Abd elhady mohamed (25 risultati)

Condizione: New.

Condizione: New.

Condizione: New.

Condizione: New. pp. 184.

Taschenbuch. Condizione: Neu. Gas-Side Particulate Fouling in Biomass Gasifiers | Particulate Fouling in Heat Exchangers | Mohamed Abd-Elhady | Taschenbuch | 184 S. | Englisch | 2010 | LAP LAMBERT Academic Publishing | EAN 9783843371605 | Verantwortliche Person für die EU: BoD - Books on Demand, In de Tarpen 42, 22848 Norderstedt, info[at]bod[dot]de | Anbieter: preigu.…

Paperback. Condizione: Like New. LIKE NEW. SHIPS FROM MULTIPLE LOCATIONS. book.

paperback. Condizione: New. NEW. SHIPS FROM MULTIPLE LOCATIONS. book.

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Many factors affect the performance of photovoltaic (PV) panels such as dust accumulation and overheating. Dust accumulation on PV panels can obscure the solar radiation and reduce the efficiency of the panels dramatically. Heating of PV panels due to excessive solar radiation and high ambient temperature reduces the efficiency of the panels significantly. The main objective of this study is to solve the problems of dust accumulation and overheating using the minimum amount of water and energy. These two issues are tackled by developing a system that can clean the PV panels from deposited dust and at the same time cools the panels. It was found that the efficiency of the PV panels has decreased after 45 days of cleaning using non pressurized water, while the efficiency remained constant when a mixture of anionic and cationic surfactants was used. A mathematical model has been used to determine when to start cooling of the PV panels as the temperature of the panels reaches the maximum allowable temperature. A cooling model has been developed to determine how long it takes to cool the PV panels to its operating temperature.…

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Particulate fouling is defined as the accumulation of particles on a heat exchanger-surface forming an insulating powdery layer. Particulate fouling in biomass gasifiers is a major problem that may lead to inefficient operation, and it shows an asymptotic growth rate with a levelling off increase of the thickness. The fouling growth rate is determined by the difference between the deposition and the removal rate of particles on and from the fouling layer respectively. Till now, most attention has been given to the deposition process. The objective of this research project is to study and model removal of particles from particulate fouling layers as a function of the fouling layer structure. By integrating the removal rate and the depositing rate a complete perspective can be given about the fouling process. The removal and deposition of particles from particulate fouling layers as a function of the fouling layer structure have been numerically modelled and the model is experimentally validated. By combining the numerical model together with a CFD-particle transport model, the growth rate of the particulate fouling layer around a heat exchanger tube can be quantitatively predicted. 184 pp. Englisch.…

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Moharram KhaledK.A. Moharram received his B.Sc. degree in Mechatronics Engineering in 2011 from the German University in Cairo (GUC), Egypt. He received his M.Sc. degree under the supervision of Dr.M.S. Abd-Elhady, Dr. H. Kandil and .…

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Sharaf Eldin Seif EldinSeif Eldin has a bachelor degree in engineering in 2012 from the German University in Cairo, Master of Science focusing on the renewable & sustainable energy from the German University in Cairo. Now Seif Eldin . …

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Amir RamyRamy Amir is a lecturer assistant and Ph.D. student since July 2018 in the field of renewable energy at the department of mechatronics at the German university in Cairo, Egypt. He started as a teaching assistant in 2014. He .…

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: ElMessiry YoussefYoussef ElMessiry is a master s degree holder with a great passion for energy and sustainability.Due to the nature of the weather in the Middle East and North Africa (MENA) region, the performance of wind turbine.…

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Due to the nature of the weather in the Middle East and North Africa (MENA) region, the performance of wind turbines is affected by dust accumulation on the surface of the airfoil leading to a change in the geometry. Wind turbines are also affected by erosion, occurring mostly on the blade edges. The current work aims to study the effect of particulate deposition and surface erosion on the aerodynamic performance of wind turbines. Flows past clean and fouled airfoil sections were simulated using a CFD model at various angles of attack at a constant wind speed. Reynolds-Averaged-Navier-Stokes (RANS) equations are used along with the Shear Stress Transport (SST) k turbulence model to investigate the incompressible viscous flow over two-dimensional airfoil sections. The computational results were benchmarked against wind tunnel measurements to validate the effectiveness of the model. Then, the sliding ratios of clean and affected airfoils were calculated to examine the influence of deposits and leading-edge erosion on the aerodynamics of the airfoil.…

Condizione: New. Print on Demand.

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Abd-Elhady MohamedM.S. Abd-Elhady is an assistant Professor since July 2006 in the field of Energy Technology at the department of Mechanical Engineering in Beni-Suief Uni., Egypt. He started as a research assistant in October 1995 w.…

Condizione: New. Print on Demand.

Condizione: New. PRINT ON DEMAND.

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Particulate fouling is defined as the accumulation of particles on a heat exchanger-surface forming an insulating powdery layer. Particulate fouling in biomass gasifiers is a major problem that may lead to inefficient operation, and it shows an asymptotic growth rate with a levelling off increase of the thickness. The fouling growth rate is determined by the difference between the deposition and the removal rate of particles on and from the fouling layer respectively. Till now, most attention has been given to the deposition process. The objective of this research project is to study and model removal of particles from particulate fouling layers as a function of the fouling layer structure. By integrating the removal rate and the depositing rate a complete perspective can be given about the fouling process. The removal and deposition of particles from particulate fouling layers as a function of the fouling layer structure have been numerically modelled and the model is experimentally validated. By combining the numerical model together with a CFD-particle transport model, the growth rate of the particulate fouling layer around a heat exchanger tube can be quantitatively predicted.…

Condizione: New. PRINT ON DEMAND.

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - In this book, the synthesis of bioactive heterocyclic compounds as nonionic surfactants was studied. This study included three parts:1. Studying synthesis and reactions of enaminonitriles in producing various heterocyclic compounds using saturated fatty acids.2. Studying preparation of nonionic surface-active agents through the propoxylation process3. Studying the evaluation of the surface proprieties and biological activity of these compounds to determine using them in various industrial and applied fields.…

Condizione: New. Print on Demand pp. 184 2:B&W 6 x 9 in or 229 x 152 mm Perfect Bound on Creme w/Gloss Lam.

Condizione: New. PRINT ON DEMAND pp. 184.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Particulate fouling is defined as the accumulation of particles on a heat exchanger-surface forming an insulating powdery layer. Particulate fouling in biomass gasifiers is a major problem that may lead to inefficient operation, and it shows an asymptotic growth rate with a levelling off increase of the thickness. The fouling growth rate is determined by the difference between the deposition and the removal rate of particles on and from the fouling layer respectively. Till now, most attention has been given to the deposition process. The objective of this research project is to study and model removal of particles from particulate fouling layers as a function of the fouling layer structure. By integrating the removal rate and the depositing rate a complete perspective can be given about the fouling process. The removal and deposition of particles from particulate fouling layers as a function of the fouling layer structure have been numerically modelled and the model is experimentally validated. By combining the numerical model together with a CFD-particle transport model, the growth rate of the particulate fouling layer around a heat exchanger tube can be quantitatively predicted.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 184 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Many factors affect the performance of photovoltaic (PV) panels such as dust accumulation and overheating. Dust accumulation on PV panels can obscure the solar radiation and reduce the efficiency of the panels dramatically. Heating of PV panels due to excessive solar radiation and high ambient temperature reduces the efficiency of the panels significantly. The main objective of this study is to solve the problems of dust accumulation and overheating using the minimum amount of water and energy. These two issues are tackled by developing a system that can clean the PV panels from deposited dust and at the same time cools the panels. It was found that the efficiency of the PV panels has decreased after 45 days of cleaning using non pressurized water, while the efficiency remained constant when a mixture of anionic and cationic surfactants was used. A mathematical model has been used to determine when to start cooling of the PV panels as the temperature of the panels reaches the maximum allowable temperature. A cooling model has been developed to determine how long it takes to cool the PV panels to its operating temperature.OmniScriptum SRL, Str. Armeneasca 28/1, office 1, 2012 Chisinau 132 pp. Englisch.…