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Ahmed A.A. Attia

Ahmed A.A. Attia
Benha University · Department of Mechanical Engineering (Faculty of Engineering at Shoubra)

PhD

About

45
Publications
10,996
Reads
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428
Citations
Additional affiliations
May 1997 - present
Benha University
Position
  • Professor (Full)
Education
November 1997 - February 2003
Benha University- Shoubra Faculty of Engineering
Field of study
  • Mechanical Engineering

Publications

Publications (45)
Article
Cooling temperature-sensitive appliances, such as electronic components, has recently become essential in their design and development to reduce the negative effect of excessive temperature rise on performance. The current experiment focuses on passive cooling of electronic devices utilizing an innovative vapor chamber with a cylindrical cross-sect...
Article
Full-text available
Enhancement of heat transfer in tubes exposed to non-uniform heat flux applications is a key factor in increasing such applications' efficiency. In the present study, heat transfer in an axially rotating pipe with concentrated heat flux at the lower section of the pipe is numerically investigated and compared to the twisting technique in such appli...
Article
A lot of research is being done on the movement of vehicles, especially at high speeds, to maintain safe and stable driving on highways. To reduce traffic congestion, reduce fuel consumption, reduce pollution, and increase safety. It was proposed in the current work to install an internal air duct in the vehicle that is controlled by the left and r...
Article
Full-text available
Concentrator photovoltaic technology (CPV) use solar concentrators to maximize incident solar energy and hence create more electricity per unit area. However, increasing the solar incident irradiance raises the temperature of the solar cell and consequently reduces its efficiency. The current study uses the Thermo Electric Generator (TEG) as a pass...
Article
A newly designed freezing desalination system was constructed. The system operates on the principle of reversed vapor compression. It is equipped with two identical heat exchangers, one of them works as an evaporator and the other as a condenser. A three-way valve was used to reverse the operation of heat exchangers, causing the ice in the evaporat...
Article
For reasons of the intermittent nature of electricity produced by renewable power plants, the analysis and design of an efficient energy storage system (ESS) are becoming a point of interest. The current paper presents a simulation-based analysis to find the best dimensions of the gravity ESS. The considered system is the piston in cylinder pumped...
Article
Full-text available
Increasing the energy demand and the limited availability of conventional energy sources are the main challenges to secure the human future. Solar energy is an attractive source of energy to ensure the sustainability of energy in this world for now and for the future. Evacuated tube solar collector is a solar thermal collector mostly used for domes...
Article
Freezing desalination is one of the recent technologies that tries to contribute in water shortage problems. The idea of desalination by freezing is quite new and still needs more deep investigation for better understanding and proposing new enhancements in the system’s technology. This paper aims to present exergy and parametric analysis for diffe...
Article
Freezing desalination is one of the recent technologies that tries to contribute in water shortage problems. The idea of desalination by freezing is quite new and still needs more deep investigation for better understanding and proposing new enhancements in the system’s technology. This paper aims to present exergy and parametric analysis for diffe...
Article
Cool Storage is a well-known technique that been used to increase the energy efficiency of cooling systems. This paper represents a novel experimental work for the effect of internal capsules surface roughness on the performance of encapsulated cool storage systems. In this study, distilled water was used as a phase change material inside capsules....
Article
Ignition timing is heavily related to flame speed, which has great effect on SI engines performance. Due to that the flame speed for the fuel mixture that was formed by adding hydrogen to the traditional fuel was greatly changed, the ignition timing should be changed to attain suitable performance of the engine when used this mixture of fuels. The...
Article
Ignition timing is heavily related to flame speed, which has great effect on SI engines performance. Due to that the flame speed for the fuel mixture that was formed by adding hydrogen to the traditional fuel was greatly changed, the ignition timing should be changed to attain suitable performance of the engine when used this mixture of fuels. The...
Conference Paper
Steam process is one of the most beneficial thermal enhanced oil recovery (TEOR) techniques, which is applied for heavy oil reservoirs to decrease viscosity, thus increasing the production rate. Traditionally, producing steam for TEOR requires consumption of massive amount of natural gas. Issaran Field is one of the largest heavy and extra heavy oi...
Article
An investigation on performance of Nano Phase Change Material (NPCM) - (water as PCM and 50 nm Al2O3) - in a spherical capsule is carried out. Both the inlet temperature and volume flow rate of heat transfer fluid (HTF)-(Aqua-ethylene glycol solution is used as a HTF)- are varied to maintain the capsule wall temperature constant at a temperature ra...
Conference Paper
The world is still dependent on fossil fuels as a continuous and stable energy source, but rising concerns for depletion of these fuels and the steady increase in demand for clean “green” energy have led to the rapid growth of the renewable energy field. As one of the most available energy sources with high energy conversion efficiency, solar energ...
Article
Passive vacuum system helps seawater distillation using traditional refrigerant heat pumps. • Passive vacuum system reducing the saturation temperature of seawater. • The system is suitable for remote areas and could be designed and installed in different sizes. • The system gives promising competitive energy consumption with other techniques. a b...
Article
In the following an experimental investigation on a single-cylinder four-stroke spark ignition engine operating with gasoline was performed to study the effect of hydrogen addition to fuel on its performance and emissions. The hydrogen was inducted in the air inlet manifold with different volume ratios 24%, 26%, 27%, 28%, 29%, 31%, 35%, 37%, 49% pe...
Conference Paper
A numerical investigation for shell and tube heat exchanger using Fluent commercial package to build a reliable model for simulating the heat transfer and friction characteristics of heat exchangers, the model were validated with the literature and show a good agreement which result that this model can be accounted as a good CFD model for heat exch...
Article
Full-text available
In the present paper, simulation for shell and tube heat exchanger investigated using CFD techniques. Numerical simulations of the turbulent, three-dimensional fluid flow and heat transfer are performed using Ansys Fluent 6.3. The effect of friction characteristics on the model of heat exchanger is discussed. A RNG κ-ε turbulence model with non-equ...
Conference Paper
The effect of magnetic field has attracted many researchers to investigate the impact of this type of force on different applications such as combustion and water. Different systems supported by many patents were introduced to the market to treat these applications. In the present study, a series of experiments were conducted to explore the impact...
Article
As Natural resources are becoming limited and energy price dramatically increased, energy utilization with efficient systems is essentially required to be used in desalination technologies. The use of solar energy in desalination processes is one of the most promising applications of renewable energies. The primary focus on desalination by solar en...
Article
Full-text available
Vapor chamber is one of highly effective thermally spread techniques in electronic cooling. In the following a work is conducted to evaluate thermal performance of 2.0 mm high and 50 mm diameter vapor chamber with water and methyl alcohol at different charge ratios. Also, a solution of water and Propylene Glycol at two concentration 50%, 15% were t...
Article
Full-text available
Solar system converts solar energy into usable energy form. Total energy gain depends on the total amount of radiation that strikes radiation collecting surface and this amount depends strongly on tilt angle. In the present study, the radiation collecting surface tilt angle was studied through two approach of study. First approach through getting t...
Article
As natural resources are becoming limited and energy price dramatically increased, energy utilization with efficient systems is required to be used in desalination technologies. Freezing is a well known technique for water desalination. In the present paper, a new proposed system depends on optimization of utilizing the heat flow of heat pump syste...
Conference Paper
Full-text available
A fuel tank is a part of an engine system in which the fuel is stored and propelled (fuel pump) into the engine. Fuel tanks range in size and design according to the car model. Fuel may contain water or impurities which affect the tank material and/or piping system (corrosion, clogging, wear of seizure of precision parts) and in some cases the burn...

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Projects

Projects (4)
Archived project
Study of Solar Energy Application in Enhanced Oil Recovery
Project
Thermal management of temperature-sensitive electronic devices through the use of passive cooling techniques such as vapor chambers, heat pipes, PCMs, and finned heat sinks.