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Presently, one of the biggest predicaments in developing countries is the ever-growing local demand for electrical energy in the face of limited availability of locally derived natural resources. The Middle Eastern country of Jordan provides for an apt example of this. Domestically, Jordan generates a very limited amount of its own electrical energy output. Contributing 2.4% of its total energy consumption, Jordan has been driven by the need to diversify its reliance on alternative energy sources. One such alternative is that of renewable energy with its potential to cater to local supply and demand for electricity. Off-grid energy generating technologies can provide a more reliable supply and extending its reach into remote and rural areas. These technologies provide the added benefits of being more environmentally sustainable, cost-efficient, and can operate independently, not reliant on multiple public utilities. Against this backdrop, this study evaluates the benefits of gasification technology, providing for a renewable energy source that can meet the needs for a reliable supply whilst simultaneously distributing power to remote rural areas. It does this by scrutinizing existing investigative works and experimentations premised on the gasification of carbonaceous material for the purpose of producing syngas that can then be used as an energy source. In this gasification process, the most common material typically used is biomass. However, such technologies and their accompanying processes are not without their challenges. These include, but are not limited to, low energy density, low heating value, higher tar content, and an unstable supply. In an attempt to overcome these associated issues, biomass and coal are often synergized in a singular process referred to as ‘co-gasification’. While the combination of biomass and coal vastly improved the process of co-gasification, various other factors aid this process. These include flow geometry, where the gasifier can be categorized into several forms: an entrained flow gasifier, a moving bed gasifier, and a fluidized bed gasifier. Further factors included a gasification agent, operating conditions (i.e. temperature, pressure), heating rate, feedstock composition, fuel blending ratio, and particle size, influenced by the percentage of gases and ratio produced between CO, CO2, CH4, and H2. This study therefore provides a comparative analysis between a co-gasification process and normal gasification to determine not only the elements that impact these processes, but also what can be improved for ultimately optimizing gasification.
Mohamed Ramadan Gomaa; Ghayda’ A. Matarneh; Mohammad Shalby; Hani A. Al-Rawashdeh. A State-of-the-art Review on a Thermochemical Conversion of Carbonaceous Materials: Production of Synthesis Gas by Co-Gasification Process- Part I. Current Alternative Energy 2021, 4, 26 -46.
AMA StyleMohamed Ramadan Gomaa, Ghayda’ A. Matarneh, Mohammad Shalby, Hani A. Al-Rawashdeh. A State-of-the-art Review on a Thermochemical Conversion of Carbonaceous Materials: Production of Synthesis Gas by Co-Gasification Process- Part I. Current Alternative Energy. 2021; 4 (1):26-46.
Chicago/Turabian StyleMohamed Ramadan Gomaa; Ghayda’ A. Matarneh; Mohammad Shalby; Hani A. Al-Rawashdeh. 2021. "A State-of-the-art Review on a Thermochemical Conversion of Carbonaceous Materials: Production of Synthesis Gas by Co-Gasification Process- Part I." Current Alternative Energy 4, no. 1: 26-46.
Against the backdrop of the ever growing scientific and public interest in locating alternative sources of clean energy, geared toward the overarching objective of mitigating the harmful implications of greenhouse effects on the environment, this paper proposes one such alternative. In capturing the environmental benefits to be gained from waste heat recovered during a cement industrial process, this paper demonstrates how an Organic Rankine Cycle (ORC) can be a viable source of power production. This owes to its ability to expend both medium and high-grade temperature heat sources. In the process of design and experimentation, this study adopted a hybrid solution using waste heat recovery (WHR) that was combined with a solar field, to transform power in the ORC through a thermal oil loop and produce electricity. The WHR was taken from flue gases of a rotary kiln found in cement industrial processes but that also has the advantage of working across a range of temperatures. These ranged from 250 °C to 380 °C. The solar domain incorporated a Parabolic-Trough Solar Collector (PTSC), with the working fluid R245fa. The performance of each component was then analyzed and optimized. The concluding results of this study evidences that an ORC can ultimately be of significant benefit to industry both economically and environmentally, by generating up to 323 to 360 kW of electricity that is required to power a cement plant, while providing for a payback time period within the range of 3.75 years and a net saving of 280,000 $/year.
Mohamed R. Gomaa; Ramadan J. Mustafa; Mujahed Al-Dhaifallah; Hegazy Rezk. A low-grade heat Organic Rankine Cycle driven by hybrid solar collectors and a waste heat recovery system. Energy Reports 2020, 6, 3425 -3445.
AMA StyleMohamed R. Gomaa, Ramadan J. Mustafa, Mujahed Al-Dhaifallah, Hegazy Rezk. A low-grade heat Organic Rankine Cycle driven by hybrid solar collectors and a waste heat recovery system. Energy Reports. 2020; 6 ():3425-3445.
Chicago/Turabian StyleMohamed R. Gomaa; Ramadan J. Mustafa; Mujahed Al-Dhaifallah; Hegazy Rezk. 2020. "A low-grade heat Organic Rankine Cycle driven by hybrid solar collectors and a waste heat recovery system." Energy Reports 6, no. : 3425-3445.
In this paper, two different cost-effective cooling techniques with new designs are proposed and experimentally evaluated to enhance the performance of solar PV system. The first technique is the direct active cooling with water whereas the second one is a passive cooling that uses fins mounted on the backside of the PV module. Besides, an extra PV module is employed without any cooling system as a reference margin for comparison purposes. The experimental measurements for three individuals PV modules have been collected and compared. The results indicated that the temperature of the PV module surface had been reduced using two cooling techniques compared with the non-cooling module. The maximum temperature values are 38, 55, and 58 °C for water-cooling, fins cooling, and non-cooling module, respectively. This reduction in the temperature with cooling systems improves the performance of the PV module. It was found that the harvested energy per day is increased by 10.2% and 7% for backwater cooling and fins cooling modules, respectively, compared with the non-cooling module. Besides, the performance ratio was enhanced up to 84% and 81% for the water-cooling module and fins cooling-module, respectively. While at the same time, it was 77% for the non-cooling module.
Mohamed R. Gomaa; Waleed Hammad; Mujahed Al-Dhaifallah; Hegazy Rezk. Performance enhancement of grid-tied PV system through proposed design cooling techniques: An experimental study and comparative analysis. Solar Energy 2020, 211, 1110 -1127.
AMA StyleMohamed R. Gomaa, Waleed Hammad, Mujahed Al-Dhaifallah, Hegazy Rezk. Performance enhancement of grid-tied PV system through proposed design cooling techniques: An experimental study and comparative analysis. Solar Energy. 2020; 211 ():1110-1127.
Chicago/Turabian StyleMohamed R. Gomaa; Waleed Hammad; Mujahed Al-Dhaifallah; Hegazy Rezk. 2020. "Performance enhancement of grid-tied PV system through proposed design cooling techniques: An experimental study and comparative analysis." Solar Energy 211, no. : 1110-1127.
Thermoelectric generation technology is considered to be one of the viable methods to convert waste heat energy directly into electricity. The utilization of this technology has been impeded due to low energy conversion efficiency. This paper aims to improve the energy conversion efficiency of the thermoelectric generator (TEG) model with a novel maximum power point tracking (MPPT) technique. A variable fractional order fuzzy logic controller (VFOFLC)-based MPPT technique is proposed in the present work in which the operating point of the TEG is moved quickly towards an optimal position to increase the energy harvesting. The fraction order term α, introduced in the MPPT algorithm, will expand or contract the input domain of the fuzzy logic controller (FLC to shorten the tracking time and maintain a steady-state output around the maximum power point (MPP). The performance of the proposed MPPT technique was verified with the TEG model by simulation using MATLAB /SIMULINK software. Then, the overall performance of the VFOFLC-based MPPT technique was analyzed and compared with Perturb and observe (P&O) and incremental resistance (INR)-based MPPT techniques. The obtained results confirm that the proposed MPPT technique can improve the energy conversion efficiency of the TEG by harvesting the maximum power within a shorter time and maintaining a steady-state output when compared to other techniques.
N. Kanagaraj; Hegazy Rezk; Mohamed R. Gomaa Behiri. A Variable Fractional Order Fuzzy Logic Control Based MPPT Technique for Improving Energy Conversion Efficiency of Thermoelectric Power Generator. Energies 2020, 13, 4531 .
AMA StyleN. Kanagaraj, Hegazy Rezk, Mohamed R. Gomaa Behiri. A Variable Fractional Order Fuzzy Logic Control Based MPPT Technique for Improving Energy Conversion Efficiency of Thermoelectric Power Generator. Energies. 2020; 13 (17):4531.
Chicago/Turabian StyleN. Kanagaraj; Hegazy Rezk; Mohamed R. Gomaa Behiri. 2020. "A Variable Fractional Order Fuzzy Logic Control Based MPPT Technique for Improving Energy Conversion Efficiency of Thermoelectric Power Generator." Energies 13, no. 17: 4531.
This work presents performance study of a concentrating photovoltaic/thermal (CPV/T) collector and its efficiency to produce electric and thermal power under different operating conditions. The study covers a detailed description of flat photovoltaic/thermal (PV/T) and CPV/T systems using water as a cooling working fluid, numerical model analysis, and qualitative evaluation of thermal and electrical output. The aim of this study was to achieve higher efficiency of the photovoltaic (PV) system while reducing the cost of generating power. Concentrating photovoltaic (CPV) cells with low-cost reflectors were used to enhance the efficiency of the PV system and simultaneously reduce the cost of electricity generation. For this purpose, a linear Fresnel flat mirror (LFFM) integrated with a PV system was used for low-concentration PV cells (LCPV). To achieve the maximum benefit, water as a coolant fluid was used to study the ability of actively cooling PV cells, since the electrical power of the CPV system is significantly affected by the temperature of the PV cells. This system was characterized over the traditional PV systems via producing more electrical energy due to concentrating the solar radiation as well as cooling the PV modules and at the same time producing thermal energy that can be used in domestic applications. During the analysis of the results of the proposed system, it was found that the maximum electrical and thermal energy obtained were 170 W and 580 W, respectively, under solar concentration ratio 3 and the flow rate of the cooling water 1 kg/min. A good agreement between the theoretical and experimental results was confirmed.
Mohamed R. Gomaa; Mujahed Al-Dhaifallah; Ali Alahmer; Hegazy Rezk. Design, Modeling, and Experimental Investigation of Active Water Cooling Concentrating Photovoltaic System. Sustainability 2020, 12, 5392 .
AMA StyleMohamed R. Gomaa, Mujahed Al-Dhaifallah, Ali Alahmer, Hegazy Rezk. Design, Modeling, and Experimental Investigation of Active Water Cooling Concentrating Photovoltaic System. Sustainability. 2020; 12 (13):5392.
Chicago/Turabian StyleMohamed R. Gomaa; Mujahed Al-Dhaifallah; Ali Alahmer; Hegazy Rezk. 2020. "Design, Modeling, and Experimental Investigation of Active Water Cooling Concentrating Photovoltaic System." Sustainability 12, no. 13: 5392.
This study scrutinizes the reliability and validity of existing analyses that focus on the impact of various environmental factors on a photovoltaic (PV) system’s performance. For the first time, four environmental factors (the accumulation of dust, water droplets, birds’ droppings, and partial shading conditions) affecting system performance are investigated, simultaneously, in one study. The results obtained from this investigation demonstrate that the accumulation of dust, shading, and bird fouling has a significant effect on PV current and voltage, and consequently, the harvested PV energy. ‘Shading’ had the strongest influence on the efficiency of the PV modules. It was found that increasing the area of shading on a PV module surface by a quarter, half, and three quarters resulted in a power reduction of 33.7%, 45.1%, and 92.6%, respectively. However, results pertaining to the impact of water droplets on the PV panel had an inverse effect, decreasing the temperature of the PV panel, which led to an increase in the potential difference and improved the power output by at least 5.6%. Moreover, dust accumulation reduced the power output by 8.80% and the efficiency by 11.86%, while birds fouling the PV module surface was found to reduce the PV system performance by about 7.4%.
Ramadan J. Mustafa; Mohamed R. Gomaa; Mujahed Al-Dhaifallah; Hegazy Rezk. Environmental Impacts on the Performance of Solar Photovoltaic Systems. Sustainability 2020, 12, 608 .
AMA StyleRamadan J. Mustafa, Mohamed R. Gomaa, Mujahed Al-Dhaifallah, Hegazy Rezk. Environmental Impacts on the Performance of Solar Photovoltaic Systems. Sustainability. 2020; 12 (2):608.
Chicago/Turabian StyleRamadan J. Mustafa; Mohamed R. Gomaa; Mujahed Al-Dhaifallah; Hegazy Rezk. 2020. "Environmental Impacts on the Performance of Solar Photovoltaic Systems." Sustainability 12, no. 2: 608.
Energy is one of the most critical inputs for the development and economic growth. The objective of this study is to investigate the possibilities of fulfilling such global market demands, even going so far as to provide for a more reliable power source that can extend its reach to rural and remote areas. Therefore, in this work, investigating the gasification of carbonaceous materials (biomass materials) was conducted to produce syngas in a theoretically modelled solar reactor (fluidized bed) design. The Monte Carlo ray tracing method was utilized to design an indirectly irradiated fluidized bed solar reactor. This solar reactor was used in the co-gasification process of 50% olive-pomace and 50% lignite mixture to investigate the performance of gasification with changing the H2O: fuel and O2: fuel ratios. Such a solar reactor model approves the ability to use solar energy as the primary 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 the co-gasification process was aimed to investigate the solar reactor performance where the addition of lignite to olive-pomace played a significant role in reducing tar formation and increasing the gasification temperature. Monte Carlo ray tracing method presented the absorbed fluxes over a 40 × 40 mm area centre of the tube where the peak flux and average heat flux were 592.4 and 162.5 kW/m2, respectively. Also, the results indicated that, the optimum H2O: fuel and O2: fuel ratios were 1.16 and 0.33, respectively. The change of H2O: fuel ratio has less effect than the change of O2: fuel ratio in the co-gasification process.
Mohamed R. Gomaa; Nesrien Al-Dmour; Hani A. Al-Rawashdeh; Mohammad Shalby. Theoretical model of a fluidized bed solar reactor design with the aid of MCRT method and synthesis gas production. Renewable Energy 2019, 148, 91 -102.
AMA StyleMohamed R. Gomaa, Nesrien Al-Dmour, Hani A. Al-Rawashdeh, Mohammad Shalby. Theoretical model of a fluidized bed solar reactor design with the aid of MCRT method and synthesis gas production. Renewable Energy. 2019; 148 ():91-102.
Chicago/Turabian StyleMohamed R. Gomaa; Nesrien Al-Dmour; Hani A. Al-Rawashdeh; Mohammad Shalby. 2019. "Theoretical model of a fluidized bed solar reactor design with the aid of MCRT method and synthesis gas production." Renewable Energy 148, no. : 91-102.
Transitioning from fossil fuel based energy sources to more viable and alternative renewable energy sources requires intermediary methods that bridge the gap between existing technology and newer innovative renewable technologies. The objective here is to provide for a more reliable power source that can extend its reach to even the remotest rural areas. This paper provides a numerical method that tests the possibility of coupling a solar energy heat source with a co-gasification process dependent on biomass and coal for producing syngas throughout all hours of the day. A hybrid reactor that is modeled by the Monte Carlo ray tracing method for its geometric and maximum temperature is obtained in the cavity. Numerous factors were accounted for that determined the performance of the reaction in the indirectly irradiated fluidized bed solar reactor. The co-gasification modeling calculation utilized 50% lignite coal and 50% olive pomace with oxygen and steam to estimate the gasification performance parameters. The co-gasification process, using solar energy as the heat source, had in fact shown to produce clean syngas. Oxygen and steam were mixed to ensure the continuous production of syngas, as oxygen was critical in enabling some of the feedstock to be combusted during the low/absence of solar energy. The stoichiometric equilibrium model was also used to estimate the gasification performance and the effect of the gasifying agent ratios. The results also indicate that the effect of variation of O2: C ratio is an important factor that affects both the bed temperature and the carbon conversion, whilst the negative impact of combustion was apparent on the H2:CO, cold gas ratio, solar-fuel efficiency, and CO2 production. Changing H2O:C ratio was less apparent but still significant in the co-gasification process.
Mohamed R. Gomaa; Ramadan J. Mustafa; Nesrien Al-Dmour. Solar thermochemical conversion of carbonaceous materials into syngas by Co-Gasification. Journal of Cleaner Production 2019, 248, 119185 .
AMA StyleMohamed R. Gomaa, Ramadan J. Mustafa, Nesrien Al-Dmour. Solar thermochemical conversion of carbonaceous materials into syngas by Co-Gasification. Journal of Cleaner Production. 2019; 248 ():119185.
Chicago/Turabian StyleMohamed R. Gomaa; Ramadan J. Mustafa; Nesrien Al-Dmour. 2019. "Solar thermochemical conversion of carbonaceous materials into syngas by Co-Gasification." Journal of Cleaner Production 248, no. : 119185.
Hegazy Rezk; Mohamed R. Gomaa; Mohamed M. Marmoush; Nabila Shehata; Jean Henry. Corrigendum to “Theoretical and experimental performance investigation of a newly combined TDD and SWH system” [Appl. Therm. Eng. 160 (2019) 114156]. Applied Thermal Engineering 2019, 164, 114498 .
AMA StyleHegazy Rezk, Mohamed R. Gomaa, Mohamed M. Marmoush, Nabila Shehata, Jean Henry. Corrigendum to “Theoretical and experimental performance investigation of a newly combined TDD and SWH system” [Appl. Therm. Eng. 160 (2019) 114156]. Applied Thermal Engineering. 2019; 164 ():114498.
Chicago/Turabian StyleHegazy Rezk; Mohamed R. Gomaa; Mohamed M. Marmoush; Nabila Shehata; Jean Henry. 2019. "Corrigendum to “Theoretical and experimental performance investigation of a newly combined TDD and SWH system” [Appl. Therm. Eng. 160 (2019) 114156]." Applied Thermal Engineering 164, no. : 114498.
Hegazy Rezk; Mohamed R. Gomaa; Mohamed M. Marmoush; Nabila Shehata; Jean Henry. Theoretical and experimental performance investigation of a newly combined TDD and SWH system. Applied Thermal Engineering 2019, 161, 1 .
AMA StyleHegazy Rezk, Mohamed R. Gomaa, Mohamed M. Marmoush, Nabila Shehata, Jean Henry. Theoretical and experimental performance investigation of a newly combined TDD and SWH system. Applied Thermal Engineering. 2019; 161 ():1.
Chicago/Turabian StyleHegazy Rezk; Mohamed R. Gomaa; Mohamed M. Marmoush; Nabila Shehata; Jean Henry. 2019. "Theoretical and experimental performance investigation of a newly combined TDD and SWH system." Applied Thermal Engineering 161, no. : 1.
For an efficient energy harvesting by the PV/thermoelectric system, the maximum power point tracking (MPPT) principle is targeted, aiming to operate the system close to peak power point. Under a uniform distribution of the solar irradiance, there is only one maximum power point (MPP), which easily can be efficiently determined by any traditional MPPT method, such as the incremental conductance (INC). A different situation will occur for the non-uniform distribution of solar irradiance, where more than one MPP will exist on the power versus voltage plot of the PV/thermoelectric system. The determination of the global MPP cannot be achieved by conventional methods. To deal with this issue the application of soft computing techniques based on optimization algorithms is used. However, MPPT based on optimization algorithms is very tedious and time consuming, especially under normal conditions. To solve this dilemma, this research examines a hybrid MPPT method, consisting of an incremental conductance (INC) approach and a moth-flame optimizer (MFO), referred to as (INC-MFO) procedure, to reach high adaptability at different environmental conditions. In this way, the combination of the two different algorithms facilitates the utilization of the advantages of the two methods, thereby resulting in a faster speed tracking with uniform radiation distribution and a high accuracy in the case of a non-uniform distribution. It is very important to mention that the INC method is used to track the maximum power point under normal conditions, whereas the MFO optimizer is most relevant for the global search under partial shading. The obtained results revealed that the proposed strategy performed best in both of the dynamic and the steady-state conditions at uniform and non-uniform radiation.
Hegazy Rezk; Ziad Mohammed Ali; Omer Abdalla; Obai Younis; Mohamed Ramadan Gomaa; Mauia Hashim; Rezk; Ali. Hybrid Moth-Flame Optimization Algorithm and Incremental Conductance for Tracking Maximum Power of Solar PV/Thermoelectric System under Different Conditions. Mathematics 2019, 7, 875 .
AMA StyleHegazy Rezk, Ziad Mohammed Ali, Omer Abdalla, Obai Younis, Mohamed Ramadan Gomaa, Mauia Hashim, Rezk, Ali. Hybrid Moth-Flame Optimization Algorithm and Incremental Conductance for Tracking Maximum Power of Solar PV/Thermoelectric System under Different Conditions. Mathematics. 2019; 7 (10):875.
Chicago/Turabian StyleHegazy Rezk; Ziad Mohammed Ali; Omer Abdalla; Obai Younis; Mohamed Ramadan Gomaa; Mauia Hashim; Rezk; Ali. 2019. "Hybrid Moth-Flame Optimization Algorithm and Incremental Conductance for Tracking Maximum Power of Solar PV/Thermoelectric System under Different Conditions." Mathematics 7, no. 10: 875.
A novel statistical performance evaluation of most modern optimization-based global MPPT techniques for partially shaded PV system is presented in this paper. In recent years, there has been a growing attention toward mitigation of partial shading effect of the PV system through using modern optimization. The field of tracking MPP of the PV system attracts huge attention from the researchers, as it is the best way to increase PV plant efficiency. Under non-uniform solar irradiance, the power against voltage characteristics of PV array have more than one MPP. This condition leads to extra complications to track MPP and decreases the efficiency of the PV system. Traditional MPPT methods are typically used to increase the harvested energy of PV under normal conditions without any problems. The key drawback of such methods is failing extraction of global MPP under actual weather conditions that sometimes under shadowing condition. Several global MPPT methods based on modern optimization are presented for extracting global MPP in case of shadowing condition. The essential target of this work is not limited to present an integrated specific review on the state-of-the-art of these techniques; but also a comprehensive statistical evaluation of twenty optimizers that represent high percent of all the reported techniques is performed with changing shading scenarios. This work serves as a source of valuable information for researchers and engineers working with PV systems to keep abreast with the modern advance in the field of tracking MPP of PV system.
Hegazy Rezk; Mazen Al-Oran; Mohamed R. Gomaa; Mohamed A. Tolba; Ahmed Fathy; Mohammad Ali Abdelkareem; A.G. Olabi; Abou Hashema M. El-Sayed. A novel statistical performance evaluation of most modern optimization-based global MPPT techniques for partially shaded PV system. Renewable and Sustainable Energy Reviews 2019, 115, 109372 .
AMA StyleHegazy Rezk, Mazen Al-Oran, Mohamed R. Gomaa, Mohamed A. Tolba, Ahmed Fathy, Mohammad Ali Abdelkareem, A.G. Olabi, Abou Hashema M. El-Sayed. A novel statistical performance evaluation of most modern optimization-based global MPPT techniques for partially shaded PV system. Renewable and Sustainable Energy Reviews. 2019; 115 ():109372.
Chicago/Turabian StyleHegazy Rezk; Mazen Al-Oran; Mohamed R. Gomaa; Mohamed A. Tolba; Ahmed Fathy; Mohammad Ali Abdelkareem; A.G. Olabi; Abou Hashema M. El-Sayed. 2019. "A novel statistical performance evaluation of most modern optimization-based global MPPT techniques for partially shaded PV system." Renewable and Sustainable Energy Reviews 115, no. : 109372.
Integration of solar concentrators with photovoltaic (PV) systems reduces the required number of PV panels, which often account for the major costs of PV systems. The linear Fresnel reflector mirror is considered more effective because of its simplicity and effortless fabrication. An experimental test rig of a concentrated PV/thermal system that employs a linear configuration and horizontal absorber was built for evaluating its electrical and thermal performances. The considered concentrator consists of various widths of flat glass mirrors, which positioned with different angles, and with sun light focusing on the PV cells that fixed over an active cooling system. The experimental investigation of the proposed concentrated PV/thermal system shows that higher electrical and thermal efficiencies can be achieved at comparatively high temperature levels than that typically utilized in a nonconcentrated PV/thermal system. The characteristics of PV cells also indicate that the electrical efficiency values in case of no concentration and with concentration ratio of 6.0 are 9.6%, and 11%, respectively. The measured values for the inlet and outlet cooling water temperatures of the receiver showed that the maximum outlet temperature reached was 75°C with a flow rate of 0.025 L/min, and the product thermal efficiency was 62.3%. These obtained results illustrate an adequate and good thermal and electrical performance under the meteorological weather conditions of the province of Al‐Karak in Jordan.
Mohamed R. Gomaa; Ramadan J. Mustafa; Hegazy Rezk. An experimental implementation and testing of a concentrated hybrid photovoltaic/thermal system with monocrystalline solar cells using linear Fresnel reflected mirrors. International Journal of Energy Research 2019, 1 .
AMA StyleMohamed R. Gomaa, Ramadan J. Mustafa, Hegazy Rezk. An experimental implementation and testing of a concentrated hybrid photovoltaic/thermal system with monocrystalline solar cells using linear Fresnel reflected mirrors. International Journal of Energy Research. 2019; ():1.
Chicago/Turabian StyleMohamed R. Gomaa; Ramadan J. Mustafa; Hegazy Rezk. 2019. "An experimental implementation and testing of a concentrated hybrid photovoltaic/thermal system with monocrystalline solar cells using linear Fresnel reflected mirrors." International Journal of Energy Research , no. : 1.
The ever-increasing popularity of finding alternative forms of renewable energy has seen an increased interest and utilization of wind energy. The objective of this research therefore, is to evaluate the environmental impacts and energy performance of wind farms. This study was operationalized in Jordan using a life-cycle assessment (LCA) method. The environmental impact is evaluated through lifecycle emissions that include all emissions during various phases of the project. The energy performance is illustrated by the energy indicators. The latter is the energy payback ratio (EPR) and the energy payback time (EPT). This study was conducted on a 38 Vestas V112 3-MW wind turbine located in the southern region of Tafilah in Jordan that is host to the country’s first wind farm. SimaPro 7.1 software was used as the modeling platform. Data for this study were collated from various sources, including, manufacturers, the wind turbine farm, and local subcontractors. A software database was used for the modeling process, and the data obtained modeled in accordance with ISO 14040 standards. The findings of this study indicate that the impacts of the transportation and installation phases were moderate, with the largest negative environmental impact deriving from the manufacturing phase. To remedy some of the negative impacts in these phases, green cement was used for the turbine foundation to limit the environmental impacts to be had during the installation phase, while the transportation phase saw the utilization of locally-manufactured turbines. Furthermore, an evaluation of the study’s results revealed that the energy payback period of the wind farm is approximately 0.69 year (8 months), while the payback ratio is 29, and the annual CO2 saving estimated to be at 2.23 × 108 kg, 3.02 × 108 kg, 3.10 × 108 kg for an annual generated power of 371, 501, and 515 GWh/year.
Mohamed R. Gomaa; Hegazy Rezk; Ramadan J. Mustafa; Mujahed Al-Dhaifallah. Evaluating the Environmental Impacts and Energy Performance of a Wind Farm System Utilizing the Life-Cycle Assessment Method: A Practical Case Study. Energies 2019, 12, 3263 .
AMA StyleMohamed R. Gomaa, Hegazy Rezk, Ramadan J. Mustafa, Mujahed Al-Dhaifallah. Evaluating the Environmental Impacts and Energy Performance of a Wind Farm System Utilizing the Life-Cycle Assessment Method: A Practical Case Study. Energies. 2019; 12 (17):3263.
Chicago/Turabian StyleMohamed R. Gomaa; Hegazy Rezk; Ramadan J. Mustafa; Mujahed Al-Dhaifallah. 2019. "Evaluating the Environmental Impacts and Energy Performance of a Wind Farm System Utilizing the Life-Cycle Assessment Method: A Practical Case Study." Energies 12, no. 17: 3263.
The use of a concentrated photovoltaic (CPV) system significantly reduces the required solar cell area that often accounts for the major cost of a PV solar system. A comprehensive performance analysis of a multi-mirror solar concentrated hybrid PV thermal (CPVT) system was conducted. Among different concentrating systems, Linear Fresnel Reflector (LFR) systems are more effective due to their simplicity of operation and low fabrication cost. A mathematical model and the simulation of a CPVT system employing a linear configuration and horizontal absorber is developed here in order to evaluate its performance parameters, using a FORTRAN programing technique. The concentrator system consists of, different width of flat glass mirrors placed under various inclination angles, focusing sunlight on to the PV solar cells mounted along the active cooling system. The effect of focus distance on concentration ratio, collector width, and heat gained by the coolant fluid are investigated. All parameters of the linear Fresnel reflector solar concentrator system are determined and the effect of cooling mass flow rate and cooling inlet temperature upon the system performance is evaluated. With regards to simulation results obtained via the focus distances, the width of mirrors decreased by increasing the number of mirrors, and in turn by increasing the focus distances, this resulted in an increase in CR values. For the specific number of mirrors, concentration ratio increased simultaneously increasing the focus distance; furthermore, increasing the number of mirrors resulted in a reduction in both the width of the mirrors and their inclination angles, and an increase in CR values. The results further confirmed that the total (combined electrical-thermal) efficiency is higher than that of the individual electrical as well as thermal efficiency; reaching approximately 80% and showed no sensitivity to the rises in cooling water temperature for temperature cases under consideration.
Mohamed R. Gomaa; Ramadan J. Mustafa; Hegazy Rezk; Mujahed Al-Dhaifallah; A. Al-Salaymeh. Sizing Methodology of a Multi-Mirror Solar Concentrated Hybrid PV/Thermal System. Energies 2018, 11, 3276 .
AMA StyleMohamed R. Gomaa, Ramadan J. Mustafa, Hegazy Rezk, Mujahed Al-Dhaifallah, A. Al-Salaymeh. Sizing Methodology of a Multi-Mirror Solar Concentrated Hybrid PV/Thermal System. Energies. 2018; 11 (12):3276.
Chicago/Turabian StyleMohamed R. Gomaa; Ramadan J. Mustafa; Hegazy Rezk; Mujahed Al-Dhaifallah; A. Al-Salaymeh. 2018. "Sizing Methodology of a Multi-Mirror Solar Concentrated Hybrid PV/Thermal System." Energies 11, no. 12: 3276.
Tubular daylight device (TDD) and solar water heater (SWH) are two power saving solutions that are commonly employed individually in residential and industrial premises. This paper proposed a novel merged power saving system consisting of TDD and SWH in one model, which is the first attempt to integrate these two systems. The idea of merging the TDD with SWH is based on utilizing the existing area around the TDD to implement the SWH around the TDD tube through a serpentine collector. The main purpose for such integration is to enhance solar energy saving, space area saving, and to decrease the fabrication cost. The illumination and thermal performance of the new proposed model were tested and analysed experimentally in different seasons in Cairo - Egypt to assess its performance in practical use. The obtained results indicated that the merged system succeeded in transferring an acceptable illumination rate and increasing the water temperature. The transferred internal illuminance has reached approximately to 6.5 W/m2 that fulfils the required needs of lighting. Additionally, the system increased the water temperature up to 62 ºC, with a performance instantaneous efficiency that reached 21.17% which is very satisfactory. Furthermore, the performance of thermosyphon SWH with different serpentine collector coil number of turns has been evaluated. The results proved that, the collector number of turns has significantly affected the SWH performance in a directly proportional relation.
Mohamed M. Marmoush; Hegazy Rezk; Nabila Shehata; Jean Henry; Mohamed R. Gomaa. A novel merging Tubular Daylight Device with Solar Water Heater – Experimental study. Renewable Energy 2018, 125, 947 -961.
AMA StyleMohamed M. Marmoush, Hegazy Rezk, Nabila Shehata, Jean Henry, Mohamed R. Gomaa. A novel merging Tubular Daylight Device with Solar Water Heater – Experimental study. Renewable Energy. 2018; 125 ():947-961.
Chicago/Turabian StyleMohamed M. Marmoush; Hegazy Rezk; Nabila Shehata; Jean Henry; Mohamed R. Gomaa. 2018. "A novel merging Tubular Daylight Device with Solar Water Heater – Experimental study." Renewable Energy 125, no. : 947-961.