application and energy generation output. Sustainable materials for construction of different parts of wind turbines are being encouraged to lower the cost of the system. The turbine blades and generators perform crucial roles in the overall operation of the turbines; hence, their material composition is very critical. Today, most turbine blades are made up of natural fiber-reinforced polymer (NFRP) as well as glass fiber-reinforced polymer (GFRP). Others are also made from wood and some metallic materials. Each of the materials introduced has specific characteristics that affect the system’s efficiency. This investigation explores the influence of these materials on turbine efficiency. Observations have shown that composites reinforced with nanomaterials have excellent mechanical characteristics. Carbon nanotubes have unique characteristics that may make them valuable in wind turbine blades in the future. It is possible to strengthen carbon nanotubes with various kinds of resins to get a variety of different characteristics. Similarly, the end-of-life treatment methods for composite materials is also presented.

ACS Style

Abdul Ghani Olabi; Tabbi Wilberforce; Khaled Elsaid; Enas Taha Sayed; Tareq Salameh; Mohammad Ali Abdelkareem; Ahmad Baroutaji. A Review on Failure Modes of Wind Turbine Components. Energies 2021, 14, 5241 .

AMA Style

Abdul Ghani Olabi, Tabbi Wilberforce, Khaled Elsaid, Enas Taha Sayed, Tareq Salameh, Mohammad Ali Abdelkareem, Ahmad Baroutaji. A Review on Failure Modes of Wind Turbine Components. Energies. 2021; 14 (17):5241.

Chicago/Turabian Style

Abdul Ghani Olabi; Tabbi Wilberforce; Khaled Elsaid; Enas Taha Sayed; Tareq Salameh; Mohammad Ali Abdelkareem; Ahmad Baroutaji. 2021. "A Review on Failure Modes of Wind Turbine Components." Energies 14, no. 17: 5241.

Editorial
Published: 25 July 2021 in International Journal of Hydrogen Energy
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ACS Style

Abdul Ghani Olabi. Green hydrogen developments. International Journal of Hydrogen Energy 2021, 1 .

AMA Style

Abdul Ghani Olabi. Green hydrogen developments. International Journal of Hydrogen Energy. 2021; ():1.

Chicago/Turabian Style

Abdul Ghani Olabi. 2021. "Green hydrogen developments." International Journal of Hydrogen Energy , no. : 1.

Review
Published: 24 July 2021 in Energy and Built Environment
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Enhancing the energy efficiency of structures has been a staple of energy policies. The key goal is to slash electricity usage in order to minimize the footprint of houses. This goal is sought by putting restrictions on the design specifications with respect to the properties of the raw materials and components as well as the exploitation of sustainable sources of energy. These facts for the basis for zero-energy building (ZEB) being established. This novel technology has faced several obstacles impeding its commercialization and future advancement. This investigation therefore holistically explored and evaluated the state of zero energy building and factors impeding their commercialization. The review further proposed some suggestion in terms of technology that can be considered by the sector to augment existing technologies. Similarly, the investigation touched on the effect of occupant's character in zero energy structures. Policies in terms of government subsidies and tax rebates were recommended to encourage more investors into the sector. Finally, the perception of zero energy building being more expensive compared to the traditional structures can equally be curbed via efficient and effective public sensitization.

ACS Style

Tabbi Wilberforce; A.G. Olabi; Enas Taha Sayed; Khaled Elsaid; Hussein M. Maghrabie; Mohammad Ali Abdelkareem. A review on zero energy buildings – Pros and cons. Energy and Built Environment 2021, 1 .

AMA Style

Tabbi Wilberforce, A.G. Olabi, Enas Taha Sayed, Khaled Elsaid, Hussein M. Maghrabie, Mohammad Ali Abdelkareem. A review on zero energy buildings – Pros and cons. Energy and Built Environment. 2021; ():1.

Chicago/Turabian Style

Tabbi Wilberforce; A.G. Olabi; Enas Taha Sayed; Khaled Elsaid; Hussein M. Maghrabie; Mohammad Ali Abdelkareem. 2021. "A review on zero energy buildings – Pros and cons." Energy and Built Environment , no. : 1.

Journal article
Published: 16 July 2021 in Renewable and Sustainable Energy Reviews
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Metal chalcogenides have received significant attention as electro-catalysts in different applications, due to their superior electrical conductivity and good thermal and mechanical stabilities. In this work, the optimum monocrystalline Ni-P and Ni-C, C (Se, S, O) nanosheet (NS), prepared on nickel foam as standalone anodes for urea fuel cells was introduced. The activity was investigated ex-situ and in-situ the cell. The results demonstrated that the non-oxide metal forms, i.e., Ni–P, Ni–S, and Ni–Se, have superior oxidation activity than the Ni layered double hydroxide (Ni-LDH) and Ni–O. In addition, Ni–Se showed the most superior urea oxidation activity among all prepared catalysts. Although the onset potential of all the samples was around 0.35 V vs Ag/AgCl, a steady current of 195 mAcm−2 was recorded after 120 min using Ni–Se, which is two times higher than that of Ni–S, five times higher than Ni–O, and ten times higher than Ni-LDH. The superior activity of the Ni–Se was related to its unique crystalline structure and the high porous morphology. The performance of Ni–Se electrode under actual direct urea fuel cell (DUFC) operation using a nonprecious a Prussian blue cathode revealed 33 mWcm−2 power, which is, one of the highest power outputs in DUFCs equipped with Ni-based anodes at room temperature, as far as the authors know.

ACS Style

Enas Taha Sayed; Mohammad Ali Abdelkareem; Ahmed Bahaa; Tasnim Eisa; Hussain Alawadhi; Sameer Al-Asheh; Kyu-Jung Chae; A.G. Olabi. Synthesis and performance evaluation of various metal chalcogenides as active anodes for direct urea fuel cells. Renewable and Sustainable Energy Reviews 2021, 150, 111470 .

AMA Style

Enas Taha Sayed, Mohammad Ali Abdelkareem, Ahmed Bahaa, Tasnim Eisa, Hussain Alawadhi, Sameer Al-Asheh, Kyu-Jung Chae, A.G. Olabi. Synthesis and performance evaluation of various metal chalcogenides as active anodes for direct urea fuel cells. Renewable and Sustainable Energy Reviews. 2021; 150 ():111470.

Chicago/Turabian Style

Enas Taha Sayed; Mohammad Ali Abdelkareem; Ahmed Bahaa; Tasnim Eisa; Hussain Alawadhi; Sameer Al-Asheh; Kyu-Jung Chae; A.G. Olabi. 2021. "Synthesis and performance evaluation of various metal chalcogenides as active anodes for direct urea fuel cells." Renewable and Sustainable Energy Reviews 150, no. : 111470.

Review article
Published: 10 July 2021 in Thermal Science and Engineering Progress
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Fuel cells (FCs) have gained increasing attention over the past few years as sustainable energy conversion devices. This is mainly due to their high efficiency due to the direct conversion of chemical energy into electrical energy (the most desirable energy form). Despite the high-energy conversion efficiency of FC, still substantial part of the produced energy is lost as waste heat, hence, proper cooling is necessary to maintain the optimum operating temperature and integrity of the FC. Different heat transfer fluids (HTFs), with water as the most common, are typically used as coolants for FC. In recent years, nanofluids (NFs) have emerged as high-efficiency HTF with remarkably enhanced thermophysical properties. In this work, the application of NFs for heat management and waste heat recovery (WHR) in the FCs has been reviewed and discussed. NFs have been proved to be effective coolants for the FCs. The presence of NFs almost doubles the thermal performance of the FCs while decreasing the size of the cooling system. Additionally, NFs found various applications in the different WHR technologies that can be used for FC devices, like absorption chillers, thermoelectricity generator (TEG), and organic Rankine cycle (ORC) enhancing the performance of the FC-based poly-generation systems. For instance, the use of 0.1 vol.% Al2O3/water-ethylene glycol NF has reduced the heat exchanger size of 2.13 kW proton-exchange membrane FC by about 30%. Moreover, carbon-based NF demonstrated a significant role in improving the performance of microbial FC through the enhancement of the electron transfer between the bulk microorganisms and the anode surface resulting in about a 50% increase in current and power densities.

ACS Style

Enas Taha Sayed; Mohammad Ali Abdelkareem; Mohamed S. Mahmoud; Ahmad Baroutaji; Khaled Elsaid; Tabbi Wilberforce; Hussein M. Maghrabie; G. Olabi. Augmenting Performance of Fuel Cells Using Nanofluids. Thermal Science and Engineering Progress 2021, 101012 .

AMA Style

Enas Taha Sayed, Mohammad Ali Abdelkareem, Mohamed S. Mahmoud, Ahmad Baroutaji, Khaled Elsaid, Tabbi Wilberforce, Hussein M. Maghrabie, G. Olabi. Augmenting Performance of Fuel Cells Using Nanofluids. Thermal Science and Engineering Progress. 2021; ():101012.

Chicago/Turabian Style

Enas Taha Sayed; Mohammad Ali Abdelkareem; Mohamed S. Mahmoud; Ahmad Baroutaji; Khaled Elsaid; Tabbi Wilberforce; Hussein M. Maghrabie; G. Olabi. 2021. "Augmenting Performance of Fuel Cells Using Nanofluids." Thermal Science and Engineering Progress , no. : 101012.

Review article
Published: 26 June 2021 in Renewable and Sustainable Energy Reviews
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Energy-efficient alternative desalination and cooling systems are pivotal in addressing the incredible increase in energy and water demands worldwide. Sorption-based technology is a unique system that could help in solving the energy and water crisis and cut down the overall carbon footprint. Such systems’ performance relies on the adsorption characteristics of the employed nanoporous adsorbent. Although different nanoporous materials were developed, metal-organic frameworks (MOFs) are fast becoming a key working substance in water capture applications due to their interesting adsorption characteristics. Owing to the chemical tunability of MOFs, scientists developed thousands of MOFs in the last few decades. With the increasing interest in MOFs, this review paper provides a comprehensive survey of MOFs adsorbents and their roles in cooling and water desalination systems. Herein, three aspects are covered, the synthesis processes, the adsorption characteristics, and the implementation of MOFs at the system level. Many challenges are discussed, such as mass production, the energy demand for synthesis, and the chemical modulation of MOFs to enhance their adsorption characteristics. Many MOFs are presented, but the sorption characteristics of most of them have not been tested yet. Subsequently, a small number of the presented MOFs have been employed in sorption applications. Accordingly, a gap should be filled to test and employ the MOFs in sorption applications.

ACS Style

Ramy H. Mohammed; Ahmed Rezk; Ahmed Askalany; Ehab S. Ali; A.E. Zohir; Muhammad Sultan; Mohamed Ghazy; Mohammad Ali Abdelkareem; A.G. Olabi. Metal-organic frameworks in cooling and water desalination: Synthesis and application. Renewable and Sustainable Energy Reviews 2021, 149, 111362 .

AMA Style

Ramy H. Mohammed, Ahmed Rezk, Ahmed Askalany, Ehab S. Ali, A.E. Zohir, Muhammad Sultan, Mohamed Ghazy, Mohammad Ali Abdelkareem, A.G. Olabi. Metal-organic frameworks in cooling and water desalination: Synthesis and application. Renewable and Sustainable Energy Reviews. 2021; 149 ():111362.

Chicago/Turabian Style

Ramy H. Mohammed; Ahmed Rezk; Ahmed Askalany; Ehab S. Ali; A.E. Zohir; Muhammad Sultan; Mohamed Ghazy; Mohammad Ali Abdelkareem; A.G. Olabi. 2021. "Metal-organic frameworks in cooling and water desalination: Synthesis and application." Renewable and Sustainable Energy Reviews 149, no. : 111362.

Review
Published: 02 June 2021 in Energies
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The building block of all economies across the world is subject to the medium in which energy is harnessed. Renewable energy is currently one of the recommended substitutes for fossil fuels due to its environmentally friendly nature. Wind energy, which is considered as one of the promising renewable energy forms, has gained lots of attention in the last few decades due to its sustainability as well as viability. This review presents a detailed investigation into this technology as well as factors impeding its commercialization. General selection guidelines for the available wind turbine technologies are presented. Prospects of various components associated with wind energy conversion systems are thoroughly discussed with their limitations equally captured in this report. The need for further optimization techniques in terms of design and materials used for the development of each component is highlighted.

ACS Style

A. Olabi; Tabbi Wilberforce; Khaled Elsaid; Tareq Salameh; Enas Sayed; Khaled Husain; Mohammad Abdelkareem. Selection Guidelines for Wind Energy Technologies. Energies 2021, 14, 3244 .

AMA Style

A. Olabi, Tabbi Wilberforce, Khaled Elsaid, Tareq Salameh, Enas Sayed, Khaled Husain, Mohammad Abdelkareem. Selection Guidelines for Wind Energy Technologies. Energies. 2021; 14 (11):3244.

Chicago/Turabian Style

A. Olabi; Tabbi Wilberforce; Khaled Elsaid; Tareq Salameh; Enas Sayed; Khaled Husain; Mohammad Abdelkareem. 2021. "Selection Guidelines for Wind Energy Technologies." Energies 14, no. 11: 3244.

Review article
Published: 01 May 2021 in Carbon Resources Conversion
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Living organisms' energy conversion is considered as an essential and sustainable green energy source and future bio-hybrid technologies. Recently, plants were used after harvesting as biomass in bio-fermentation as an energy source. In bio-electrochemical systems, microorganisms work with plants to generate electricity, hydrogen, or methane. This work discusses the simultaneous pollutant removal and electricity generation in plant-based bio-electrochemical systems (P-BES). Factors affecting the P-BES performance and the removal efficiencies of the different organic and inorganic pollutants were illustrated. Furthermore, the plant-based bioelectrochemical systems' role in achieving the sustainable development goals (SDGs) was discussed. The SDGs contribution of plant-based bioelectrochemical systems were presented and discussed to evaluate such systems' ability to achieve the three pillars of sustainable development, i.e., economic, environmental, and social.

ACS Style

Enas Taha Sayed; Mohammad Ali Abdelkareem; Khaled Obaideen; Khaled Elsaid; Tabbi Wilberforce; Hussein M. Maghrabie; A.G. Olabi. Progress in plant-based bioelectrochemical systems and their connection with sustainable development goals. Carbon Resources Conversion 2021, 4, 169 -183.

AMA Style

Enas Taha Sayed, Mohammad Ali Abdelkareem, Khaled Obaideen, Khaled Elsaid, Tabbi Wilberforce, Hussein M. Maghrabie, A.G. Olabi. Progress in plant-based bioelectrochemical systems and their connection with sustainable development goals. Carbon Resources Conversion. 2021; 4 ():169-183.

Chicago/Turabian Style

Enas Taha Sayed; Mohammad Ali Abdelkareem; Khaled Obaideen; Khaled Elsaid; Tabbi Wilberforce; Hussein M. Maghrabie; A.G. Olabi. 2021. "Progress in plant-based bioelectrochemical systems and their connection with sustainable development goals." Carbon Resources Conversion 4, no. : 169-183.

Review
Published: 13 April 2021 in Energies
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This review presents a detailed summary of the latest technologies used in flywheel energy storage systems (FESS). This paper covers the types of technologies and systems employed within FESS, the range of materials used in the production of FESS, and the reasons for the use of these materials. Furthermore, this paper provides an overview of the types of uses of FESS, covering vehicles and the transport industry, grid leveling and power storage for domestic and industrial electricity providers, their use in motorsport, and applications for space, satellites, and spacecraft. Different types of machines for flywheel energy storage systems are also discussed. This serves to analyse which implementations reduce the cost of permanent magnet synchronous machines. As well as this, further investigations need to be carried out to determine the ideal temperature range of operation. Induction machines are currently stoutly designed with lower manufacturing cost, making them unsuitable for high-speed operations. Brushless direct current machines, the Homolar machines, and permanent magnet synchronous machines should also be considered for future research activities to improve their performance in a flywheel energy storage system. An active magnetic bearing can also be used alongside mechanical bearings to reduce the control systems’ complications, thereby making the entire system cost-effective.

ACS Style

Abdul Olabi; Tabbi Wilberforce; Mohammad Abdelkareem; Mohamad Ramadan. Critical Review of Flywheel Energy Storage System. Energies 2021, 14, 2159 .

AMA Style

Abdul Olabi, Tabbi Wilberforce, Mohammad Abdelkareem, Mohamad Ramadan. Critical Review of Flywheel Energy Storage System. Energies. 2021; 14 (8):2159.

Chicago/Turabian Style

Abdul Olabi; Tabbi Wilberforce; Mohammad Abdelkareem; Mohamad Ramadan. 2021. "Critical Review of Flywheel Energy Storage System." Energies 14, no. 8: 2159.

Journal article
Published: 09 April 2021 in Sustainability
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This paper identifies the best energy management strategy of hybrid photovoltaic–diesel battery-based water desalination systems in isolated regions using technical, economic and techno–economic criteria. The employed procedures include Criteria Importance Through Intercriteria Correlation (CRITIC) and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) as tools for the solution. Twelve alternatives, containing three–four energy management strategies; four energy management strategies, load following (LF), cycle charging (CC), combined LF–CC, and predictive strategy; and three different sizes of brackish water reverse osmosis (BWRO) water desalination units, BWRO-150, BWRO-250, and BWRO-500, are investigated with capacity of 150, 250, and 500 m3/day, respectively. Eight attributes comprising different technical and economic metrics are considered during the evaluation procedure. HOMER Pro® software is utilized to perform the simulation and optimization. The main findings confirmed that the best energy management strategies are predictive strategies and the reverse osmosis (RO) unit’s optimal size is RO-250. For such an option, the annual operating cost and initial costs are $4590 and $78,435, respectively, whereas the cost of energy is $0.156/kWh. The excess energy and unmet loads are 27,532 kWh and 20.3 kWh, respectively. The breakeven grid extension distance and the amount of CO2 are 6.02 km and 14,289 kg per year, respectively. Compared with CC–RO-150, the amount of CO2 has been sharply decreased by 61.2%.

ACS Style

Hegazy Rezk; Basem Alamri; Mokhtar Aly; Ahmed Fathy; Abdul Olabi; Mohammad Abdelkareem; Hamdy Ziedan. Multicriteria Decision-Making to Determine the Optimal Energy Management Strategy of Hybrid PV–Diesel Battery-Based Desalination System. Sustainability 2021, 13, 4202 .

AMA Style

Hegazy Rezk, Basem Alamri, Mokhtar Aly, Ahmed Fathy, Abdul Olabi, Mohammad Abdelkareem, Hamdy Ziedan. Multicriteria Decision-Making to Determine the Optimal Energy Management Strategy of Hybrid PV–Diesel Battery-Based Desalination System. Sustainability. 2021; 13 (8):4202.

Chicago/Turabian Style

Hegazy Rezk; Basem Alamri; Mokhtar Aly; Ahmed Fathy; Abdul Olabi; Mohammad Abdelkareem; Hamdy Ziedan. 2021. "Multicriteria Decision-Making to Determine the Optimal Energy Management Strategy of Hybrid PV–Diesel Battery-Based Desalination System." Sustainability 13, no. 8: 4202.

Research article
Published: 08 April 2021 in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
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This paper introduces a comprehensive overview of various graphene production and deposition processes with a main focus on their utilization for energy harvesting and augmentation applications. A focused view on simple yet effective mechanical exfoliation techniques to produce graphene, and sometimes simultaneously deposit it. Two of these techniques, i.e. ball milling technique and compressed air blasting of graphite have been used and developed in our labs, respectively. The produced and deposited graphene via these methods is tested for energy harvesting enhancement in applications such as the spectral absorption enhancement of solar thermal collectors, electrode production for capacitive deionization, and as Nano-spacers in SERS applications for solar PV cells with an increase in 28% compared with Pt-based counterelectrode. The two mechanical production processes of graphene discussed are facile, economical and rapid, and is expected to bring solid-state graphene production a step closer to automation, a concept that is currently synonymous only with solution-based processes. These processes enabled the incorporation of a graphene layer on solar thermal collectors and this layer has exhibited 43% enhancement in efficiency than ones that did not have a graphene layer. Because of graphene eminence and its well-established place in many areas one of them being energy this is due to its unique thermal, mechanical, optical, electronic, and chemical properties. This paper will analyze the tools used for the synthesis of graphene and their throughput, cost and ease of use.

ACS Style

Abdul Hai Alami; Kamilia Aokal; Abdul Ghani Olabi; Shamma Alasad; Haya Aljaghoub. Applications of graphene for energy harvesting applications: Focus on mechanical synthesis routes for graphene production. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 2021, 1 -30.

AMA Style

Abdul Hai Alami, Kamilia Aokal, Abdul Ghani Olabi, Shamma Alasad, Haya Aljaghoub. Applications of graphene for energy harvesting applications: Focus on mechanical synthesis routes for graphene production. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects. 2021; ():1-30.

Chicago/Turabian Style

Abdul Hai Alami; Kamilia Aokal; Abdul Ghani Olabi; Shamma Alasad; Haya Aljaghoub. 2021. "Applications of graphene for energy harvesting applications: Focus on mechanical synthesis routes for graphene production." Energy Sources, Part A: Recovery, Utilization, and Environmental Effects , no. : 1-30.

Journal article
Published: 02 April 2021 in Applied Surface Science
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Mesoporous Co dendrites prepared by electroplating have a surface area of 145 m2g−1, which is three times that of Co nanoparticles. The Co dendrites demonstrate superior urea oxidation activity compared to Ni or Co nanoparticles prepared using chemical reduction. The onset potential with Co dendrites is around 0 V “vs. Ag/AgCl” using 2 M urea, that is remarkably lower than 0.35 V “vs. Ag/AgCl” for Ni catalyst at optimum urea concentration of 0.5 M. The current produced in case of the Co dendrites using 2 M urea at 0.5 V “vs. Ag/AgCl” was six times that obtained using Ni. The in-situ measurements using Co dendrites on the Ni foam as anode and Prussian blue as cathode catalyst demonstrated a 21 mWcm−2 at 20 °C. These are the first reported results for a complete Ni-free nonprecious anode and cathode catalysts under real fuel cell operation with high performance comparable to those obtained using precious catalyst under same conditions.

ACS Style

Enas Taha Sayed; Mohammad Ali Abdelkareem; Hussain Alawadhi; A.G. Olabi. Enhancing the performance of direct urea fuel cells using Co dendrites. Applied Surface Science 2021, 555, 149698 .

AMA Style

Enas Taha Sayed, Mohammad Ali Abdelkareem, Hussain Alawadhi, A.G. Olabi. Enhancing the performance of direct urea fuel cells using Co dendrites. Applied Surface Science. 2021; 555 ():149698.

Chicago/Turabian Style

Enas Taha Sayed; Mohammad Ali Abdelkareem; Hussain Alawadhi; A.G. Olabi. 2021. "Enhancing the performance of direct urea fuel cells using Co dendrites." Applied Surface Science 555, no. : 149698.

Review article
Published: 27 March 2021 in Thermal Science and Engineering Progress
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This investigation conducted a thorough review of the application of nanomaterials to improve the performance of phase change material (PCM) for energy storage applications. It was deduced that issues pertaining to thermal conductivity coupled with a leakage are key factors restricting the wider application of PCM. In this regard, the application of nanomaterial is considered a very promising and practical technique to address this challenge. The specific application of carbon-based nanomaterial (CBM) embedded in PCM has been found to be very efficient, hence improving the PCM performance. The impact of the CBM on the PCM is enormous due to their excellent thermal characteristics, along with enhanced electrical and mechanical characteristics. The applications of various dimensional CBMs were critically explored and presented in this work. The merits and demerits of these materials were also carefully discussed. The addition of CBM has shown to result in an increase in thermal conductivity up to 264% depending on the material and loading, which has resulted in enhancement of the thermal characteristics by up to 28 times, which can be attributed to the extremely high thermal conductivity of CBM within the range of 6–2,500 W/m.K. Additionally, the incorporation of CBM has been shown to reduce leakage in the case of microencapsulated PCM. The mechanical strength of PCM-cement material has been shown to increase upon the addition of CBM as well. The stability of CBM-PCM in terms of phase transition temperature and latent heat was found to be improved as well.

ACS Style

A.G. Olabi; Tabbi Wilberforce; Khaled Elsaid; Enas Taha Sayed; Mohamad Ramadan; S.M. Atiqure Rahman; Mohammad Ali Abdelkareem. Recent progress on Carbon-based nanomaterial for phase change materials: Prospects and challenges. Thermal Science and Engineering Progress 2021, 23, 100920 .

AMA Style

A.G. Olabi, Tabbi Wilberforce, Khaled Elsaid, Enas Taha Sayed, Mohamad Ramadan, S.M. Atiqure Rahman, Mohammad Ali Abdelkareem. Recent progress on Carbon-based nanomaterial for phase change materials: Prospects and challenges. Thermal Science and Engineering Progress. 2021; 23 ():100920.

Chicago/Turabian Style

A.G. Olabi; Tabbi Wilberforce; Khaled Elsaid; Enas Taha Sayed; Mohamad Ramadan; S.M. Atiqure Rahman; Mohammad Ali Abdelkareem. 2021. "Recent progress on Carbon-based nanomaterial for phase change materials: Prospects and challenges." Thermal Science and Engineering Progress 23, no. : 100920.

Journal article
Published: 26 March 2021 in Sustainable Energy Technologies and Assessments
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A key medium for energy generation globally is the solar energy. The present work evaluates the challenges of building-integrated photovoltaic (BIPVT) required for various applications from techno-economic and environmental points of view. Many challenges are found for applying solar photovoltaics (PVs) modules combined with building systems: supplying hot and cold water and ventilation for the residential and non-residential building. Moreover, efforts and advances achieved in enhancing the BIPVT thermal and electrical performance are explored. Additionally, the review provides further insight into recognizing the fundamental science of the BIPVT systems, explaining its rapid developments and the thermal performance mechanisms. The BIPVT systems designed for rooftops, windows, and facades are specifically highlighted in the present review. Furthermore, the status of PV modules and BIPVT system, benefits, applications, barriers and challenges, and future prospects are discussed. The BIPVT systems require governmental support and a more economically convenient and efficient tariff to maintain the economic feasibility of the system. The key factors impeding the commercialization of BIPVT systems are the implementation of the feed-in tariff, customers’ perception, national economic support, technical aspects such as the performance, system management, and architectural and material considerations. Finally, this review indicates that further works concerned the BIPVT systems to enhance the technology and advancements are still required.

ACS Style

Hussein M. Maghrabie; Khaled Elsaid; Enas Taha Sayed; Mohammad Ali Abdelkareem; Tabbi Wilberforce; A.G. Olabi. Building-integrated photovoltaic/thermal (BIPVT) systems: Applications and challenges. Sustainable Energy Technologies and Assessments 2021, 45, 101151 .

AMA Style

Hussein M. Maghrabie, Khaled Elsaid, Enas Taha Sayed, Mohammad Ali Abdelkareem, Tabbi Wilberforce, A.G. Olabi. Building-integrated photovoltaic/thermal (BIPVT) systems: Applications and challenges. Sustainable Energy Technologies and Assessments. 2021; 45 ():101151.

Chicago/Turabian Style

Hussein M. Maghrabie; Khaled Elsaid; Enas Taha Sayed; Mohammad Ali Abdelkareem; Tabbi Wilberforce; A.G. Olabi. 2021. "Building-integrated photovoltaic/thermal (BIPVT) systems: Applications and challenges." Sustainable Energy Technologies and Assessments 45, no. : 101151.

Journal article
Published: 24 March 2021 in International Journal of Thermofluids
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This study aims to model and optimize the performance of a shell and helically coiled tube heat exchanger application using Aluminum oxide (Al2O3) and Silicon dioxide (SiO2) nanofluids. An adaptive network-based fuzzy inference system (ANFIS) in MATLAB was used to build the fuzzy logic model for density, viscosity, specific heat, and thermal conductivity properties of nanofluid. The accuracy of the model was evaluated by checking the mean square error (MSE) for training data, testing data, and all data. The particle swarm optimization (PSO) based on the effectiveness of heat exchanger and friction factor as objective functions were used to find the optimum nanofluid properties. The optimum properties can be achieved by minimizing the viscosity and specific heat and maximizing the thermal conductivity; while keeping the density at optimum value for this application. The optimal properties of nanofluids were found at 60 °C using a hybrid nanofluid consisting of 0.3 Al2O3 and 0.1 SiO2. The optimum values of the density, viscosity, specific heat, and thermal conductivity were 985.77 kg/m3, 0.000471 Pa.s, 4129.36 J/kg.°K and 0.71069 W/m. °K, respectively. The coupling between the fuzzy model and the PSO method was effective to find the optimum properties of nanofluids under operation.

ACS Style

Tareq Salameh; Polamarasetty P. Kumar; Enas Taha Sayed; Mohammad Ali Abdelkareem; Hegazy Rezk; A.G. Olabi. Fuzzy modeling and particle swarm optimization of Al2O3/SiO2 nanofluid. International Journal of Thermofluids 2021, 10, 100084 .

AMA Style

Tareq Salameh, Polamarasetty P. Kumar, Enas Taha Sayed, Mohammad Ali Abdelkareem, Hegazy Rezk, A.G. Olabi. Fuzzy modeling and particle swarm optimization of Al2O3/SiO2 nanofluid. International Journal of Thermofluids. 2021; 10 ():100084.

Chicago/Turabian Style

Tareq Salameh; Polamarasetty P. Kumar; Enas Taha Sayed; Mohammad Ali Abdelkareem; Hegazy Rezk; A.G. Olabi. 2021. "Fuzzy modeling and particle swarm optimization of Al2O3/SiO2 nanofluid." International Journal of Thermofluids 10, no. : 100084.

Journal article
Published: 26 February 2021 in International Journal of Thermofluids
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Heat transfer operations are very common in the process industry to transfer a huge amount of thermal energy, i.e., heat, from one fluid to another for different purposes. Many fluids are used as heat transfer fluid (HTF), in which water is the most common HTF due to its high specific heat, availability, and affordability. However, conventional HTFs, including water, have a lower thermal conductivity, which is the most critical thermophysical property, hence decreased heat transfer efficiency. The addition of solid particles of highly thermally conductive material, specifically at nano-size, i.e., nanoparticles NPs, result in nanofluid NF, which has evolved over the last two decades as efficient HTF and have been investigated in a wide range of applications. Among NPs, graphene (Gr) based materials have shown very high potential as NF due to the very high thermal conductivity up to 5,000 W/m.K, hence higher thermal conductivity NF. This work aims to thoroughly discuss the thermophysical properties of Gr-based NFs, including thermal conductivity, heat capacity, density, and viscosity. The discussion focus on the thermophysical properties as it is the ultimate determinator of the heat transfer characteristics of the HTF, such as the convective and the overall heat transfer coefficient as well as the heat transfer capacity of the NF. The discussion expands to the relative enhancement in such thermophysical properties reaching up to a 40% increase in thermal conductivity, as the most critical thermophysical property. The discussion shows that Gr-based NF has a much higher thermal conductivity relative to widely studied metal oxide NF and at much lower content, and lower density and viscosity increase, which is critical for determining the pumping power requirements. Critical challenges facing the application of Gr-based NFs such as cost, stability, increased density and viscosity, and environmental impacts are thoroughly discussed with mitigation recommendations given.

ACS Style

Khaled Elsaid; Mohammad Ali Abdelkareem; Hussein M. Maghrabie; Enas Taha Sayed; Tabbi Wilberforce; Ahmad Baroutaji; A.G. Olabi. Thermophysical properties of graphene-based nanofluids. International Journal of Thermofluids 2021, 10, 100073 .

AMA Style

Khaled Elsaid, Mohammad Ali Abdelkareem, Hussein M. Maghrabie, Enas Taha Sayed, Tabbi Wilberforce, Ahmad Baroutaji, A.G. Olabi. Thermophysical properties of graphene-based nanofluids. International Journal of Thermofluids. 2021; 10 ():100073.

Chicago/Turabian Style

Khaled Elsaid; Mohammad Ali Abdelkareem; Hussein M. Maghrabie; Enas Taha Sayed; Tabbi Wilberforce; Ahmad Baroutaji; A.G. Olabi. 2021. "Thermophysical properties of graphene-based nanofluids." International Journal of Thermofluids 10, no. : 100073.

Journal article
Published: 20 February 2021 in Membranes
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A low cost bipolar plate materials with a high fuel cell performance is important for the establishment of Proton Exchange Membrane (PEM ) fuel cells into the competitive world market. In this research, the effect of different bipolar plates material such as Aluminum (Al), Copper (Cu), and Stainless Steel (SS) of a single stack of proton exchange membrane (PEM) fuel cells was investigated both numerically and experimentally. Firstly, a three dimensional (3D) PEM fuel cell model was developed, and simulations were conducted using commercial computational fluid dynamics (CFD) ANSYS FLUENT to examine the effect of each bipolar plate materials on cell performance. Along with cell performance, significant parameters distributions like temperature, pressure, a mass fraction of hydrogen, oxygen, and water is presented. Then, an experimental study of a single cell of Al, Cu, and SS bipolar plate material was used in the verification of the numerical investigation. Finally, polarization curves of numerical and experimental results was compared for validation, and the result shows that Al serpentine bipolar plate material performed better than Cu and SS materials. The outcome of the investigation was in tandem to the fact that due to adsorption on metal surfaces, hydrogen molecules is more stable on Al surface than Cu and SS surfaces.

ACS Style

Tabbi Wilberforce; Oluwatosin Ijaodola; Ogungbemi Emmanuel; James Thompson; Abdul Olabi; Mohammad Abdelkareem; Enas Sayed; Khaled Elsaid; Hussein Maghrabie. Optimization of Fuel Cell Performance Using Computational Fluid Dynamics. Membranes 2021, 11, 146 .

AMA Style

Tabbi Wilberforce, Oluwatosin Ijaodola, Ogungbemi Emmanuel, James Thompson, Abdul Olabi, Mohammad Abdelkareem, Enas Sayed, Khaled Elsaid, Hussein Maghrabie. Optimization of Fuel Cell Performance Using Computational Fluid Dynamics. Membranes. 2021; 11 (2):146.

Chicago/Turabian Style

Tabbi Wilberforce; Oluwatosin Ijaodola; Ogungbemi Emmanuel; James Thompson; Abdul Olabi; Mohammad Abdelkareem; Enas Sayed; Khaled Elsaid; Hussein Maghrabie. 2021. "Optimization of Fuel Cell Performance Using Computational Fluid Dynamics." Membranes 11, no. 2: 146.

Review article
Published: 17 February 2021 in Chemosphere
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Capacitive deionization (CDI) is one of the emerging desalination technologies that attracted much attention in the last years as a low-cost, energy-efficient, and environmentally-friendly alternative to other desalination technologies, such as multi-stage flash desalination (MSF) and multiple effect distillation (MED). The implementation of faradaic electrode materials is a promising method for enhancing CDI systems’ performance by achieving higher salt removal characteristics, lower energy consumption, and better ion selectivity. Therefore, a novel CDI technology named Faradaic CDI (FCDI) that implements faradaic electrode materials arose as a high-performance CDI cell design. In this work, the application of FCDI cells in desalination and wastewater treatment systems is reviewed. First, the progress done on using various FCDI systems for saline water desalination is summarized and discussed. Next, the application of FCDI in wastewater treatment applications and selective ion removal is presented. A thorough comparison between FCDI and conventional carbon-based CDI is carried out in terms of working principle, electrode material’s cost, salt removal performance, energy consumption, advantages, and disadvantages. Finally, future research consideration regarding FCDI technology is included to drive this technology closer towards practical application.

ACS Style

Enas Taha Sayed; Muaz Al Radi; Aasim Ahmad; Mohammad Ali Abdelkareem; Hussain Alawadhi; Muataz Ali Atieh; A.G. Olabi. Faradic capacitive deionization (FCDI) for desalination and ion removal from wastewater. Chemosphere 2021, 275, 130001 .

AMA Style

Enas Taha Sayed, Muaz Al Radi, Aasim Ahmad, Mohammad Ali Abdelkareem, Hussain Alawadhi, Muataz Ali Atieh, A.G. Olabi. Faradic capacitive deionization (FCDI) for desalination and ion removal from wastewater. Chemosphere. 2021; 275 ():130001.

Chicago/Turabian Style

Enas Taha Sayed; Muaz Al Radi; Aasim Ahmad; Mohammad Ali Abdelkareem; Hussain Alawadhi; Muataz Ali Atieh; A.G. Olabi. 2021. "Faradic capacitive deionization (FCDI) for desalination and ion removal from wastewater." Chemosphere 275, no. : 130001.

Journal article
Published: 16 February 2021 in International Journal of Thermofluids
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Heat exchangers are widely utilized in different thermal systems for diverse industrial aspects. The selection of HEx depends on the thermal efficiency, operating load, size, flexibility in operation, compatibility with working fluids, better temperature and flow controls, and comparatively low capital and maintenance costs. Heat transfer intensification of heat exchangers can be fulfilled using passive, active, or combined approaches. Utilizing nanofluids as working fluids for heat exchangers have evolved recently. The performance of heat exchangers employed different nanofluids depends mainly on the characteristics and improvement of thermophysical properties. Regarding the unique behavior of different nanofluids, researchers have attended noteworthy progress. The current study reviews and summarizes the recent implementations carried out on utilizing nanofluids in different types of heat exchangers, including plate heat exchangers, double-pipe heat exchangers, shell and tube heat exchangers, and cross-flow heat exchangers. The results showed that nanofluids with enhanced thermal conductivity, although accompanied by a considerable decrease in the heat capacity and raising viscosity, has resulted in performance enhancement of different heat exchangers types. So, the performance evaluation criterion that combines the thermal enhancement and increases the pumping power for any type of heat exchangers is requisite to evaluate the overall performance properly. The challenges and opportunities for future work of heat transfer and fluid flow for different types of heat exchangers utilizing nanofluids are discussed and presented.

ACS Style

Hussein M. Maghrabie; Khaled Elsaid; Enas Taha Sayed; Mohammad Ali Abdelkareem; Tabbi Wilberforce; Mohamad Ramadan; A.G. Olabi. Intensification of heat exchanger performance utilizing nanofluids. International Journal of Thermofluids 2021, 10, 100071 .

AMA Style

Hussein M. Maghrabie, Khaled Elsaid, Enas Taha Sayed, Mohammad Ali Abdelkareem, Tabbi Wilberforce, Mohamad Ramadan, A.G. Olabi. Intensification of heat exchanger performance utilizing nanofluids. International Journal of Thermofluids. 2021; 10 ():100071.

Chicago/Turabian Style

Hussein M. Maghrabie; Khaled Elsaid; Enas Taha Sayed; Mohammad Ali Abdelkareem; Tabbi Wilberforce; Mohamad Ramadan; A.G. Olabi. 2021. "Intensification of heat exchanger performance utilizing nanofluids." International Journal of Thermofluids 10, no. : 100071.