Jamil Al Asfar
University of Jordan
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Featured researches published by Jamil Al Asfar.
Energy Sources Part A-recovery Utilization and Environmental Effects | 2016
Jamil Al Asfar; Ahmad Hammad; Ahmad Sakhrieh; Mohammad Hamdan
ABSTRACT A two-dimensional (2-D) modeling of the burning process of Jordanian oil shale in a circulating fluidized bed (CFB) burner was done in this study. The governing equations of continuity, momentum, energy, mass diffusion, and chemical combustion reactions kinetics were solved numerically using the finite volume method. The numerical solution was carried out using a high-resolution 2-D mesh to account for the solid and gaseous phases, k-ε turbulence, non-premixed combustion, and reacting CFD model with the same dimensions and materials of the experimental combustion burner used in this work. The temperature distribution and evolution of species were also computed. Proximate and ultimate analyses were also performed to evaluate the air–fuel ratio and ash content. The required thermophysical properties, such as heating value, density, and porosity were obtained experimentally, while the activation energy was obtained from published literature. It was found that the temperature contours of the combustion process showed that the adiabatic flame temperature was 1080 K in a vertical burner, while the obtained experimental results of maximum temperature at various locations of the burner in actual, non-adiabatic, non-stoichiometric combustion reached 950 K, showing good agreement with the model.
Energy Sources Part A-recovery Utilization and Environmental Effects | 2018
Jamil Al Asfar; Ahmad AlShwawra; Ahmad Sakhrieh; Mohammad Hamdan
ABSTRACT In this study, a developed two-dimensional mathematical model was used to represent the physical model of the combustion process of olive cake and date seed, and solve the governing equations using finite-volume method. The simulation was performed using ANSYS/Fluent software in order to estimate maximum temperature, heating values and pollutants concentrations. The obtained results were compared with experimental results, and corresponding values of oil shale and coal. The experimental work of direct burning of olive cake and date seeds was performed using an existing circulated fluidized bed (CFB) unit. It was found that the adiabatic flame temperatures were 1380 K and 839 K for olive cake and date seed, and 2260 K and 1080 K for coal and oil shale, respectively. The experimental results showed that the maximum temperatures were 1126 K and 723 K for olive cake and date seed, respectively. The lower heating values were 19,500 kJ/kg and 16,400 kJ/kg for olive cake and date seed, and 29,000 kJ/kg and 7000 kJ/kg for coal and oil shale, respectively. Thus, biomass such as date seed and olive cake may be used as an alternative fuel in electrical power plants in olive- or date-producing countries, which may save 40% of fuel cost.
INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2016) | 2017
Ahmad Hammad; Jamil Al Asfar
A comparative study of the direct burning processes of oil shale and coal in a circulating fluidized bed (CFB) was done in this study using ANSYS Fluent software to solve numerically the governing equations of continuity, momentum, energy and mass diffusion using finite volume method. The model was built based on an existing experimental combustion burner unit. The model was validated by comparing the theoretical results of oil shale with proved experimental results from the combustion unit. It was found that the temperature contours of the combustion process showed that the adiabatic flame temperature was 1080 K for oil shale compared with 2260 K for coal, while the obtained experimental results of temperatures at various locations of burner during the direct burning of oil shale showed that the maximum temperature reached 962 K for oil shale. These results were used in economic and environmental analysis which show that oil shale may be used as alternative fuel for coal in cement industry in Jordan.
Energy Conversion and Management | 2013
A. Fasfous; Jamil Al Asfar; A. Al-Salaymeh; Ahmad Sakhrieh; Z. Al_hamamre; A. Al-bawwab; M.A. Hamdan
Sustainable Cities and Society | 2018
Osama Ayadi; Rami Al-Assad; Jamil Al Asfar
Renewable Energy | 2019
Arwa Sandouqa; Zayed Al-Hamamre; Jamil Al Asfar
International Journal of Heat and Technology | 2018
Jamil Al Asfar; Shahnaz Alkhalil; Ahmad Sakhrieh; Hazem Al-Domeri
Renewable Energy | 2017
Hanin Al-Hamidi; Jamil Al Asfar
Archive | 2014
Jamil Al Asfar; Osama Ayadi; Ahmed Al Salaymeh
World Renewable Energy Congress – Sweden, 8–13 May, 2011, Linköping, Sweden | 2011
Jamil Al Asfar; Ashraf Salim