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Prof. Dr. Hussain H. Al-Kayiem
Head of solar thermal advanced research center [STARC], Universiti Teknologi PETRONAS

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Research Keywords & Expertise

0 TES
0 drag reduction
0 Enhanced Heat Transfer
0 hybrid solar systems
0 Multiphase slug flow

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nanofluids and nanocomposites
Enhanced Heat Transfer

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Short Biography

Completed his BSc, 1973; MSc, 1981 University of Baghdad; Ph.D. from University of Bradford, UK, 1989. Appointed as the head of the Mechanical Engineering Department at the Military College of Engineering, Baghdad, 1990–1997, and headed the Mechanical Engineering Department at Al-Mustansiryah University, Baghdad 1998-2003. Manager of the Netherlands Engineering Consultants, MEDECO, Iraq branch, 2003–2005. Joint Universiti Teknologi PETRONAS (UTP) in Malaysia from 2006 to the present. He is a leader in Thermo-Fluids and Energy Technologies. He has published around 280 research papers, 5 books, and 9 chapters in books. He has supervised more than 75 Postgraduates, 65 graduated and 10 are ongoing

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Journal article
Published: 01 August 2021 in Journal of Building Engineering
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The energy-saving propensity of liquid desiccant air dehumidification technique compared with its counterparts, mitigating the limitations of conventional desiccant solutions and the need for energy optimization in indoor space cooling, has invigorated the exploration of alternative desiccant solutions. This study investigates different binary deep eutectic solvents as a potential alternative working fluids in liquid desiccant air conditioning systems. Hydrogen bond acceptors (Choline chloride, N, N-Diethylethanolammonium chloride, 1-Butyl-3-methylimidazolium chloride, ZnCl2) and hydrogen bond donor (Ethylene glycol) were synthesized in different ratios to form binary deep eutectic solvents. The physiochemical, thermophysical and rheological properties of the investigated solutions were characterized and evaluated. DES A1 (mixture of choline chloride and ethylene glycol in ratio 1:2) and DES D1 (1-Butyl-3-methylimidazolium chloride and ethylene glycol in ratio 1:1) were found best among investigated binary DES solutions. The dehumidification and thermal regeneration potential of these promising solutions were further investigated in a humidity chamber and a drying oven, respectively. At 65 % relative humidity, 30 °C air temperature, and 3.77 × 10−4 m2 moisture-desiccant contact area, the estimated dehumidification mass flux of DES A1 and DES D1 are 4.61 × 10−2 and 3 × 10−2 g/m2∙s, respectively. Empirical correlations obtained for deep eutectic solvents moisture absorption in this study provide an error limit between ±2.6 % to ±3.5 %. These solutions are found promising as alternative solutions for dehumidification and thermal regeneration.

ACS Style

Temidayo L. Oladosu; Hussain H. Al-Kayiem; Syed I.U. Gilani; Aklilu T. Baheta. Dehumidification and thermal regeneration characterization of binary deep eutectic solvents in liquid desiccant air conditioning systems. Journal of Building Engineering 2021, 42, 103056 .

AMA Style

Temidayo L. Oladosu, Hussain H. Al-Kayiem, Syed I.U. Gilani, Aklilu T. Baheta. Dehumidification and thermal regeneration characterization of binary deep eutectic solvents in liquid desiccant air conditioning systems. Journal of Building Engineering. 2021; 42 ():103056.

Chicago/Turabian Style

Temidayo L. Oladosu; Hussain H. Al-Kayiem; Syed I.U. Gilani; Aklilu T. Baheta. 2021. "Dehumidification and thermal regeneration characterization of binary deep eutectic solvents in liquid desiccant air conditioning systems." Journal of Building Engineering 42, no. : 103056.

Journal article
Published: 24 July 2021 in Sustainability
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The aggressive growth of Eichhornia crassipes (Water Hyacinth) plants causes severe damage to the irrigation, environment, and waterway systems in Iraq. This study aims to produce, characterize, and test biofuel extracted from the Eichhornia crassipes plant in Iraq. The extracted biodiesel was mixed at 10%, 20%, and 40% with neat diesel to produce three biodiesel samples. The methodology consists of the physiochemical properties of the samples that were characterized. The performance of the IC engine fueled by neat and biodiesel samples was measured under various operational conditions. The exhaust gases were analyzed to estimate the compounds to assess the environmental impact. The results showed that the density and viscosity of mixtures increase and the calorific value decrease with biodiesel. The engine test showed that the diesel + 10BE, diesel + 20BE, and diesel + 40BE enhanced brake thermal efficiency using 2.6%, 4.2%, and 6.3%, respectively, compared to neat diesel. Exhaust tests show a slight reduction, of 0.85–3.69% and 2.48–6.93%, in CO and HC emission, respectively. NOx is higher by 1.87–7.83% compared with neat diesel. The results revealed that biodiesel blended from Eichhornia crassipes is a viable solution to mitigate the drastic impact on the environment and economy in Iraq. The blended biodiesel has good potential to be mixed with the locally produced diesel from oil refineries.

ACS Style

Hasanain Abdul Wahhab; Hussain Al-Kayiem. Environmental Risk Mitigation by Biodiesel Blending from Eichhornia crassipes: Performance and Emission Assessment. Sustainability 2021, 13, 8274 .

AMA Style

Hasanain Abdul Wahhab, Hussain Al-Kayiem. Environmental Risk Mitigation by Biodiesel Blending from Eichhornia crassipes: Performance and Emission Assessment. Sustainability. 2021; 13 (15):8274.

Chicago/Turabian Style

Hasanain Abdul Wahhab; Hussain Al-Kayiem. 2021. "Environmental Risk Mitigation by Biodiesel Blending from Eichhornia crassipes: Performance and Emission Assessment." Sustainability 13, no. 15: 8274.

Journal article
Published: 13 July 2021 in Journal of Cleaner Production
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Solar vortex is a clean technique for power generation. It is known for its low energy conversion efficiency. A sufficient air heating zone can enhance it to initiate and maintain a powerful swirly upward airflow. This paper presents experimental results of the performance enhancement of a solar vortex power generator by enhancing the photothermic conversion using Al2O3-in-black paint coating. Photothermic enhancement of four different 5%wt metallic powder-in-black paint was evaluated experimentally using a modified solar air heater comprising five compartments. Each compartment consisted of identical 1100 × 150 mm Aluminum absorbers tagged as an uncoated absorber, absorber coated with black enamel paint, absorber coated with Al2O3-in-black paint, absorber coated with CuO-in-black paint and absorber coated with Al2O3–CuO-in-black paint. Results show that the best solar photothermic conversion was achieved by an absorber plate coated with Al2O3-in-black paint. The mean enhancement in the thermal efficiency of the solar air heater was 51.0%, and air temperature rise was increased by 28.5%, compared with the nonpainted absorber. Since Al2O3 was the most effective coating, it has been used to enhance the performance of the solar vortex power generation system by coating the surface of the vortex generation engine. The 5%wt Al2O3-in-black paint demonstrated improvement by 17.4% in heat gain compared to the unpainted surface of the solar vortex generator.

ACS Style

Hussain H. Al-Kayiem; Ali A. Ismaeel; Aklilu T. Baheta; Mohammed A. Aurybi. Performance enhancement of solar vortex power generator by Al2O3-in-black paint coating. Journal of Cleaner Production 2021, 316, 128303 .

AMA Style

Hussain H. Al-Kayiem, Ali A. Ismaeel, Aklilu T. Baheta, Mohammed A. Aurybi. Performance enhancement of solar vortex power generator by Al2O3-in-black paint coating. Journal of Cleaner Production. 2021; 316 ():128303.

Chicago/Turabian Style

Hussain H. Al-Kayiem; Ali A. Ismaeel; Aklilu T. Baheta; Mohammed A. Aurybi. 2021. "Performance enhancement of solar vortex power generator by Al2O3-in-black paint coating." Journal of Cleaner Production 316, no. : 128303.

Journal article
Published: 26 June 2021 in Solar Energy
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Solar drying is an important industrial technology with expanding segment in the industrial solar market. The main drawback in commercializing solar dryers is the non-appropriate design of the drying chamber to perform uniform drying and hence producing a nonhomogeneous product. Uniformity of airflow inside the drying chamber has a significant role in the drying process. The current article presents an experimental and computational analysis of a hybrid solar-thermal dryer with a multi-chamber drying cabinet. A prototype was designed and fabricated to including three separate chambers, and each has one angular-movable tray for experimental measurements. The computational model was developed in ANSYS Fluent software for CFD simulation and validated by comparing the experimental results. A statistical analysis of the simulation results has been performed. The focus was made on the effect of tray inclination angle, 0°, 10°, 20°, 30° and 35°, air velocity and turbulence intensity distribution inside the drying cabinet at various operational conditions. Experimental and numerical analysis results indicate that the best uniformity is achieved in the tray with 30° inclination. Statistical analysis results revealed that around 93% of velocity frequency is obtained at 0.7–0.8 m/s air velocity level for 30° tray angle.

ACS Style

Hussain H. Al-Kayiem; Ali Ahmed Gitan. Flow uniformity assessment in a multi-chamber cabinet of a hybrid solar dryer. Solar Energy 2021, 224, 823 -832.

AMA Style

Hussain H. Al-Kayiem, Ali Ahmed Gitan. Flow uniformity assessment in a multi-chamber cabinet of a hybrid solar dryer. Solar Energy. 2021; 224 ():823-832.

Chicago/Turabian Style

Hussain H. Al-Kayiem; Ali Ahmed Gitan. 2021. "Flow uniformity assessment in a multi-chamber cabinet of a hybrid solar dryer." Solar Energy 224, no. : 823-832.

Journal article
Published: 11 May 2021 in Solar Energy
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Solar photovoltaic panels are experiencing lower performance due to two reasons, high diurnal surface temperatures and nocturnal dew accumulation leading to mud formation on the surface of photovoltaic panels. The current paper presents a collective solution for the two problems of elevated cell temperatures and dew formation using a photovoltaic/thermal unit integrated with ground embedded heat exchanger. The proposed technique was assessed experimentally and mathematically. An experimental setup implemented in the solar research site of Universiti Teknologi PETRONAS was subjected to a series of measurements under various operational and environmental conditions. A mathematical model of the integrated solution was developed in MATLAB/Simulink environment. With only 6% error in PV surface temperatures, the mathematical model results and experimental measurements were in good agreement. The model determined the daily and annual variation of the PV surface temperature based on two real-time weather data sets: first, the nearly constant tropical climates as in Malaysia and secondly, the transient climatic conditions as in the desert of Qatar. The results show that the suggested idea of integrating a PV/T panel with an underground heat exchanger is able to increase the annual PV efficiency by 9%. This is due to a substantial reduction of diurnal PV cell temperatures and to resolving the setback of nocturnal dew formation.

ACS Style

M.N. Reda; M. Spinnler; H.H. Al-Kayiem; T. Sattelmayer. Assessment of condensation and thermal control in a photovoltaic panel by PV/T and ground heat exchanger. Solar Energy 2021, 221, 502 -511.

AMA Style

M.N. Reda, M. Spinnler, H.H. Al-Kayiem, T. Sattelmayer. Assessment of condensation and thermal control in a photovoltaic panel by PV/T and ground heat exchanger. Solar Energy. 2021; 221 ():502-511.

Chicago/Turabian Style

M.N. Reda; M. Spinnler; H.H. Al-Kayiem; T. Sattelmayer. 2021. "Assessment of condensation and thermal control in a photovoltaic panel by PV/T and ground heat exchanger." Solar Energy 221, no. : 502-511.

Journal article
Published: 16 April 2021 in Energies
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The present study investigates the effect of TiO2 nanoparticles on the stability of Enhanced Oil Recovery (EOR)-produced stable emulsion. The chemical precipitation method is used to synthesize TiO2 nanoparticles, and their properties were determined using various analytical characterization techniques such as X-ray Diffraction (XRD), High-Resolution Transmission Electron Microscopy (HRTEM), and Field Emission Scanning Electron Microscopy (FESEM). The effect of TiO2 nanoparticles is evaluated by measuring oil/water (o/w) separation, rag layer formation, oil droplet size, and zeta potential of the residual EOR produced emulsion. The laser scattering technique is used to determine the o/w separation. The results showed that spherical-shaped anatase phase TiO2 nanoparticles were produced with an average particle size of 122 nm. The TiO2 nanoparticles had a positive effect on o/w separation and the clarity of the separated water. The separated aqueous phases’ clarity is 75% and 45% with and without TiO2 nanoparticles, respectively. Laser scattering analysis revealed enhanced light transmission in the presence of TiO2 nanoparticles, suggesting higher o/w separation of the ASP-produced emulsion. The overall increase in the o/w separation was recorded to be 19% in the presence of TiO2 nanoparticles, indicating a decrease in the stability of ASP-produced emulsion. This decrease in the stability can be attributed to the improved coalescence’ action between the adjacent oil droplets and improved behavior of o/w interfacial film. An observable difference was found between the oil droplet size before and after the addition of TiO2 nanoparticles, where the oil droplet size increased from 3 µm to 35 µm. A similar trend of zeta potential is also noticed in the presence of TiO2 nanoparticles. Zeta potential was −13 mV to −7 mV, which is in the unstable emulsion range. Overall, the o/w separation is enhanced by introducing TiO2 nanoparticles into ASP-produced stable emulsion.

ACS Style

Mohammad Khan; Javed Khan; Habib Ullah; Hussain Al-Kayiem; Sonny Irawan; Muhammad Irfan; Adam Glowacz; Hui Liu; Witold Glowacz; Saifur Rahman. De-Emulsification and Gravity Separation of Micro-Emulsion Produced with Enhanced Oil Recovery Chemicals Flooding. Energies 2021, 14, 2249 .

AMA Style

Mohammad Khan, Javed Khan, Habib Ullah, Hussain Al-Kayiem, Sonny Irawan, Muhammad Irfan, Adam Glowacz, Hui Liu, Witold Glowacz, Saifur Rahman. De-Emulsification and Gravity Separation of Micro-Emulsion Produced with Enhanced Oil Recovery Chemicals Flooding. Energies. 2021; 14 (8):2249.

Chicago/Turabian Style

Mohammad Khan; Javed Khan; Habib Ullah; Hussain Al-Kayiem; Sonny Irawan; Muhammad Irfan; Adam Glowacz; Hui Liu; Witold Glowacz; Saifur Rahman. 2021. "De-Emulsification and Gravity Separation of Micro-Emulsion Produced with Enhanced Oil Recovery Chemicals Flooding." Energies 14, no. 8: 2249.

Journal article
Published: 26 March 2021 in Chemical Engineering Science
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Precise prediction of the gas–liquid slug flow is crucial for proper design and operation at various industrial processes. This paper provides a comprehensive review of published experimental and numerical works in horizontal pipes, including a critical analysis of state-of-the-art parameters used to characterize the slug flow regime. The discussed slug characteristics are slug length, slug frequency, and slug velocity. Throughout the paper, an endeavor does devote to discerning the areas where modern development work is needed. Accordingly, some observed gaps in the literature, comprising hydrodynamic behavior at the transition zone and the interaction between slug flow and structural pipe. The lack of comprehensive laboratory experimental information for high liquid viscosity and the viscosity impact on the slug characteristic is also observed. On the contrary, robust and less empirically independent CFD models are required for accurately predicting the slug characteristics with a minimal computational cost.

ACS Style

Abdalellah O. Mohmmed; Hussain H. Al-Kayiem; A.B. Osman. Investigations on the slug two-phase flow in horizontal pipes: Past, presents, and future directives. Chemical Engineering Science 2021, 238, 116611 .

AMA Style

Abdalellah O. Mohmmed, Hussain H. Al-Kayiem, A.B. Osman. Investigations on the slug two-phase flow in horizontal pipes: Past, presents, and future directives. Chemical Engineering Science. 2021; 238 ():116611.

Chicago/Turabian Style

Abdalellah O. Mohmmed; Hussain H. Al-Kayiem; A.B. Osman. 2021. "Investigations on the slug two-phase flow in horizontal pipes: Past, presents, and future directives." Chemical Engineering Science 238, no. : 116611.

Book chapter
Published: 02 December 2020 in Inverse Heat Conduction and Heat Exchangers
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Nanoadditives are a type of heat transfer enhancement techniques adopted in heat exchangers to improve the performance of industrial plants through improvement of the thermal properties of base fluids. Recently, various types of inserts with nanofluids are adopted to enhance the thermal performance of double pipe heat exchangers. In the current article, TiO2/water nanofluid with multiple twisted tape inserts was investigated as a hybrid enhancement technique of heat transfer in straight pipes. The investigations were carried out experimentally and numerically at Reynolds numbers varied from 5000 to 20,000. Using nanofluid with 0.1% TiO2 nanoparticles volume fraction demonstrated enhanced heat transfer with slight increase in pressure drop. Results are showing a maximum increase of 110.8% in Nusselt number in a tube fitted with quintuple twisted tape inserts with 25.2% increase in the pressure drop. However, as the article is representing a part of specified book on heat exchangers, the literature has been extended to provide sufficient background to the reader on the use of nanotech, twisted inserts, and hybrid of compound nanofluids and inserts to enhance heat transfer processes.

ACS Style

Hussain H. Al-Kayiem; Muna S. Kassim; Saud T. Taher. Applications of Compound Nanotechnology and Twisted Inserts for Enhanced Heat Transfer. Inverse Heat Conduction and Heat Exchangers 2020, 1 .

AMA Style

Hussain H. Al-Kayiem, Muna S. Kassim, Saud T. Taher. Applications of Compound Nanotechnology and Twisted Inserts for Enhanced Heat Transfer. Inverse Heat Conduction and Heat Exchangers. 2020; ():1.

Chicago/Turabian Style

Hussain H. Al-Kayiem; Muna S. Kassim; Saud T. Taher. 2020. "Applications of Compound Nanotechnology and Twisted Inserts for Enhanced Heat Transfer." Inverse Heat Conduction and Heat Exchangers , no. : 1.

Review
Published: 02 November 2020 in Sustainability
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Emerging nanotechnology with solar collector technology has attracted the attention of researchers to enhance the performance of solar systems in order to develop efficient solar thermal systems for future sustainability. This paper chronologically reviews the various research works carried out on the performance enhancement of nanofluid-filled flat-plate solar collectors (FPCs). Gaps in the radiation exergy models and maximum exergy of FPCs, the importance of pressure drops in collector manifolds in exergy analysis, and the economics of nanofluid-laden FPCs have been addressed. The necessity of replacing currently used chemically derived glycol products with a renewable-based glycol has not been reported in the current literature thoroughly, but it is pondered in the current paper. Moreover, the thermophysical properties of all common metal and metal oxide nanoparticles utilized in various studies are collected in this paper for the first time and can be referred to quickly as a data source for future studies. The different classical empirical correlations for the estimation of specific heat, density, conductivity, and viscosity of reported nanofluids and base liquids, i.e., water and its mixture with glycols, are also tabulated as a quick reference. Brief insights on different performance criteria and the utilized models of heat transfer, energy efficiency, exergy efficiency, and economic calculation of nanofluid-based FPCs are extracted. Most importantly, a summary of the current progress in the field of nanofluid-charged FPCs is presented appropriately within two tables. The tables contain the status of the main parameters in different research works. Finally, gaps in the literature are addressed and mitigation approaches are suggested for the future sustainability of nanofluid-laden FPCs.

ACS Style

Seyed Shamshirgaran; Hussain Al-Kayiem; Korada Sharma; Mostafa Ghasemi. State of the Art of Techno-Economics of Nanofluid-Laden Flat-Plate Solar Collectors for Sustainable Accomplishment. Sustainability 2020, 12, 9119 .

AMA Style

Seyed Shamshirgaran, Hussain Al-Kayiem, Korada Sharma, Mostafa Ghasemi. State of the Art of Techno-Economics of Nanofluid-Laden Flat-Plate Solar Collectors for Sustainable Accomplishment. Sustainability. 2020; 12 (21):9119.

Chicago/Turabian Style

Seyed Shamshirgaran; Hussain Al-Kayiem; Korada Sharma; Mostafa Ghasemi. 2020. "State of the Art of Techno-Economics of Nanofluid-Laden Flat-Plate Solar Collectors for Sustainable Accomplishment." Sustainability 12, no. 21: 9119.

Review
Published: 15 October 2020 in Sustainability
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Greenery systems are sustainable ecosystems for buildings. Many studies on greenery systems, such as green roofs and green walls, have demonstrated that greenery systems support energy saving and improve thermal conditions in the building sector. This paper summarizes, discusses, and compares greenery systems and their contributions to the reduction of the urban heat index, the reduction of internal and external buildings’ wall temperatures, and the reduction of the energy consumption of buildings. The fundamental mechanisms of greenery systems, which are thermal insulation, evapotranspiration, and shading effect, are also discussed. The benefits of greenery systems include the improvement of stormwater management, the improvement of air quality, the reduction of sound pollution, the reduction of carbon dioxide, and the improvement of aesthetic building value. The summarized materials on the greenery systems in the article will be a point of references for the researchers, planners, and developers of urban and rural areas, as well as the individual’s interest for future urban and rural plans.

ACS Style

Hussain H. Al-Kayiem; Kelly Koh; Tri W. B. Riyadi; Marwan Effendy. A Comparative Review on Greenery Ecosystems and Their Impacts on Sustainability of Building Environment. Sustainability 2020, 12, 8529 .

AMA Style

Hussain H. Al-Kayiem, Kelly Koh, Tri W. B. Riyadi, Marwan Effendy. A Comparative Review on Greenery Ecosystems and Their Impacts on Sustainability of Building Environment. Sustainability. 2020; 12 (20):8529.

Chicago/Turabian Style

Hussain H. Al-Kayiem; Kelly Koh; Tri W. B. Riyadi; Marwan Effendy. 2020. "A Comparative Review on Greenery Ecosystems and Their Impacts on Sustainability of Building Environment." Sustainability 12, no. 20: 8529.

Journal article
Published: 25 June 2020 in Journal of Fluids and Structures
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Pipelines conveying a multiphase mixture must withstand the cyclic induced stresses that occur due to the alternating motion of gas pockets and liquid slugs. Few previous studies have considered gas–liquid slug flow and the associated fluid–structure interaction problems. In this study, experimental and numerical techniques were adopted to simulate and analyze the two-phase slug flow and the associated stresses in the pipe structure. In the numerical simulation, a one-way coupled fluid–structure framework was developed to explore the slug flow interaction with a horizontal pipe assembly under various superficial gas and liquid velocities. A modified Volume of Fluid and finite element methods were utilized to model the fluid and structure domains. The file-based coupling technique was adopted to execute the coupling mechanism. By contrast, slug characteristics were measured experimentally, while Bi-axial strain gauges were used to capture time-varying strain signals. Excellent agreements between the predicted and measured stress results were achieved with a maximum error of 10.2 %. It was found that at constant superficial liquid velocity, the maximum induced stresses on the pipe wall increased with increasing the slug length and slug velocity. While for the slug frequency, the maximum principal stresses decreased with increasing the slug frequency.

ACS Style

Abdalellah O. Mohmmed; Hussain H. Al-Kayiem; Osman A.B.; Osama Sabir. One-way coupled fluid–structure interaction of gas–liquid slug flow in a horizontal pipe: Experiments and simulations. Journal of Fluids and Structures 2020, 97, 103083 .

AMA Style

Abdalellah O. Mohmmed, Hussain H. Al-Kayiem, Osman A.B., Osama Sabir. One-way coupled fluid–structure interaction of gas–liquid slug flow in a horizontal pipe: Experiments and simulations. Journal of Fluids and Structures. 2020; 97 ():103083.

Chicago/Turabian Style

Abdalellah O. Mohmmed; Hussain H. Al-Kayiem; Osman A.B.; Osama Sabir. 2020. "One-way coupled fluid–structure interaction of gas–liquid slug flow in a horizontal pipe: Experiments and simulations." Journal of Fluids and Structures 97, no. : 103083.

Original paper production engineering
Published: 18 May 2020 in Journal of Petroleum Exploration and Production Technology
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Vane angle configuration is considerably affecting the internal flow behavior and separation performance of a concurrent axial inlet liquid–liquid hydrocyclone. This study was carried out to improve the design of the swirl generator by optimizing the vane’s deflection angle in an oil/water axial inlet hydrocyclone separator. Angles ranging from 37° to 75° were examined at various operational conditions, including mixture temperature, mixture flow rate, and water-to-oil ratio. Two analysis techniques have been coupled to achieve the aim. First, design of experiment by the response surface method was utilized to generate a combination of run/boundary conditions of swirler vane angles, inlet mixture temperatures, flow rates, and concentrations. The obtained 15 run/boundary conditions were adopted as cases for computational fluid dynamics simulation to determine the separation efficiency, tangential velocity and pressure drop of each case using ANSYS Fluent software. The optimization results show that the swirl generator with a 45° deflection angle generated slightly higher tangential velocity compared with higher and lower vane deflection angles. The separation efficiency obtained by using the 45° swirl generator was higher than other angles, in spite that the turbulence intensity is slightly higher at 45° compared to other vane angles.

ACS Style

Hussain H. Al-Kayiem; Jaseer E. Hamza; Tamiru A. Lemmu. Performance enhancement of axial concurrent liquid–liquid hydrocyclone separator through optimization of the swirler vane angle. Journal of Petroleum Exploration and Production Technology 2020, 10, 2957 -2967.

AMA Style

Hussain H. Al-Kayiem, Jaseer E. Hamza, Tamiru A. Lemmu. Performance enhancement of axial concurrent liquid–liquid hydrocyclone separator through optimization of the swirler vane angle. Journal of Petroleum Exploration and Production Technology. 2020; 10 (7):2957-2967.

Chicago/Turabian Style

Hussain H. Al-Kayiem; Jaseer E. Hamza; Tamiru A. Lemmu. 2020. "Performance enhancement of axial concurrent liquid–liquid hydrocyclone separator through optimization of the swirler vane angle." Journal of Petroleum Exploration and Production Technology 10, no. 7: 2957-2967.

Data article
Published: 16 May 2020 in Data in Brief
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The data in this article present the effective parameters of experimental ultrasonication process on the dispersion stability of graphene nanoplatelets (GNPs) grafted with a natural polymer of Gum Arabic (GA). These datasets are supporting the article “Natural Polymer Non-Covalently Grafted Graphene Nanoplatelets for Improved Oil Recovery Process: A Micromodel Evaluation” [1]. The datasets were gained during experiments conducted at various dwell time (30, 60, 90 and 120 min) at constant power amplitude (60%) of sonication for preparing the stable GA-GNP/brine solutions aiming cost-effective and green agent solution for chemical enhanced oil recovery (C-EOR). The GA-GNPs dispersion data was verified using particle size analyser and UV–Vis measurements. The optimized time and power amplitude parameters of the sonication process were utilized for preparing stabilized samples of GA grafted GNPs in regarding to research work on Natural Polymer Non-Covalently Grafted Graphene Nanoplatelets for EOR. The dispersion stability of GA-GNPs nanofluids at reservoir conditions of high salinity and high temperatures (HSHT) was further demonstrated in the measured data through the sedimentation of nanoparticles.

ACS Style

Sinan S. Hamdi; Hussain H. Al-Kayiem; Ali S. Muhsan; Elena Magaril. Experimental dataset on the dispersion stability of natural polymer non-covalently functionalized graphene nanoplatelets in high salinity brines. Data in Brief 2020, 31, 105702 .

AMA Style

Sinan S. Hamdi, Hussain H. Al-Kayiem, Ali S. Muhsan, Elena Magaril. Experimental dataset on the dispersion stability of natural polymer non-covalently functionalized graphene nanoplatelets in high salinity brines. Data in Brief. 2020; 31 ():105702.

Chicago/Turabian Style

Sinan S. Hamdi; Hussain H. Al-Kayiem; Ali S. Muhsan; Elena Magaril. 2020. "Experimental dataset on the dispersion stability of natural polymer non-covalently functionalized graphene nanoplatelets in high salinity brines." Data in Brief 31, no. : 105702.

Journal article
Published: 14 May 2020 in Energy Conversion and Management
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This paper presents analysis and optimization of standalone hybrid renewable energy system for powering a 3.032 kWh/day housing unit. The hybrid system is strategized to utilize harvesting rainfall and integrating a pumped-hydro storage with a solar photovoltaic-battery system. The optimization, using particle swarm optimization technique, is conceived for minimizing the over sizing of components and secure reliable power supply management with objective function to minimize the levelized cost of energy for loss of power supply probability of 0.0. Four different cases have been optimized, analyzed and compared. Case 1 is a conventional photovoltaic-battery system, Case 2 is photovoltaic-battery integrated with hydro system utilizing only the direct rainfall, Case 3 is photovoltaic-battery integrated with pumped-hydro storage system with the battery bank as the primary power backup, and Case 4 is the photovoltaic-battery integrated with pumped-hydro storage system with hydro system as the primary power backup. Results are revealing that integration of rainfall-based hydropower system of only 100 W with effective water storage of 6.5 m3 at 7.0 m of net water head has resulted in reduction of the installed photovoltaic capacity by about 13.0% compared to power system without rainfall-based hydropower system. The highest hydropower share of 5.0% is observed in Case 4. Case 4 has also resulted in least levelized cost of energy of 0.443 $/kWh. It has been demonstrated that it is possible to achieve environmental appropriateness, reliable and low-cost power generation by integration of harvesting rainfall with photovoltaic-battery system. The suggested system has less dependency on the battery storage as the batteries are the most expensive part with short life span in the proposed integrated renewable systems.

ACS Style

Bilawal A. Bhayo; Hussain H. Al-Kayiem; Syed I.U. Gilani; Firas B. Ismail. Power management optimization of hybrid solar photovoltaic-battery integrated with pumped-hydro-storage system for standalone electricity generation. Energy Conversion and Management 2020, 215, 112942 .

AMA Style

Bilawal A. Bhayo, Hussain H. Al-Kayiem, Syed I.U. Gilani, Firas B. Ismail. Power management optimization of hybrid solar photovoltaic-battery integrated with pumped-hydro-storage system for standalone electricity generation. Energy Conversion and Management. 2020; 215 ():112942.

Chicago/Turabian Style

Bilawal A. Bhayo; Hussain H. Al-Kayiem; Syed I.U. Gilani; Firas B. Ismail. 2020. "Power management optimization of hybrid solar photovoltaic-battery integrated with pumped-hydro-storage system for standalone electricity generation." Energy Conversion and Management 215, no. : 112942.

Journal article
Published: 21 April 2020 in Journal of Molecular Liquids
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Low stability of the colloidal suspension and the agglomeration phenomena of nanoparticles are the main challenges that restrict nanofluid applications in enhanced oil recovery at reservoir conditions. In this study, graphene nanoplatelets (GNPs) grafted with Gum Arabic (GA) were successfully prepared and evaluated as a cost-effective agent for chemically enhanced oil recovery. The physical and morphological properties of the GA-grafted GNPs (GA-GNPs) were characterized using Fourier transform-infrared spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, thermal gravimetric analysis, and transmission electron microscope. GA-GNP powder was prepared and dispersed in high-salinity brine of 30,000 ppm as the base fluid with concentrations of 0.01, 0.05, and 0.1 mg/ml. Investigation results showed that the developed nanofluids exhibited good stability at high salinity and temperature. A reduction in the value of oil–brine interfacial tension (IFT) by 61.0% in the presence of GA-GNPs was observed. The contact angle was remarkably changed from 108° to 20° (81.0% reduction) after dispersing 0.05 mg/mL of GA-GNPs in the brine, which indicates that the wettability of glass slices was altered from oil- to water-wet. After flooding GA-GNP-based brine in the glass micromodel, an augmentation in the oil recovery of approximately 15% and 19% was observed for 0.01 and 0.05 mg/ml of GA-GNPs, respectively. Hence, the wettability alteration plays a more important and effective role than IFT in improving oil recovery with even ultralow concentrations of GA-GNPs. The viscosity of the brine was remarkably improved by 63% after adding 0.05 mg/ml of the prepared GA-GNP powder, which in turn reduced the fingering phenomena during flooding noticeably. These findings indicate that the GA-GNP-based nanofluids can significantly improve the mobility of the residual oil from the porous media to the production well with high efficiency of oil displacement at reservoir conditions.

ACS Style

Sinan S. Hamdi; Hussain H. Al-Kayiem; Ali Muhsan. Natural polymer non-covalently grafted graphene nanoplatelets for improved oil recovery process: A micromodel evaluation. Journal of Molecular Liquids 2020, 310, 113076 .

AMA Style

Sinan S. Hamdi, Hussain H. Al-Kayiem, Ali Muhsan. Natural polymer non-covalently grafted graphene nanoplatelets for improved oil recovery process: A micromodel evaluation. Journal of Molecular Liquids. 2020; 310 ():113076.

Chicago/Turabian Style

Sinan S. Hamdi; Hussain H. Al-Kayiem; Ali Muhsan. 2020. "Natural polymer non-covalently grafted graphene nanoplatelets for improved oil recovery process: A micromodel evaluation." Journal of Molecular Liquids 310, no. : 113076.

Conference paper
Published: 17 March 2020 in IOP Conference Series: Materials Science and Engineering
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The turbulence structure in air intake S-shaped diffuser is proven to be influencing parameter on the diffuser performance. In the present research work, experimental and numerical investigations have been undertaken to explore the effect of inlet turbulence intensity level on the performance of air intake S-shaped diffuser. Detailed measurements including pressure and velocity at the inlet and outlet planes and static pressure on the top and bottom walls were taken at three pre-selected Reynolds numbers of 4.8×104, 6.4×104 and 7.5×104. The predicted corresponding turbulence intensities at the experimented three Re, were 4.16%, 3.15% and 2.8%. ANSYS-FLUENT 15 software with Standard k-ε turbulence model has been used for numerical simulations. Numerical results of static pressure recovery, total pressure loss coefficient and wall static pressure recovery have been compared with the experimental results. The experimental results indicate that increasing Reynolds number at the inlet of S-shaped diffuser resulting in slight decrease in measured turbulence intensity. Also, as Re increased from 4.8x104 to 7.5x104, the static pressure recovery increased by 9% and the total pressure loss coefficient was reduced by 4.9%.

ACS Style

Raed Jessam; Hussain H. Al-Kayiem; Mohammad S. Nasif; Ameer Abed Jaddoa AlBuali. Experimental and Numerical Assessment on S-shaped Diffuser performance with different Turbulence Intensity. IOP Conference Series: Materials Science and Engineering 2020, 765, 1 .

AMA Style

Raed Jessam, Hussain H. Al-Kayiem, Mohammad S. Nasif, Ameer Abed Jaddoa AlBuali. Experimental and Numerical Assessment on S-shaped Diffuser performance with different Turbulence Intensity. IOP Conference Series: Materials Science and Engineering. 2020; 765 ():1.

Chicago/Turabian Style

Raed Jessam; Hussain H. Al-Kayiem; Mohammad S. Nasif; Ameer Abed Jaddoa AlBuali. 2020. "Experimental and Numerical Assessment on S-shaped Diffuser performance with different Turbulence Intensity." IOP Conference Series: Materials Science and Engineering 765, no. : 1.

Short communication
Published: 18 January 2020 in Case Studies in Thermal Engineering
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Potential solar data are an essential tool for successful solar design and application. However, because of the limited availability of solar radiation stations, spatial resolution is affected whenever an attempt to construct a solar radiation map is made. In this paper, actual solar data were acquired in Universiti Teknologi PETRONAS (UTP), Seri Iskandar, Malaysia (4°24′latitude, 100°58′E longitude, 24 m altitude). The measurements of global solar radiation and direct normal radiation were gathered and analyzed for the whole of 2018. In addition to solar data collection, real-time solar radiation, high accuracy, and related meteorological data were also obtained. With 1-min recorded average values the everyday and monthly solar radiation averages were determined. A record of 1068.10 W/m2 as maximum daily global solar radiation and 915 W/m2 for direct normal radiation was observed on 9 September 2018. Discussions on daily and monthly average clearness index differences are also elaborated in this paper. The acquired data were compared with corresponding data obtained from other selected Malaysian cities and the widely useable data resource, the NASA solar energy model and surface meteorology. Investigation of the data indicated that Seri Iskandar obtains an ample amount of global solar radiation, indicating the strong potential for the use of solar energy.

ACS Style

Sanan T. Mohammad; Hussain H. Al-Kayiem; Mohammed A. Aurybi; Ayad K. Khlief. Measurement of global and direct normal solar energy radiation in Seri Iskandar and comparison with other cities of Malaysia. Case Studies in Thermal Engineering 2020, 18, 100591 .

AMA Style

Sanan T. Mohammad, Hussain H. Al-Kayiem, Mohammed A. Aurybi, Ayad K. Khlief. Measurement of global and direct normal solar energy radiation in Seri Iskandar and comparison with other cities of Malaysia. Case Studies in Thermal Engineering. 2020; 18 ():100591.

Chicago/Turabian Style

Sanan T. Mohammad; Hussain H. Al-Kayiem; Mohammed A. Aurybi; Ayad K. Khlief. 2020. "Measurement of global and direct normal solar energy radiation in Seri Iskandar and comparison with other cities of Malaysia." Case Studies in Thermal Engineering 18, no. : 100591.

Journal article
Published: 14 November 2019 in Solar Energy
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This study presents a developed assessment methodology for Photovoltaic-Battery power system featured with utilization of the dumbed power for secondary applications such as water pumping. Primary target is to meet the demand of 3.2 kWh/day for rural housing unit. The PV-Battery system size is determined by varying the number of PV’s and Battery capacity. At each configuration, having the Loss of Power Supply Probability of 0, the Levelized Cost of Energy is determined. It has been revealed that the number of PV panels are depending on a day with lowest solar irradiations. However, the required battery storage is contingent on the maximum number of hours the battery is required to supply power to the load. In the present study, the battery can supply power for maximum of 16 h such as starting from 4:00 PM to 7:00 AM next day. The selected size of PV-Battery system to meet the load demand of 3.2 kWh/day and utilize the excess power for water pumping consists of 2.44 kWp of PV’s and 3.55 kWh of installed battery capacity. The selected power system generates an average 9.807 kWh/day and provides the water pumping of 363 m3/day. The power yield in peak hours and Levelized Cost of Energy are 58.6% and 0.3750 $/kWh, respectively. It is reviled that the excess power is unavoidable, and it is recommended to be utilized for water pumping. If the water is pumped to elevated storage, it may be used for extra hydro power generation by hybrid PV-Battery-Hydro power.

ACS Style

Bilawal A. Bhayo; Hussain H. Al-Kayiem; Syed I. Gilani. Assessment of standalone solar PV-Battery system for electricity generation and utilization of excess power for water pumping. Solar Energy 2019, 194, 766 -776.

AMA Style

Bilawal A. Bhayo, Hussain H. Al-Kayiem, Syed I. Gilani. Assessment of standalone solar PV-Battery system for electricity generation and utilization of excess power for water pumping. Solar Energy. 2019; 194 ():766-776.

Chicago/Turabian Style

Bilawal A. Bhayo; Hussain H. Al-Kayiem; Syed I. Gilani. 2019. "Assessment of standalone solar PV-Battery system for electricity generation and utilization of excess power for water pumping." Solar Energy 194, no. : 766-776.

Journal article
Published: 30 October 2019 in Energies
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Compound parabolic concentrating (CPC) collectors have great potential to provide sustainable solar thermal energy for many applications operating in the medium temperature range. This paper presents the design, development and performance evaluation of a modified CPC collector integrated with an evacuated tube receiver. The optical performance of the designed CPC paired with concentric tube receiver is compared with that of a CPC coupled with single flow through evacuated tube receiver for stationary installation in the East-West and North-South directions. Ray tracing simulations of different configurations demonstrate that CPC coupled with single flow through receivers suffer high gap losses, especially at smaller incidence angles which are considerably alleviated by a concentric tube receiver arrangement. East-West installation of CPC paired with concentric tube receiver exhibited superior optical performance than all other configurations. The yearly average optical efficiency of CPC with concentric tube receiver was 5% higher than that of a single flow through receiver within the acceptance angle. A 60% truncated CPC coupled with concentric tube receiver emerged as the most effective design, which was fabricated for experimental testing. The tests conducted under actual outdoor tropical environmental conditions demonstrated that the experimental optical efficiency reached to about 69% in the case of N-S installation and 66.5% in an E-W arrangement. The experimental results closely match the simulation outcomes, which indicate the proposed performance prediction technique as instrumental for selecting the most effective configuration of CPC collectors for medium temperature heat supply.

ACS Style

Javed Akhter; Syed I. Gilani; Hussain H. Al-Kayiem; Muzaffar Ali; Al- Kayiem; Ali. Optical Performance Analysis of Single Flow Through and Concentric Tube Receiver Coupled with a Modified CPC Collector Under Different Configurations. Energies 2019, 12, 4147 .

AMA Style

Javed Akhter, Syed I. Gilani, Hussain H. Al-Kayiem, Muzaffar Ali, Al- Kayiem, Ali. Optical Performance Analysis of Single Flow Through and Concentric Tube Receiver Coupled with a Modified CPC Collector Under Different Configurations. Energies. 2019; 12 (21):4147.

Chicago/Turabian Style

Javed Akhter; Syed I. Gilani; Hussain H. Al-Kayiem; Muzaffar Ali; Al- Kayiem; Ali. 2019. "Optical Performance Analysis of Single Flow Through and Concentric Tube Receiver Coupled with a Modified CPC Collector Under Different Configurations." Energies 12, no. 21: 4147.

Original paper production engineering
Published: 21 May 2019 in Journal of Petroleum Exploration and Production Technology
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With many of today’s oil wells located offshore, the production of high volumes of water compared to oil poses major challenges to oil operators. The use of liquid–liquid hydrocyclone (LLHC) is one effective way to arrest these uphill problems of produced water. However, the nature of fluid flow within the LLHC device is very vital to the separation process and performance. This study through numerical simulation lends understanding to the way oil–water fluid migrates within LLHC device and shows how the flow structure can affect the efficiency of the separation process. Unsteady wavering flow was realized for the use of the single inlet due to flow imbalance just after entry into the cyclone. This affected the efficiency of separation as water droplets in the vicinity of the reverse flow core boundary could be carried to the overflow. In addition, there was the realization of frequent recirculation zones which cause some fluid droplets to be unseparated. Uniform unwavering fluid flow structure was observed in the case of dual inlet LLHC which assisted in the segregation of the oil and water into their respective core regions as oil-rich core (inner) and water-rich core (outer). The separation efficiency achieved from the use of the dual inlet LLHC outperformed that from the single inlet LLHC. An efficiency of 82.3% was obtained for the dual inlet LLHC as against 73.7% for the single inlet LLHC at 0.5 m3/h. At 1.0 m3/h, a great separation performance of 93.6% was achieved from the dual inlet LLHC, whereas separation efficiency of 88.5% was obtained when the same feed was treated in the single inlet LLHC.

ACS Style

Hussain H. Al-Kayiem; Harrison Osei; Fakhruldin M. Hashim; Jaseer E. Hamza. Flow structures and their impact on single and dual inlets hydrocyclone performance for oil–water separation. Journal of Petroleum Exploration and Production Technology 2019, 9, 2943 -2952.

AMA Style

Hussain H. Al-Kayiem, Harrison Osei, Fakhruldin M. Hashim, Jaseer E. Hamza. Flow structures and their impact on single and dual inlets hydrocyclone performance for oil–water separation. Journal of Petroleum Exploration and Production Technology. 2019; 9 (4):2943-2952.

Chicago/Turabian Style

Hussain H. Al-Kayiem; Harrison Osei; Fakhruldin M. Hashim; Jaseer E. Hamza. 2019. "Flow structures and their impact on single and dual inlets hydrocyclone performance for oil–water separation." Journal of Petroleum Exploration and Production Technology 9, no. 4: 2943-2952.