Mohamed R. Gomaa

Mohamed R. Gomaa
Al-Hussein Bin Talal University | AHU · Department of Mechanical Engineering

PhD

About

40
Publications
12,024
Reads
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400
Citations
Introduction
I am currently employing as Assis. Prof. of Thermal and Renewable energy, Mechanical Engineering at Benha Faculty of Engineering, Benha University, Banha, Egypt. I have awarded my PhD from SEUA (Polytechnic), Yerevan, Armenia on December 2012 in the field of Renewable Energy Systems. I had completed my MSc in the field of Fluid Mechanics on March 2007 from El-Minia University, Egypt. Currently, my research interests in the field of Thermal and Renewable energy systems, absorption, desalination and air-conditioning systems.
Additional affiliations
July 2020 - present
Benha University
Position
  • Professor (Associate)
September 2016 - present
Mu’tah University
Position
  • Professor (Assistant)
January 2012 - November 2015
Benha University
Position
  • Professor (Assistant)

Publications

Publications (40)
Article
Ethylene glycol is a widely utilized chemical in many industrial demands. Therefore, the current study investigates the effect of the addition of Er2O3‐based EG (Er2O3/EG) nanofluid on thermal conductivity. The effects of nanoparticle concentration at different solid volume fractions (0, 0.0625, 0.125, 0.25, and 0.5%) were examined at a temperature...
Article
Many wind turbines have been deployed in different regions of Jordan; most are located in southern Jordan, which has a desert climate. In one of these farms near Ma'an city, the operators noticed a frequent temperature increase (+2°C) due to clogged air nacelle filters during the dust period, which caused decreasing cooling efficiency. This led to...
Article
Full-text available
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 ai...
Article
Full-text available
Solid particles scattered in a base fluid for a standard no larger than 100 nm, constituting a nanofluid, can be used to improve thermophysical characteristics compared to the base fluid. In this study, theoretical and experimental investigations were carried out to estimate the density, viscosity, and effective thermal conductivity of Co3O4 in dis...
Article
Full-text available
The refrigeration systems consume a high amount of energy. In Jordan, conventional energy is an expensive option. Thus, this consumption will be significant. In this work, a mathematical model of the Single-Effect Solar Absorption Cooling system (SESAC), utilizing Lithium Bromide-Water (LiBr–H2O) as the working fluid, has been developed with evacua...
Article
Full-text available
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...
Article
Full-text available
Biodiesel is considered to be a promising alternative option to diesel fuel. The main contribution of the current work is to improve compression ignition engine performance, fueled by several biodiesel blends. Three metrics were used to evaluate the output performance of the compression ignition engine, as follows: brake torque (BT), brake specific...
Article
Full-text available
During hot days, the temperature inside vehicles parked under the sun is very high; according to previous studies, the vehicle cabin temperature can be more than 20 °C higher than the ambient temperature. Due to the greenhouse effect, the heating that occurs inside a vehicle while it is parked under the sun has an impact on energy crises and enviro...
Article
Full-text available
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) hav...
Article
Full-text available
Many aspects relating to thermal, economic, and reliability challenges are involved while designing a Photovoltaic/Thermal (PV/T) system under high performance. When compared to standard PV systems, PV/T systems are more effective in locations with high irradiance. To eliminate the excess heat from a PVT system, an optimal cooling system is necessa...
Article
This study aims to practically verify the effect of environmental factors on the efficiency of the solar cells, these factors that affect the performance of the cells have been tested, including the accumulation of dust on the cell surfaces, remnants of birds and/or birds dropping, in addition to the shadow caused by surrounding buildings or trees...
Article
Full-text available
Herein, we investigated and analysed the performance and characteristics of a compression ignition engine on methanol/diesel blends and the impact of engine loads on tailpipe emissions and engine performance. Four combinations of blended methanol were tested and compared with pure diesel. Engine characteristics, such as: brake thermal efficiency, b...
Article
Full-text available
An innovative solar desalination system was designed, constructed, and tested to produce more freshwater than a conventional solar still system. The new system consists of a basin type solar still and an external condenser. The condenser itself contains finned condensing pipes and a reservoir for the cooling water. The effects number of the fins, v...
Article
Full-text available
This research paper examines the prospect of recovering the waste heat released from the industrial sector using thermoelectric generators. A practical case study of waste heat recovery from cement rotary kiln is applied. Arrays of TEGs can be longitudinally erected on secondary coaxial shell separated from kiln shell via an air gap. An experimenta...
Article
Full-text available
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 he...
Article
Full-text available
Objective Energy is one of the most significant inputs for development and economic growth. Jordan faces big internal and regional challenges concerns. One of these challenges is the growing Electricity demand, which accompanied by a shortage of available natural resources. Locally, Jordan is generating very limited Electrical energy that contribut...
Article
Full-text available
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 m...
Article
Full-text available
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,...
Article
Full-text available
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 byproducts produced during the ignition cycle and its subsequent environmental effects. Alternatively, this study examines the ways in which a hydrogen engine cavitation can be...
Article
Full-text available
The performance of a solar photovoltaic (PV) panel is examined through determining its internal parameters based on single and double diode models. The environmental conditions such as temperature and the level of radiation also influence the output characteristics of solar panel. In this research work, the parameters of solar PV panel are identifi...
Article
Full-text available
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...
Article
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...
Article
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...
Article
Full-text available
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 MP...
Article
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...
Article
Full-text available
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 em...
Article
Full-text available
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. T...
Article
This research investigates the theoretical and experimental performance of the newly combined TDD/SWH (Tubular Daylight Device and Solar Water Heating) system. A novel proposed system was implemented to convert solar energy into two useful energies; light and heat simultaneously under climatic circumstances of Egypt with the same occupied space. A...
Article
Full-text available
Abstract – The recent surge in environmental awareness along with the increased cost of electricity generation has spurred the need for clean energy sources. This has generated significant interest over the last few years via research, investigation, and evaluation looking for sustainable and economical energy sources. The intended objective is...
Article
Full-text available
The recent surge in environmental awareness along with the increased cost of electricity generation has spurred the need for clean energy sources. This has generated significant interest over the last few years via research, investigation, and evaluation looking for sustainable and economical energy sources. The intended objective is to alleviate s...
Article
Full-text available
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 (...
Article
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 TD...
Book
Full-text available
The flow behavior through an asymmetric diffuser is investigated in the present study. The shapes of the inlet velocity profile on the diffuser performance are studied and the flow is treated as two dimensional. From the present study it was found that the used level of the Re, the diffuser angle, the aspect ratio, and the walls connection are main...
Research
Full-text available
إنطلاقا من دور جامعة بنها فى خدمة المجتمع وتنمية البيئة والمساهمة فى حل أزمة الطاقة التى تمر بها البلاد من نقص للوقود مع زيادة أسعاره ، وما يترتب على إستخدام الوقود من أضرار بيئية وصحية للإنسان، وحيث أن المبانى الحكومية تشكل عبئأ فى هذه الازمة فإنه يتم الإتجاه الآن إلى إستخدام الطاقات المتجدده. والطاقات المتجددة من الطاقات التى يتجه إليها كل العالم...
Article
Full-text available
Flow through diffusers in general is of great importance in many engineering applications. The flow in an asymmetric diffuser has been studied experimentally and numerically. The diffuser has an opening angle of 8 o , area ratio of 4.7, and an inlet aspect ratio of 4. Measurements are carried out to determine the diffuser performance with fully dev...
Article
Flow through diffusers in general is of great importance in many engineering applications. The flow in an asymmetric diffuser has been studied experimentally and numerically. The diffuser has an opening angle of 8 Deg., area ratio of 4.7, and an inlet aspect ratio of 4. Measurements are carried out to determine the diffuser performance with fully d...

Questions

Questions (6)
Question
I want some one to help me ......
I need software to help me to draw similar components as in photo attached......
Question
We want explanation for PV module ...... (Thermal resistance, equations of temperature, and quantity of heat for PV module under different cooling methods) If possible ???
Question
My question on how to calculate the exergy and efficiency for a flat plate solar collector.......
Question
Where I can found your modeling on solar dust??
Thanks a lot....
for forward
Question
I would need data which is spectrally resolved and with measurements on an hourly basis.
The data needs to be experimental and/or a simulation for Egypt, so if someone knows where I could find it I would really appreciate.

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Project (1)
Project
The Guest Editors are inviting submissions to a special issue of the Processes Journal on “Photovoltaic (PV) Systems: Modelling, Measurement, and Assessment”. The Processes Journal (IF: 3.352; CiteScore: 3.5). *Special Issue Description* This Special Issue, Photovoltaic Systems: Modelling, Control, Measurement, and Applications, seeks high-quality works and will consider manuscripts that provide concepts or methodologies that can be utilized for improving the performance of PV systems. We are collecting the advancements from novel; original research works as well as reviews. The scope of interest includes, but it is not limited to, the following topics: • PV systems characterization and modelling; • Advanced control algorithms and optimization techniques; • Energy-storage materials and devices (hydrogen production and storage, supercapacitors, lithium-ion batteries, sodium/potassium-ion batteries, lithium–sulfur batteries, metal–air batteries, fuel cells, etc.); • Energy management strategies; • Application of PV systems; • Energy efficiency; • PV/thermal systems; • Concentrating PV/thermal systems; • PV/thermoelectric generator systems; • Modelling PV/thermal systems; • Hybrid renewable systems. More information can be found at the Special Issue link: https://www.mdpi.com/journal/processes/special_issues/4Z1E7I9220 *How to Submit* Manuscripts are expected to be submitted through the online system at https://www.mdpi.com/journal/processes/special_issues/4Z1E7I9220, then choose “submit to special issue” *Notice*: All articles published in Processes (ISSN 2227-9717, IF:3.352, CiteScore 3.5) are published in full open access. In order to provide free access to readers, and to cover the costs of peer review, copyediting, typesetting, long-term archiving, and journal management, an article processing charge (APC) of CHF 2000 (Swiss francs) applies to papers accepted after peer review. The Guest Editors will try to bring discount for all submitted papers. *Rapid publication*: manuscripts are peer-reviewed and a first decision provided to authors approximately 15.2 days after submission; acceptance to publication is undertaken in 3.3 days. https://www.mdpi.com/journal/processes Please do not hesitate to get in touch with me if you require additional information. Best Wishes, Dr. Gaber Magdy Dr. Mohamed R. Gomaa Guest Editors