Mohamed R . Gomaa | Benha University (original) (raw)

Papers by Mohamed R . Gomaa

WSEAS transactions on heat and mass transfer, Dec 31, 2022

Energy Reports, Dec 1, 2023

International Journal of Energy Research

Irrigation systems to supply water to agricultural land are essential in remote and isolated area... more Irrigation systems to supply water to agricultural land are essential in remote and isolated areas. However, these areas often face challenges and obstacles in obtaining energy for use in irrigation since many depend on diesel generators (DGs) to produce electricity. A farm located in a remote area in Al-Jafr, Jordan, uses a 100 kW DG to supply its need for electric energy for irrigation purposes. Its energy consumption is 500 kWh/day at 0.29/kWh.Thispaperdesignsanewhybridrenewableenergysystem(HRES)forthisfarmbyconductingsimulationsusingtheHOMER(HybridOptimizationofMultipleEnergyResources)software.Thisnewsystemconsistsofsolarphotovoltaics(PVs),batteries,aninverter,anda100kWDG.TheresultsshowedacleardifferencebetweenthebaselineDG−onlysystemandthehybridsystemregardingenergycostandcarbonemissions.TheenergypricefortheHRESis0.29/kWh. This paper designs a new hybrid renewable energy system (HRES) for this farm by conducting simulations using the HOMER (Hybrid Optimization of Multiple Energy Resources) software. This new system consists of solar photovoltaics (PVs), batteries, an inverter, and a 100 kW DG. The results showed a clear difference between the baseline DG-only system and the hybrid system regarding energy cost and carbon emissions. The energy price for the HRES is 0.29/kWh.Thispaperdesignsanewhybridrenewableenergysystem(HRES)forthisfarmbyconductingsimulationsusingtheHOMER(HybridOptimizationofMultipleEnergyResources)software.Thisnewsystemconsistsofsolarphotovoltaics(PVs),batteries,aninverter,anda100kWDG.TheresultsshowedacleardifferencebetweenthebaselineDG−onlysystemandthehybridsystemregardingenergycostandcarbonemissions.TheenergypricefortheHRESis0.107/kWh, and carbon dioxide emissions are reduced to 27,378 kg/yr from 184,917 kg/yr for the...

Energies

Wind turbine farms require efficient operation and maintenance strategies to ensure long-term pro... more Wind turbine farms require efficient operation and maintenance strategies to ensure long-term profitability and cost-effectiveness. However, temperatures and dust accumulation can significantly affect turbine performance and increase maintenance costs. This study investigates the impact of air filter clogging on wind turbine nacelle temperature and performance by collecting data from the Supervisory Control and Data Acquisition (SCADA) system of wind farms in southern Jordan, including temperature, wind speed, and power generation. The findings demonstrate that uncleaned air filters can lead to inefficient heat dissipation, higher nacelle temperatures, and reduced power production. Turbines with uncleaned filters experienced an average nacelle temperature increase of 15.44 °C compared to 13.30 °C for turbines with clean filters, resulting in a difference in the power production of 66.54 kW.

Processes

Jordan’s energy situation is in a critical state of dependency, with the country relying heavily ... more Jordan’s energy situation is in a critical state of dependency, with the country relying heavily on imports to satisfy its ever-increasing energy requirements. Renewable energy is a more competitive and consistent source of energy that can supply a large proportion of a country’s energy demand. It is environmentally friendly and minimizes atmospheric pollutant emissions. Thus, bioenergy has the potential to be a crucial alternative energy source in Jordan. Biomass is the principal source of bioenergy; it accounts for approximately 13% of the primary energy demand and is anticipated to supply half of the total primary energy demand by 2050. Nanotechnology has emerged as an important scientific research area with numerous applications, including biofuels. This review summarizes the application of nanoparticles to improve the properties and processes of biofuels. It presents the availability and viability of nanotechnology-supported bioenergy production in Jordan. Jordan generates up t...

WSEAS TRANSACTIONS ON SYSTEMS

Nowadays there are increasing demands for the electricity also the rapid improvement in the techn... more Nowadays there are increasing demands for the electricity also the rapid improvement in the technology and urbanization that increases energy consumption daily, in the other hand there are many research to find an optimal and economical storage system for the renewable energy that can reduce the demand on the fossil fuel , also reduce the emission and save the environment in this report we review some applications and methods related to the Integrated between the photovoltaic system with pumped hydro storage system the first application in the residential building , the second one in the arid area and the third one in the farms above methods or applications used to minimize cost and reduce emission by reduce dependency on fossil fuel, that’s occur by use the system contains of Photovoltaic (PV) system with pumped hydro storage ,the major components of the systems used are PV panels, upper reservoir and lower reservoir, control center or inverter, pump, turbine and connected to publi...

Sustainability

A hybrid system, such as solar and wind, may be more successful than nonhybrid systems in acceler... more A hybrid system, such as solar and wind, may be more successful than nonhybrid systems in accelerating the transition from conventional to renewable power sources. However, these new energy sources have several challenges, such as intermittency, storage capacity, and grid stability. This paper presents a complete analysis and study of a hybrid renewable-energy system (HRES) to convert a facility into a green building and reduce its dependence on conventional energy by generating clean energy with near-zero greenhouse-gas (GHG) emissions. The proposed system aims to reduce the energy bill of a hotel in Petra, Jordan, by considering different sustainable energy resource configurations in a grid-connected hybrid renewable energy system (GHRES). The hybrid optimization of multiple energy resources (HOMER) grid software was utilized on the hybrid systems to study ways to improve their overall efficiency and mitigate GHG emissions from an economic perspective. The hybrid system components...

International Review of Mechanical Engineering (IREME), 2021

Energies

Quantitative and qualitative analyses of chemical species out of CI engine tailpipe emissions fue... more Quantitative and qualitative analyses of chemical species out of CI engine tailpipe emissions fueled with pure diesel and diesel methanol blends, trapped in dinitro phenylhydrazine (DNPH) solutions, were performed. The formed hydrazine was studied using high-performance liquid chromatography (HPLC) accompanied by a detector for ultraviolet (UV). A set of carbonyl-DNPH derivative standards was developed and compared with engine tailpipe gases produced by both fuel modes. An understanding of carbonyl chemical compounds such as formaldehyde, acetaldehyde, and acrolein (HCHO, CH3CHO, and H2 = CHCHO, respectively) is essential for researchers to know how these chemicals affect human health and the environment. In both fuel modes, acetaldehyde was the main combustible product 25 ppm followed by formaldehyde 17 ppm, croton aldehydes 16 ppm, acrolein 12 ppm, and iso-valerdyhyde 10 ppm. In addition to these species, only a few other chemical species were detected in the exhaust gas. Accordin...

Sustainability

This work investigated the potential for waste heat recovery from a cement factory using thermoel... more This work investigated the potential for waste heat recovery from a cement factory using thermoelectric generation (TEG) technology. Several TEGs were placed on a secondary coaxial shell separated from the kiln shell by an air gap. The performance of the system was tested and evaluated experimentally. Two cooling methods, active water and forced air, were considered. A forced closed-loop water cooling system with a heat exchanger was considered for the active-water cooling method. A heat exchanger was inserted before the water tank to improve cooling efficiency by reducing the inlet temperature of the cooling water tank, in contrast to forced-air cooling, in which a heatsink was used. The obtained results indicated that the closed-loop water-cooled system equipped with a radiator, i.e., active water, has the highest conversion efficiency. The maximum absorbed heat for the forced-air and active-water cooling systems were 265.03 and 262.95 W, respectively. The active-water cooling met...

International Journal of Hydrogen Energy

Case Studies in Thermal Engineering

Chinese Journal of Mechanical Engineering, 2021

Sea wave energy generators or converters (WECs) have the potential to become a viable technology ... more Sea wave energy generators or converters (WECs) have the potential to become a viable technology for clean, renewable energy production. Among the WEC technologies, the oscillating water columns (OWCs) are the most common WEC devices studied. These have been studied and developed over many years. Multi-chamber oscillating water columns (MC-OWC) have the potential to have a higher energy conversion when extracting energy in mixed sea states than single-chamber devices. In the work reported in this paper, physical experiments are carried under regular wave conditions to test the wave power extraction of a fixed MC-OWC small-scale model. The Power Take-Off (PTO) of the device is simulated using orifice plates. The flow characteristics through these orifices are pre-calibrated such that the extracted power can be obtained only using the pressure measurement. Wave condition effects on the damping of the PTO of the device power extraction are addressed. The test results illustrate that th...

Energy is one of the most important inputs for the development and economic growth. In this conte... more Energy is one of the most important inputs for the development and economic growth. In this context, this research aimed to study a renewable power source by investigating the gasification of carbonaceous materials in order to produce syngas in a theoretically modelled solar reactor. Monte Carlo ray tracing method was used to design an indirectly irradiated fluidized bed solar reactor to be used in the co-gasification process of 50% olive pomace and 50% lignite mixture with H2O and O2. The solar reactor model approves the ability of using the solar energy as a heat source in gasification. Oxygen could be fed into a solar gasification reactor reliably to increase temperatures by combusting some of the used feedstock during the frequency of solar transients. The development of the stoichiometric equilibrium model for co-gasification process aimed to investigate the solar reactor performance where the addition of lignite to olive pomace played a great role in reducing tar formation and...

Fuel Processing Technology, 2021

International Review of Mechanical Engineering (IREME), 2020

Previous studies examining gasoline and hydrogen engines have typically focused on factors pertai... more Previous studies examining gasoline and hydrogen engines have typically focused on factors pertaining to air to fuel ratios, their effects on an ICE performance, combustion by-products produced during the ignition cycle and its subsequent environmental effects. Alternatively, this study examines the ways in which a hydrogen engine cavitation can be enhanced by using a graphene coated layer on the cylinder combustion chamber walls. SEM micrographs for the coated surfaces' microstructure showed a uniform distribution of the graphene layer that was free from cavities and demonstrating little to no observable defects. The study's results also showed large improvements in the BTE and exhaust temperature with respect to BMEP performance. This further resulted in significantly low levels harmful gaseous emissions, with observable reductions in the emissions of CO, NOx, and hydrocarbon derived from gasoline and pure hydrogen fuel. These results are thus indicative of a significant improvement in the performance of this particular typology of engine, in contrast to other experimentation focus found in other studies.

Journal of Cleaner Production, 2019

WSEAS transactions on heat and mass transfer, Dec 31, 2022

Energy Reports, Dec 1, 2023

International Journal of Energy Research

Irrigation systems to supply water to agricultural land are essential in remote and isolated area... more Irrigation systems to supply water to agricultural land are essential in remote and isolated areas. However, these areas often face challenges and obstacles in obtaining energy for use in irrigation since many depend on diesel generators (DGs) to produce electricity. A farm located in a remote area in Al-Jafr, Jordan, uses a 100 kW DG to supply its need for electric energy for irrigation purposes. Its energy consumption is 500 kWh/day at 0.29/kWh.Thispaperdesignsanewhybridrenewableenergysystem(HRES)forthisfarmbyconductingsimulationsusingtheHOMER(HybridOptimizationofMultipleEnergyResources)software.Thisnewsystemconsistsofsolarphotovoltaics(PVs),batteries,aninverter,anda100kWDG.TheresultsshowedacleardifferencebetweenthebaselineDG−onlysystemandthehybridsystemregardingenergycostandcarbonemissions.TheenergypricefortheHRESis0.29/kWh. This paper designs a new hybrid renewable energy system (HRES) for this farm by conducting simulations using the HOMER (Hybrid Optimization of Multiple Energy Resources) software. This new system consists of solar photovoltaics (PVs), batteries, an inverter, and a 100 kW DG. The results showed a clear difference between the baseline DG-only system and the hybrid system regarding energy cost and carbon emissions. The energy price for the HRES is 0.29/kWh.Thispaperdesignsanewhybridrenewableenergysystem(HRES)forthisfarmbyconductingsimulationsusingtheHOMER(HybridOptimizationofMultipleEnergyResources)software.Thisnewsystemconsistsofsolarphotovoltaics(PVs),batteries,aninverter,anda100kWDG.TheresultsshowedacleardifferencebetweenthebaselineDG−onlysystemandthehybridsystemregardingenergycostandcarbonemissions.TheenergypricefortheHRESis0.107/kWh, and carbon dioxide emissions are reduced to 27,378 kg/yr from 184,917 kg/yr for the...

Energies

Wind turbine farms require efficient operation and maintenance strategies to ensure long-term pro... more Wind turbine farms require efficient operation and maintenance strategies to ensure long-term profitability and cost-effectiveness. However, temperatures and dust accumulation can significantly affect turbine performance and increase maintenance costs. This study investigates the impact of air filter clogging on wind turbine nacelle temperature and performance by collecting data from the Supervisory Control and Data Acquisition (SCADA) system of wind farms in southern Jordan, including temperature, wind speed, and power generation. The findings demonstrate that uncleaned air filters can lead to inefficient heat dissipation, higher nacelle temperatures, and reduced power production. Turbines with uncleaned filters experienced an average nacelle temperature increase of 15.44 °C compared to 13.30 °C for turbines with clean filters, resulting in a difference in the power production of 66.54 kW.

Processes

Jordan’s energy situation is in a critical state of dependency, with the country relying heavily ... more Jordan’s energy situation is in a critical state of dependency, with the country relying heavily on imports to satisfy its ever-increasing energy requirements. Renewable energy is a more competitive and consistent source of energy that can supply a large proportion of a country’s energy demand. It is environmentally friendly and minimizes atmospheric pollutant emissions. Thus, bioenergy has the potential to be a crucial alternative energy source in Jordan. Biomass is the principal source of bioenergy; it accounts for approximately 13% of the primary energy demand and is anticipated to supply half of the total primary energy demand by 2050. Nanotechnology has emerged as an important scientific research area with numerous applications, including biofuels. This review summarizes the application of nanoparticles to improve the properties and processes of biofuels. It presents the availability and viability of nanotechnology-supported bioenergy production in Jordan. Jordan generates up t...

WSEAS TRANSACTIONS ON SYSTEMS

Nowadays there are increasing demands for the electricity also the rapid improvement in the techn... more Nowadays there are increasing demands for the electricity also the rapid improvement in the technology and urbanization that increases energy consumption daily, in the other hand there are many research to find an optimal and economical storage system for the renewable energy that can reduce the demand on the fossil fuel , also reduce the emission and save the environment in this report we review some applications and methods related to the Integrated between the photovoltaic system with pumped hydro storage system the first application in the residential building , the second one in the arid area and the third one in the farms above methods or applications used to minimize cost and reduce emission by reduce dependency on fossil fuel, that’s occur by use the system contains of Photovoltaic (PV) system with pumped hydro storage ,the major components of the systems used are PV panels, upper reservoir and lower reservoir, control center or inverter, pump, turbine and connected to publi...

Sustainability

A hybrid system, such as solar and wind, may be more successful than nonhybrid systems in acceler... more A hybrid system, such as solar and wind, may be more successful than nonhybrid systems in accelerating the transition from conventional to renewable power sources. However, these new energy sources have several challenges, such as intermittency, storage capacity, and grid stability. This paper presents a complete analysis and study of a hybrid renewable-energy system (HRES) to convert a facility into a green building and reduce its dependence on conventional energy by generating clean energy with near-zero greenhouse-gas (GHG) emissions. The proposed system aims to reduce the energy bill of a hotel in Petra, Jordan, by considering different sustainable energy resource configurations in a grid-connected hybrid renewable energy system (GHRES). The hybrid optimization of multiple energy resources (HOMER) grid software was utilized on the hybrid systems to study ways to improve their overall efficiency and mitigate GHG emissions from an economic perspective. The hybrid system components...

International Review of Mechanical Engineering (IREME), 2021

Energies

Quantitative and qualitative analyses of chemical species out of CI engine tailpipe emissions fue... more Quantitative and qualitative analyses of chemical species out of CI engine tailpipe emissions fueled with pure diesel and diesel methanol blends, trapped in dinitro phenylhydrazine (DNPH) solutions, were performed. The formed hydrazine was studied using high-performance liquid chromatography (HPLC) accompanied by a detector for ultraviolet (UV). A set of carbonyl-DNPH derivative standards was developed and compared with engine tailpipe gases produced by both fuel modes. An understanding of carbonyl chemical compounds such as formaldehyde, acetaldehyde, and acrolein (HCHO, CH3CHO, and H2 = CHCHO, respectively) is essential for researchers to know how these chemicals affect human health and the environment. In both fuel modes, acetaldehyde was the main combustible product 25 ppm followed by formaldehyde 17 ppm, croton aldehydes 16 ppm, acrolein 12 ppm, and iso-valerdyhyde 10 ppm. In addition to these species, only a few other chemical species were detected in the exhaust gas. Accordin...

Sustainability

This work investigated the potential for waste heat recovery from a cement factory using thermoel... more This work investigated the potential for waste heat recovery from a cement factory using thermoelectric generation (TEG) technology. Several TEGs were placed on a secondary coaxial shell separated from the kiln shell by an air gap. The performance of the system was tested and evaluated experimentally. Two cooling methods, active water and forced air, were considered. A forced closed-loop water cooling system with a heat exchanger was considered for the active-water cooling method. A heat exchanger was inserted before the water tank to improve cooling efficiency by reducing the inlet temperature of the cooling water tank, in contrast to forced-air cooling, in which a heatsink was used. The obtained results indicated that the closed-loop water-cooled system equipped with a radiator, i.e., active water, has the highest conversion efficiency. The maximum absorbed heat for the forced-air and active-water cooling systems were 265.03 and 262.95 W, respectively. The active-water cooling met...

International Journal of Hydrogen Energy

Case Studies in Thermal Engineering

Chinese Journal of Mechanical Engineering, 2021

Sea wave energy generators or converters (WECs) have the potential to become a viable technology ... more Sea wave energy generators or converters (WECs) have the potential to become a viable technology for clean, renewable energy production. Among the WEC technologies, the oscillating water columns (OWCs) are the most common WEC devices studied. These have been studied and developed over many years. Multi-chamber oscillating water columns (MC-OWC) have the potential to have a higher energy conversion when extracting energy in mixed sea states than single-chamber devices. In the work reported in this paper, physical experiments are carried under regular wave conditions to test the wave power extraction of a fixed MC-OWC small-scale model. The Power Take-Off (PTO) of the device is simulated using orifice plates. The flow characteristics through these orifices are pre-calibrated such that the extracted power can be obtained only using the pressure measurement. Wave condition effects on the damping of the PTO of the device power extraction are addressed. The test results illustrate that th...

Energy is one of the most important inputs for the development and economic growth. In this conte... more Energy is one of the most important inputs for the development and economic growth. In this context, this research aimed to study a renewable power source by investigating the gasification of carbonaceous materials in order to produce syngas in a theoretically modelled solar reactor. Monte Carlo ray tracing method was used to design an indirectly irradiated fluidized bed solar reactor to be used in the co-gasification process of 50% olive pomace and 50% lignite mixture with H2O and O2. The solar reactor model approves the ability of using the solar energy as a heat source in gasification. Oxygen could be fed into a solar gasification reactor reliably to increase temperatures by combusting some of the used feedstock during the frequency of solar transients. The development of the stoichiometric equilibrium model for co-gasification process aimed to investigate the solar reactor performance where the addition of lignite to olive pomace played a great role in reducing tar formation and...

Fuel Processing Technology, 2021

International Review of Mechanical Engineering (IREME), 2020

Previous studies examining gasoline and hydrogen engines have typically focused on factors pertai... more Previous studies examining gasoline and hydrogen engines have typically focused on factors pertaining to air to fuel ratios, their effects on an ICE performance, combustion by-products produced during the ignition cycle and its subsequent environmental effects. Alternatively, this study examines the ways in which a hydrogen engine cavitation can be enhanced by using a graphene coated layer on the cylinder combustion chamber walls. SEM micrographs for the coated surfaces' microstructure showed a uniform distribution of the graphene layer that was free from cavities and demonstrating little to no observable defects. The study's results also showed large improvements in the BTE and exhaust temperature with respect to BMEP performance. This further resulted in significantly low levels harmful gaseous emissions, with observable reductions in the emissions of CO, NOx, and hydrocarbon derived from gasoline and pure hydrogen fuel. These results are thus indicative of a significant improvement in the performance of this particular typology of engine, in contrast to other experimentation focus found in other studies.

Journal of Cleaner Production, 2019