This page has only limited features, please log in for full access.
Dr Al Qubeissi is a Chartered Engineer, Fellow of the Higher Education Academy, member of UnICEG, IAENG –ISME, IMechE and the Institute for Future Transport and Cities, and Senior Lecturer and Course Director for Master of Engineering programmes at CU. Prior to that role, he was a Lecturer in engineering at the University of Brighton, UK. He is experienced in computational thermo-fluids, biofuels and energy systems. His other relevant expertise includes turbine combustion, PV/T and battery thermal management. His research efforts have been disseminated via dozens of publications in high impact refereed journals, conference proceedings and books. Dr Al Qubeissi has been involved in leading dozens of research projects and PhD theses.
Vehicle driveability is one of the important vehicle attributes in range-extender electric vehicles due to the electric motor torque characteristics at low-speed events. The process of validating and rectifying vehicle driveability attributes is typically utilised by a physical vehicle prototype that can be expensive and required several design iterations. In this paper, a model-based energy method to assess vehicle driveability is presented based on a high-fidelity 49 degree-of-freedom powertrain and vehicle systems. Multibody dynamics components were built according to their true centre of gravity relative to the vehicle datum for providing an accurate system interaction. The work covered a frequency at less than 20 Hz. The results that consisted of the component frequency domination are structured and examined to identify the low-frequency sensitivity based on different operating parameters such as a road surface coefficient. An energy path technique was also implemented on the dominant component by decoupling its compliances to study the effect on the vehicle driveability and low-frequency response. The outcomes of the research provided a good understanding of the interaction across the sub-systems levels. The powertrain rubber mounts were the dominant components that controlled the low-frequency contents (< 15.33 Hz) and can change the vehicle driveability quality.
Raja Mazuir Raja Ahsan Shah; R. Peter Jones; Caizhen Cheng; Alessandro Picarelli; Abd Rashid Abd Aziz; Mansour Al Qubeissi. Model-based Energy Path Analysis of Tip-in Maneuvers in a 2WD Vehicle with Range-extender Electric Powertrain Architecture. 2021, 1 .
AMA StyleRaja Mazuir Raja Ahsan Shah, R. Peter Jones, Caizhen Cheng, Alessandro Picarelli, Abd Rashid Abd Aziz, Mansour Al Qubeissi. Model-based Energy Path Analysis of Tip-in Maneuvers in a 2WD Vehicle with Range-extender Electric Powertrain Architecture. . 2021; ():1.
Chicago/Turabian StyleRaja Mazuir Raja Ahsan Shah; R. Peter Jones; Caizhen Cheng; Alessandro Picarelli; Abd Rashid Abd Aziz; Mansour Al Qubeissi. 2021. "Model-based Energy Path Analysis of Tip-in Maneuvers in a 2WD Vehicle with Range-extender Electric Powertrain Architecture." , no. : 1.
Increasing travel demand, incomplete combustion of fuel in an engine, vehicle exhaust emissions such as NOx, CO and particular matter and global warming urge the fuel modification methods by using nano additives and alternative fuel. Suitable preparation method, characterization and fuel additive application of nickel-copper-carbide nanocomposite (Ni–CuC NC) have been rarely reported due to lack of research. On this ground, the present research illustrated the synthesis of nickel-copper bimetallic nanoparticles (Ni–Cu BNPs) with copper chloride (CuCl2) and nickel nitrate (Ni(NO3)2·6H2O) salt precursors in the presence of sodium hydroxide (NaOH). Followed by the reinforcement of calcium carbide (CaC2) with Ni–Cu BNPs to prepare Ni–CuC nanocomposite via hydrothermal approach. Structural composition and morphological analysis of the Ni–CuC nanocomposite was studied by XRD and SEM respectively. Physical and combustion fuel properties were investigated at 20, 40, 60 and 80 ppm concentration of Ni–Cu BNPs and Ni–CuC nanocomposite respectively for fuel-efficiency. Flash and fire point of diesel fuel in the absence of additives was observed as 78 and 82 °C respectively. Whereas, 80 ppm fuel blend of Ni–CuC and Ni–Cu show a remarkable decrease in flash point up to 69 and 72 °C respectively. The decreasing trend for fire point observed up to 72 and 74 °C respectively. A tremendous recorded decrease in kinematic viscosity was 1.51 and 1.75 m2/s with Ni–CuC and Ni–Cu. Ni–Cu BNPs and Ni–CuC nanocomposite in term of fuel efficiency and environment friendly emission could be recognized as potential candidates in diesel. Future work on Ni–Cu BNPs and Ni–CuC nanocomposite as fuel additives for enhancing fuel or biofuel parameters as a photocatalyst for various dye removal in wastewater treatment, as sensing agent in sensing technology as well as for chemical reaction catalysis could be encouraged.
Sana Rasheed; Farooq Sher; Tahir Rasheed; Saba Sehar; Mansour Al Qubeissi; Fatima Zafar; Eder C. Lima. Hydrothermally engineered Ni–CuC hybrid nanocomposites: Structural and morphological investigations with potential fuel catalytic applications. Materials Chemistry and Physics 2021, 270, 124837 .
AMA StyleSana Rasheed, Farooq Sher, Tahir Rasheed, Saba Sehar, Mansour Al Qubeissi, Fatima Zafar, Eder C. Lima. Hydrothermally engineered Ni–CuC hybrid nanocomposites: Structural and morphological investigations with potential fuel catalytic applications. Materials Chemistry and Physics. 2021; 270 ():124837.
Chicago/Turabian StyleSana Rasheed; Farooq Sher; Tahir Rasheed; Saba Sehar; Mansour Al Qubeissi; Fatima Zafar; Eder C. Lima. 2021. "Hydrothermally engineered Ni–CuC hybrid nanocomposites: Structural and morphological investigations with potential fuel catalytic applications." Materials Chemistry and Physics 270, no. : 124837.
The modelling of droplet heating, evaporation and combustion processes is crucial to the design and advancement of combustors (Al Qubeissi in Appl Therm Eng 136(C):260–267, 2018 [1]; Sazhin in Droplets and sprays. Springer, London, 2014 [2]), and essential to the assessment of suitability of fuel (Jones and Balster in Energy Fuels 11:610–614, 1997 [3]). In this study, we have conducted a detailed analysis of kerosene fuel droplet heating and evaporation, using the previously developed discrete component model (DCM).
Mansour Al Qubeissi; Geng Wang; Nawar Al-Esawi; Oyuna Rybdylova; Sergei S. Sazhin. CFD Modelling of Gas-Turbine Fuel Droplet Heating, Evaporation and Combustion. Advances in Heat Transfer and Thermal Engineering 2021, 197 -201.
AMA StyleMansour Al Qubeissi, Geng Wang, Nawar Al-Esawi, Oyuna Rybdylova, Sergei S. Sazhin. CFD Modelling of Gas-Turbine Fuel Droplet Heating, Evaporation and Combustion. Advances in Heat Transfer and Thermal Engineering. 2021; ():197-201.
Chicago/Turabian StyleMansour Al Qubeissi; Geng Wang; Nawar Al-Esawi; Oyuna Rybdylova; Sergei S. Sazhin. 2021. "CFD Modelling of Gas-Turbine Fuel Droplet Heating, Evaporation and Combustion." Advances in Heat Transfer and Thermal Engineering , no. : 197-201.
In the interest of minimising the amount of work required to enhance thermal separation, a passively induced thermal separation has been investigated. This work is motivated by the recently introduced mechanism of Azanov and Osiptsov. Two methods of reducing the adiabatic wall temperatures have been proposed. First is a modification to the de Laval nozzle from single to dual and triple supersonic nozzles to reduce the degree of aerodynamic heating at the supersonic channel walls. The latter is conducted with a separation to the supersonic flow regime into three parallel interfacing flow sub-regimes. Second is the introduction of water droplets into the supersonic flow channel to absorb the evaporation latent heat equivalent energy. The droplet evaporation has shown a noticeable enhancement in the cooling effects with up to 8 ℃ temperature drops. The model has been compared to the experimental data for compatible results.
Chidiebere Ihekwaba; Mansour Al Qubeissi. A Parametric Study into a Passively Enhanced Heat Separation System. Advances in Heat Transfer and Thermal Engineering 2021, 265 -269.
AMA StyleChidiebere Ihekwaba, Mansour Al Qubeissi. A Parametric Study into a Passively Enhanced Heat Separation System. Advances in Heat Transfer and Thermal Engineering. 2021; ():265-269.
Chicago/Turabian StyleChidiebere Ihekwaba; Mansour Al Qubeissi. 2021. "A Parametric Study into a Passively Enhanced Heat Separation System." Advances in Heat Transfer and Thermal Engineering , no. : 265-269.
Photovoltaic systems have undergone substantial growth for the past twenty years and more than 75% of the solar irradiance is absorbed, but only a small amount of the captured solar energy (e.g. 7–24%) is transformed into electricity. The remaining energy can cause overheating and damage to adhesive seals, delamination and non-homogeneous temperatures. In this paper a three-step strategy is presented for the development of an energy efficient hybrid photovoltaic/thermal air system by the combination of experimentally validated computation fluid dynamics and optimal Latin hypercubes design of experiments. The combined thermo-hydraulic and electrical performances of five air flow configurations are examined after the selection of several design parameters. The parametric study reveals that the most promising configuration is co-current air flow through two channels above and below the photovoltaic cell. A multi-objective design optimisation process is undertaken for this configuration, where the system is represented by three design variables: the collector, the depths of the lower air flow and the upper air flow channels. A 50-point design of experiments is constructed within the design variables space using a permutation genetic algorithm. The multi-objective design optimisation methodology entails an accurate surrogate modelling to create Pareto curves which demonstrate clearly the compromises that may be taken between fan fluid and electric powers, and between the electric and thermal efficiencies. The design optimisation demonstrates how the design variables affect each of the four system performance parameters. The thermal and electric efficiencies are improved from 44.5% to 50.1% and from 10.0% to 10.5%, respectively.
Moustafa Al-Damook; Zinedine Khatir; Mansour Al Qubeissi; Darron Dixon-Hardy; Peter J. Heggs. Energy efficient double-pass photovoltaic/thermal air systems using a computational fluid dynamics multi-objective optimisation framework. Applied Thermal Engineering 2021, 194, 117010 .
AMA StyleMoustafa Al-Damook, Zinedine Khatir, Mansour Al Qubeissi, Darron Dixon-Hardy, Peter J. Heggs. Energy efficient double-pass photovoltaic/thermal air systems using a computational fluid dynamics multi-objective optimisation framework. Applied Thermal Engineering. 2021; 194 ():117010.
Chicago/Turabian StyleMoustafa Al-Damook; Zinedine Khatir; Mansour Al Qubeissi; Darron Dixon-Hardy; Peter J. Heggs. 2021. "Energy efficient double-pass photovoltaic/thermal air systems using a computational fluid dynamics multi-objective optimisation framework." Applied Thermal Engineering 194, no. : 117010.
A new algorithm for the auto-selection of quasi-components and components (QC/Cs) in the ‘multi-dimensional quasi-discrete’ model is suggested. This algorithm is applied to the analysis of heating and evaporation of multi-component fuel droplets. It allows one to automatically select QC/Cs and update the initial selection during droplet evaporation. The new algorithm is expected to be applicable to the analysis of a wide range of fuels and fuel blends. It can be directly implemented into CFD codes with minimal intervention by end-user. Using this algorithm, the effects of transient diffusion of species on droplet lifetimes are investigated for mixtures of Diesel and E85 (85% vol. ethanol and 15% vol. gasoline) fuels. It is shown that the new algorithm can reduce the analysis of the E85-Diesel fuel droplets, taking into account the contributions of up to 119 components at the initial stage of heating and evaporation, to that based on 5 QC/Cs, near the end of droplet evaporation, with up to 1.9% errors in predicted droplet temperatures and radii. The CPU time needed to perform calculations using the new algorithm is shown to be 80% less than that when considering the full composition of fuel.
Mansour Al Qubeissi; Nawar Al-Esawi; Sergei S. Sazhin. Auto-selection of quasi-components/components in the multi-dimensional quasi-discrete model. Fuel 2021, 294, 120245 .
AMA StyleMansour Al Qubeissi, Nawar Al-Esawi, Sergei S. Sazhin. Auto-selection of quasi-components/components in the multi-dimensional quasi-discrete model. Fuel. 2021; 294 ():120245.
Chicago/Turabian StyleMansour Al Qubeissi; Nawar Al-Esawi; Sergei S. Sazhin. 2021. "Auto-selection of quasi-components/components in the multi-dimensional quasi-discrete model." Fuel 294, no. : 120245.
Energy is essential for the nature of life and the development of countries. The main demand for the 21st century is to fulfill growing energy needs. Pakistan, through the use of fossil fuels, meets energy demands. There is pressure on the economy of the country due to the massive reliance on fossil fuels, and this tendency is influenced by various environmental impacts. To overcome the burden on fossil fuels, more attention has been drawn to provide fossil fuel substitution. Tire pyrolysis is among the effective substitutes of the fuel technology that generates useful products of liquid oil, char, and pyro gas. This research focuses on the environmental, social, and economic viability of tire pyrolysis oil in Pakistan. This study estimates the production and potential of tire pyrolysis oil (TPO) in Pakistan. Based on the calculations, the potential of tire pyrolysis oil production in Pakistan from 2015–2019 is 468,081 to 548,406 tons. The potential production of TPO in 2018–2019 was ~8.30% of the total import (6.6 million tons) of crude oil. Therefore, tire pyrolysis oil is considered an alternative fuel representing an economic and environmentally viability solution for Pakistan.
Haseeb Yaqoob; Yew Teoh; Farooq Sher; Muhammad Jamil; Daniyal Murtaza; Mansour Al Qubeissi; Mehtab Ui Hassan; M. Mujtaba. Current Status and Potential of Tire Pyrolysis Oil Production as an Alternative Fuel in Developing Countries. Sustainability 2021, 13, 3214 .
AMA StyleHaseeb Yaqoob, Yew Teoh, Farooq Sher, Muhammad Jamil, Daniyal Murtaza, Mansour Al Qubeissi, Mehtab Ui Hassan, M. Mujtaba. Current Status and Potential of Tire Pyrolysis Oil Production as an Alternative Fuel in Developing Countries. Sustainability. 2021; 13 (6):3214.
Chicago/Turabian StyleHaseeb Yaqoob; Yew Teoh; Farooq Sher; Muhammad Jamil; Daniyal Murtaza; Mansour Al Qubeissi; Mehtab Ui Hassan; M. Mujtaba. 2021. "Current Status and Potential of Tire Pyrolysis Oil Production as an Alternative Fuel in Developing Countries." Sustainability 13, no. 6: 3214.
An improved heating and evaporation model of fuel droplets is implemented into the commercial Computational Fluid Dynamics (CFD) software CONVERGE for the simulation of sprays. The analytical solutions to the heat conduction and species diffusion equations in the liquid phase for each time step are coded via user-defined functions (UDF) into the software. The customized version of CONVERGE is validated against measurements for a single droplet of n-heptane and n-decane mixture. It is shown that the new heating and evaporation model better agrees with the experimental data than those predicted by the built-in heating and evaporation model, which does not consider the effects of temperature gradient and assumes infinitely fast species diffusion inside droplets. The simulation of a hollow-cone spray of primary reference fuel (PRF65) is performed and validated against experimental data taken from the literature. Finally, the newly implemented model is tested by running full-cycle engine simulations, representing partially premixed compression ignition (PPCI) using PRF65 as the fuel. These simulations are successfully performed for two start of injection timings, 20 and 25 crank angle (CA) before top-dead-centre (BTDC). The results show good agreement with experimental data where the effect of heating and evaporation of droplets on combustion phasing is investigated. The results highlight the importance of the accurate modelling of physical processes during droplet heating and evaporation for the prediction of the PPCI engine performance.
Islam Kabil; Mansour Al Qubeissi; Jihad Badra; Walid Abdelghaffar; Yehia Eldrainy; Sergei Sazhin; Hong Im; Ahmed Elwardany. An Improved Prediction of Pre-Combustion Processes, Using the Discrete Multicomponent Model. Sustainability 2021, 13, 2937 .
AMA StyleIslam Kabil, Mansour Al Qubeissi, Jihad Badra, Walid Abdelghaffar, Yehia Eldrainy, Sergei Sazhin, Hong Im, Ahmed Elwardany. An Improved Prediction of Pre-Combustion Processes, Using the Discrete Multicomponent Model. Sustainability. 2021; 13 (5):2937.
Chicago/Turabian StyleIslam Kabil; Mansour Al Qubeissi; Jihad Badra; Walid Abdelghaffar; Yehia Eldrainy; Sergei Sazhin; Hong Im; Ahmed Elwardany. 2021. "An Improved Prediction of Pre-Combustion Processes, Using the Discrete Multicomponent Model." Sustainability 13, no. 5: 2937.
A micro gas turbine (MGT) can potentially be an alternative power source to the conventional internal combustion engine as a range extender in hybrid electric vehicles. The integration of the MGT into a hybrid vehicle needs a new approach for technical validation requirements compared to the testing of an internal combustion engine. Several attributes of the MGT are predicted to cause concerns for vehicle sub-system requirements such as high ambient temperature and start-stop behaviour. This paper describes the results from specially developed experimental techniques for testing the MGT in a typical automotive environment. A black box MGT was used in this study for performance investigation during hot and cold starts. The MGT was instrumented and fitted with automotive standard components to replicate typical vehicle operational conditions. The intake air temperature was varied between 10 and 24 °C. A significant reduction in the power output of the MGT was observed as the intake temperature was increased. The proposed case scenario caused a reduction in nitrogen oxide emissions in the range of 0.02−0.04 g/km because of the lower combustion temperature at high intake temperature. However, hydrocarbon and carbon monoxide emissions have not shown a noticeable reduction during the power output degradation. The experimental results have highlighted the potential issues of using the MGT at higher intake temperatures and suggest design change to take the effect of higher engine bay temperature into account.
Raja Mazuir Raja Ahsan Shah; Mansour Al Qubeissi; Andrew McGordon; Mark Amor-Segan; Paul Jennings. Micro Gas Turbine Range Extender Performance Analysis Using Varying Intake Temperature. Automotive Innovation 2020, 3, 356 -365.
AMA StyleRaja Mazuir Raja Ahsan Shah, Mansour Al Qubeissi, Andrew McGordon, Mark Amor-Segan, Paul Jennings. Micro Gas Turbine Range Extender Performance Analysis Using Varying Intake Temperature. Automotive Innovation. 2020; 3 (4):356-365.
Chicago/Turabian StyleRaja Mazuir Raja Ahsan Shah; Mansour Al Qubeissi; Andrew McGordon; Mark Amor-Segan; Paul Jennings. 2020. "Micro Gas Turbine Range Extender Performance Analysis Using Varying Intake Temperature." Automotive Innovation 3, no. 4: 356-365.
This paper presents a new approach to the formulation of fuel surrogates in application to gasoline, diesel, and their biofuel blends (including blends of biodiesel/diesel and ethanol/gasoline). This new approach, described as a ‘Complex Fuel Surrogates Model (CFSM)’, is based on a modified version of the Multi-Dimensional Quasi-Discrete Model (MDQDM). The new approach is aimed to reduce the full composition of fuel to a much smaller number of components based on their mass fractions to formulate fuel surrogates. The formulated surrogates for gasoline and blended ethanol/gasoline fuels matched the data of the full compositions of the same fuels for droplet lifetime, surface temperature, density, vapour pressure, H/C ratio, molar weight and research octane number, using the CFSM. Also, the cetane number and viscosity of diesel and biodiesel/diesel blends were mimicked by their suggested surrogates. The results were verified, with up to 7.2% errors between the two sets of predicted droplet lifetimes: surrogates and full compositions of fuels.
Nawar Al-Esawi; Mansour Al Qubeissi. A new approach to formulation of complex fuel surrogates. Fuel 2020, 283, 118923 .
AMA StyleNawar Al-Esawi, Mansour Al Qubeissi. A new approach to formulation of complex fuel surrogates. Fuel. 2020; 283 ():118923.
Chicago/Turabian StyleNawar Al-Esawi; Mansour Al Qubeissi. 2020. "A new approach to formulation of complex fuel surrogates." Fuel 283, no. : 118923.
The reliability of solder joints is a critical issue in the microelectronics industry. The requirement of permanent electrical and thermal connections between solder alloys and the various components of a surface mount device is dependent upon the mechanical integrity of the solder and its interfaces. Accordingly, in this paper, the reliability of lead-free, Sn-3.8Ag-0.7Cu, and leaded, Sn-37Pb, solder alloys was investigated under both thermal-mechanical fatigue (TMF) and isothermal mechanical fatigue (IF) conditions. The investigation included material characterisation and fatigue testing on 4-ball grid array (BGA) specimens. The IF tests were carried out under load control at three different temperatures including Room Temperature (RT), 35 °C and 75 °C. Also, a set of ‘not-in-phase’ (nIP), ‘in-phase’ (IP) and ‘out-of-phase’ (OoP) combined thermal and mechanical cycling tests were carried out to investigate the TMF behaviour of the solders. The stress-life curves for each test condition were generated and then compared taking into account the observations on microstructure. It was found that the IF and TMF performance of Sn-3.8Ag-0.7Cu alloy was better than Sn-37Pb alloy when expressed as stress-life curves. Additionally, the Sn-3.8Ag-0.7Cu was less susceptible to the changes in temperature. This study provides a comprehensive insight into the reliability of solder alloys under a wide range of loading conditions.
Mohammad Ghaleeh; Ahmad Baroutaji; Mansour Al Qubeissi. Microstructure, isothermal and thermomechanical fatigue behaviour of leaded and lead-free solder joints. Engineering Failure Analysis 2020, 117, 104846 .
AMA StyleMohammad Ghaleeh, Ahmad Baroutaji, Mansour Al Qubeissi. Microstructure, isothermal and thermomechanical fatigue behaviour of leaded and lead-free solder joints. Engineering Failure Analysis. 2020; 117 ():104846.
Chicago/Turabian StyleMohammad Ghaleeh; Ahmad Baroutaji; Mansour Al Qubeissi. 2020. "Microstructure, isothermal and thermomechanical fatigue behaviour of leaded and lead-free solder joints." Engineering Failure Analysis 117, no. : 104846.
This work investigates life cycle costing analysis as a tool to estimate the cost of hydrogen to be used as fuel for Hydrogen Fuel Cell vehicles (HFCVs). The method of life cycle costing and economic data are considered to estimate the cost of hydrogen for centralised and decentralised production processes. In the current study, two major hydrogen production methods are considered, methane reforming and water electrolysis. The costing frameworks are defined for hydrogen production, transportation and final application. The results show that hydrogen production via centralised methane reforming is financially viable for future transport applications. The ownership cost of HFCVs shows the highest cost among other costs of life cycle analysis.
Martin Khzouz; Evangelos I. Gkanas; Jia Shao; Farooq Sher; Dmytro Beherskyi; Ahmad El-Kharouf; Mansour Al Qubeissi. Life Cycle Costing Analysis: Tools and Applications for Determining Hydrogen Production Cost for Fuel Cell Vehicle Technology. Energies 2020, 13, 3783 .
AMA StyleMartin Khzouz, Evangelos I. Gkanas, Jia Shao, Farooq Sher, Dmytro Beherskyi, Ahmad El-Kharouf, Mansour Al Qubeissi. Life Cycle Costing Analysis: Tools and Applications for Determining Hydrogen Production Cost for Fuel Cell Vehicle Technology. Energies. 2020; 13 (15):3783.
Chicago/Turabian StyleMartin Khzouz; Evangelos I. Gkanas; Jia Shao; Farooq Sher; Dmytro Beherskyi; Ahmad El-Kharouf; Mansour Al Qubeissi. 2020. "Life Cycle Costing Analysis: Tools and Applications for Determining Hydrogen Production Cost for Fuel Cell Vehicle Technology." Energies 13, no. 15: 3783.
M. Dickison; M. Ghaleeh; S. Milady; S. Subbakrishna; L. T. Wen; Mansour Al Qubeissi. Investigation into the Aerodynamic Performance of a Concept Sports Car. Journal of Applied Fluid Mechanics 2020, 13, 583 -601.
AMA StyleM. Dickison, M. Ghaleeh, S. Milady, S. Subbakrishna, L. T. Wen, Mansour Al Qubeissi. Investigation into the Aerodynamic Performance of a Concept Sports Car. Journal of Applied Fluid Mechanics. 2020; 13 (2):583-601.
Chicago/Turabian StyleM. Dickison; M. Ghaleeh; S. Milady; S. Subbakrishna; L. T. Wen; Mansour Al Qubeissi. 2020. "Investigation into the Aerodynamic Performance of a Concept Sports Car." Journal of Applied Fluid Mechanics 13, no. 2: 583-601.
A Discrete Component Model (DCM) is applied to study the heating and evaporation of suspended kerosene and kerosene surrogate droplets. The effects of natural convection are taken into account using the Churchill approximation, whilst the effects of heat addition from the supporting fibre are modelled using the assumption that heat supplied via the fibre is uniformly distributed within the droplet volume. The results of taking into account and ignoring the above effects are investigated. It is shown that the effect of supporting fibre can be ignored in the analysis of these droplets. In contrast, the effect of natural convection cannot be ignored. The time evolution of droplet radii predicted by the DCM, taking into account the effects of natural convection and supporting fibre, is shown to be close to experimental predictions of this parameter for gas temperatures in the range 500 °C to 700 °C. The heating and evaporation of kerosene droplets are compared with those for droplets of various kerosene surrogate fuels, including eleven surrogate fuels proposed in the literature, and two original compositions. Considering the balance between the heating and evaporation characteristics of droplets we conclude that those of the original surrogate SU1 and the modified Utah surrogate are the closest to those of kerosene droplets.
L. Poulton; O. Rybdylova; I.A. Zubrilin; S.G. Matveev; N.I. Gurakov; M. Al Qubeissi; N. Al-Esawi; T. Khan; V.M. Gun’Ko; S.S. Sazhin. Modelling of multi-component kerosene and surrogate fuel droplet heating and evaporation characteristics: A comparative analysis. Fuel 2020, 269, 117115 .
AMA StyleL. Poulton, O. Rybdylova, I.A. Zubrilin, S.G. Matveev, N.I. Gurakov, M. Al Qubeissi, N. Al-Esawi, T. Khan, V.M. Gun’Ko, S.S. Sazhin. Modelling of multi-component kerosene and surrogate fuel droplet heating and evaporation characteristics: A comparative analysis. Fuel. 2020; 269 ():117115.
Chicago/Turabian StyleL. Poulton; O. Rybdylova; I.A. Zubrilin; S.G. Matveev; N.I. Gurakov; M. Al Qubeissi; N. Al-Esawi; T. Khan; V.M. Gun’Ko; S.S. Sazhin. 2020. "Modelling of multi-component kerosene and surrogate fuel droplet heating and evaporation characteristics: A comparative analysis." Fuel 269, no. : 117115.
Moustafa Al-Damook; Zain Alabdeen Obaid; Mansour Al Qubeissi; Darron Dixon-Hardy; Joshua Cottom; Peter J. Heggs. CFD modeling and performance evaluation of multipass solar air heaters. Numerical Heat Transfer, Part A: Applications 2019, 76, 438 -464.
AMA StyleMoustafa Al-Damook, Zain Alabdeen Obaid, Mansour Al Qubeissi, Darron Dixon-Hardy, Joshua Cottom, Peter J. Heggs. CFD modeling and performance evaluation of multipass solar air heaters. Numerical Heat Transfer, Part A: Applications. 2019; 76 (6):438-464.
Chicago/Turabian StyleMoustafa Al-Damook; Zain Alabdeen Obaid; Mansour Al Qubeissi; Darron Dixon-Hardy; Joshua Cottom; Peter J. Heggs. 2019. "CFD modeling and performance evaluation of multipass solar air heaters." Numerical Heat Transfer, Part A: Applications 76, no. 6: 438-464.
The interest in biofuels was stimulated by the fossil fuel depletion and global warming. This work focuses on the impact of biodiesel fuel on ethanol/diesel (ED) fuel blends. The soybean methyl ester was used as a representative composition of typical biodiesel fuels. The heating and evaporation of ethanol–biodiesel–diesel (EBD) blends were investigated using the Discrete–Component (DC) model. The Cetane Number (CN) of the EBD blends was predicted based on the individual hydrocarbon contributions in the mixture. The mixture viscosity was predicted using the Universal Quasi-Chemical Functional group Activity Coefficients and Viscosity (UNIFAC–VISCO) method, and the lower heating value of the mixture was predicted based on the volume fractions and density of species and blends. Results revealed that a mixture of up to 15% biodiesel, 5% ethanol, and 80% diesel fuels had led to small variations in droplet lifetime, CN, viscosity, and heating value of pure diesel, with less than 1.2%, 0.2%, 2%, and 2.2% reduction in those values, respectively.
Nawar Al-Esawi; Mansour Al Qubeissi; Ruslana Kolodnytska. The Impact of Biodiesel Fuel on Ethanol/Diesel Blends. Energies 2019, 12, 1804 .
AMA StyleNawar Al-Esawi, Mansour Al Qubeissi, Ruslana Kolodnytska. The Impact of Biodiesel Fuel on Ethanol/Diesel Blends. Energies. 2019; 12 (9):1804.
Chicago/Turabian StyleNawar Al-Esawi; Mansour Al Qubeissi; Ruslana Kolodnytska. 2019. "The Impact of Biodiesel Fuel on Ethanol/Diesel Blends." Energies 12, no. 9: 1804.
Mansour Al Qubeissi. Introductory Chapter: Biofuels - Challenges and Opportunities. Biofuels - Challenges and opportunities 2019, 1 .
AMA StyleMansour Al Qubeissi. Introductory Chapter: Biofuels - Challenges and Opportunities. Biofuels - Challenges and opportunities. 2019; ():1.
Chicago/Turabian StyleMansour Al Qubeissi. 2019. "Introductory Chapter: Biofuels - Challenges and Opportunities." Biofuels - Challenges and opportunities , no. : 1.
The multi-dimensional quasi-discrete (MDQD) model is applied to the analysis of heating and evaporation of mixtures of E85 (85 vol. % ethanol and 15 vol. % gasoline) with diesel fuel, commonly known as ‘E85-diesel’ blends, using the universal quasi-chemical functional group activity coefficients model for the calculation of vapor pressure. The contribution of 119 components of E85-diesel fuel blends is taken into account, but replaced with smaller number of components/quasi-components, under conditions representative of diesel engines. Our results show that high fractions of E85-diesel fuel blends have a significant impact on the evolutions of droplet radii and surface temperatures. For instance, droplet lifetime and surface temperature for a blend of 50 vol. % E85 and 50 vol. % diesel are 23.2% and up to 3.4% less than those of pure diesel fuel, respectively. The application of the MDQD model has improved the computational efficiency significantly with minimal sacrifice to accuracy. This approach leads to a saving of up to 86.4% of CPU time when reducing the 119 components to 16 components/quasi-components without a sacrifice to the main features of the model.
Nawar Al-Esawi; Mansour Al Qubeissi; Reece Whitaker; Sergei S. Sazhin. Blended E85–Diesel Fuel Droplet Heating and Evaporation. Energy & Fuels 2019, 33, 2477 -2488.
AMA StyleNawar Al-Esawi, Mansour Al Qubeissi, Reece Whitaker, Sergei S. Sazhin. Blended E85–Diesel Fuel Droplet Heating and Evaporation. Energy & Fuels. 2019; 33 (3):2477-2488.
Chicago/Turabian StyleNawar Al-Esawi; Mansour Al Qubeissi; Reece Whitaker; Sergei S. Sazhin. 2019. "Blended E85–Diesel Fuel Droplet Heating and Evaporation." Energy & Fuels 33, no. 3: 2477-2488.
The focus on managing PV panel temperature has undergone a remarkable development in the last two decades. Specifically, in countries with moderate weather temperature and high insolation, the problem of keeping the PV cell temperature in an optimal range has been managed by use of PV/T collectors. In this work, a single pass PV/T collector using laminar air flow has been assessed. Two PV/T collector designs are utilised, one with and one without offset strip fins. COMSOL Multiphysics v5.3a has been used for the analysis of the thermal and electrical performances. Two assumptions were implemented in order to reduce the computational time from 95 hours to 7 hours, namely ignoring radiative effects between the fins and the wall channels, and representing thin layers as 2D boundaries, whilst ensuring a high level of conformity (4%),. Monocrystalline silicon PV cells were used with a power temperature coefficient of 0.41%. A validation against work in the literature was made, showing a good consistency. The objective of this work is to verify the performance of the air PV/T collector with offset strip fins compared to an unfinned air PV/T collector. The results reveal that the use of offset strip fins has a noticeable impact on both the electrical and thermal efficiencies of the system. In addition, the maximum combined efficiency (ηCo) for the finned PV/T system is 84.7% while the unfinned PV/T system is 51.2%.
Moustafa Al-Damook; Darron Dixon-Hardy; Peter J. Heggs; Mansour Al Qubeissi; Khaled Al-Ghaithi; Patrick E. Mason; Joshua Cottom. CFD analysis of a one-pass photovoltaic/thermal air system with and without offset strip fins. MATEC Web of Conferences 2018, 240, 03002 .
AMA StyleMoustafa Al-Damook, Darron Dixon-Hardy, Peter J. Heggs, Mansour Al Qubeissi, Khaled Al-Ghaithi, Patrick E. Mason, Joshua Cottom. CFD analysis of a one-pass photovoltaic/thermal air system with and without offset strip fins. MATEC Web of Conferences. 2018; 240 ():03002.
Chicago/Turabian StyleMoustafa Al-Damook; Darron Dixon-Hardy; Peter J. Heggs; Mansour Al Qubeissi; Khaled Al-Ghaithi; Patrick E. Mason; Joshua Cottom. 2018. "CFD analysis of a one-pass photovoltaic/thermal air system with and without offset strip fins." MATEC Web of Conferences 240, no. : 03002.
The evolutions of droplet radii and temperatures for ethanol and gasoline fuels and their blends are investigated using a modified version of the Discrete Component (DC) model, taking into account the effect of the activity coefficient (AC). The universal quasi-chemical functional–group AC (UNIFAC) model is used to predict the ACs of the blended ethanol and gasoline fuels approximated by 21 components. In contrast to previous studies, it is shown that droplet lifetimes predicted for pure gasoline are not always shorter than those predicted for ethanol/gasoline blends. They depend on the total vapour pressure of the mixture. It is shown that the original DC model predicts ethanol/gasoline fuel droplet lifetimes with errors up to 5.7% compared to those predicted using the same model but with the ACs obtained from the UNIFAC model.
Nawar Al-Esawi; Mansour Al Qubeissi; Sergei S. Sazhin; Reece Whitaker. The impacts of the activity coefficient on heating and evaporation of ethanol/gasoline fuel blends. International Communications in Heat and Mass Transfer 2018, 98, 177 -182.
AMA StyleNawar Al-Esawi, Mansour Al Qubeissi, Sergei S. Sazhin, Reece Whitaker. The impacts of the activity coefficient on heating and evaporation of ethanol/gasoline fuel blends. International Communications in Heat and Mass Transfer. 2018; 98 ():177-182.
Chicago/Turabian StyleNawar Al-Esawi; Mansour Al Qubeissi; Sergei S. Sazhin; Reece Whitaker. 2018. "The impacts of the activity coefficient on heating and evaporation of ethanol/gasoline fuel blends." International Communications in Heat and Mass Transfer 98, no. : 177-182.