The History of Electricity

Collected By:

Abd-Alhady Mostafa Abd-Alhalem Abozeid

3^rd Year of Mechanical power branch (Mech. dep.)

1^st Group - Section: 6 - Bn#133

Contents

Georg Simon Ohm and Resistance. 2

Gustav Robert Kirchhoff 3

Luigi Galvani and the Discovery of Nerve Excitation. 4

Benjamin Franklin. 4

Sir Charles Wheatstone. 5

André Marie Ampère. 5

Michael Faraday and the Field Concept 6

Magnetism and Electromagnetism.. 7

The Discovery of Electromagnetic Induction. 7

Thomas Alva Edison. 8

Charles Proteus Steinmetz. 9

Henry Cavendish. 10

Heinrich Rudolph Hertz. 10

Hermann Ludwig Ferdinand von Helmholtz. 11

William Bradford Shockley. 12

Edwin Howard Armstrong—Radio Reception. 12

Alexander Graham Bell 13

Nikola Tesla. 14

George Westinghouse. 14

Jean Baptiste Joseph Fourier 15

References 16

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Centrifugal Pumps

Basic Concepts of Operation, Maintenance, and Troubleshooting

Collected By:

Abd-Alhady Mostafa Abd-Alhalem Abozeid

3^rd Year of Mechanical power branch (Mech. dep.)

1^st Group - Section: 6 - Bn#133

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Contents

Introduction. 2

Working Mechanism of a Centrifugal Pump.. 3

Generation of Centrifugal Force.. 3

Conversion of Kinetic Energy to Pressure Energy. 4

General Components of Centrifugal Pumps. 5

Stationary Components. 6

Rotating Components. 9

Auxiliary Components. 11

Definition of Important Terms. 12

Capacity. 12

Head.. 13

NPSH.. 15

Power and Efficiency. 18

Specific Speed.. 19

The Affinity Laws. 21

Understanding Centrifugal Pump Performance Curves. 22

Developing a system curve.. 22

Developing a Pump performance Curve.. 23

Normal Operating Range.. 23

Two Basic Requirements for Trouble-Free Operation of Centrifugal Pumps. 23

References. 24

Attention. 24

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The history of

Measurements

Report

Some human-referenced units of measurements

  

By

Abd Al-hady Moustafa Abd Al-halem Abo-zeid Habib

3^rd Year of Mechanical power branch (Mech. dep.)

2^nd Group

Section: 6 - Bn#133

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Benha University

Mechanical Department

Power Branch

The history of

Fluid Mechanics

Report

The history of fluid mechanics, the study of how fluids move and the forces on them, dates back to the Ancient Greeks.

Submitted to

Prof. Dr. Osama Ezzat Abdel-Latif

 

By

Abd Al-hady Moustafa Abd Al-halem Abo-zeid Habib

3^rd Year of Mechanical power branch (Mech. dep.)

2^nd Group

Section: 6

Bn#133

Contents

• 1 Ancient and medieval era
• 1.1 Archimedes
• 1.2 The Alexandrian school
• 1.3 Sextus Julius Frontinus
• 2 Sixteenth, seventeenth and eighteenth century
• 2.1 Castelli and Torricelli
• 2.2 Blaise Pascal
• 2.3 Mariotte and Guglielmini
• 2.4 Studies by Isaac Newton
• 2.4.1 Friction and viscosity
• 2.4.2 Orifices
• 2.4.3 Waves
• 2.5 Daniel Bernoulli
• 2.6 Jean le Rond d'Alembert
• 2.7 Leonhard Euler
• 2.8 Pierre Louis Georges Dubuat
• 3 Nineteenth century
• 3.1 Gaspard Riche de Prony
• 3.2 Johann Albert Eytelwein
• 3.3 Jean Nicolas Pierre Hachette and others
• 3.4 Andreas Rudolf Harlacher and others
• 4 References

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Heat Exchangers & Concrete Pumps

Collected By:

Abd-Alhady Mostafa Abd-Alhalem Abozeid

3^rd Year of Mechanical power branch (Mech. dep.)

1^st Group - Section: 6 - Bn#133

Contents

Heat Exchangers   2

Types of heat exchangers  3

Shell and Tube heat exchanger  3

Regenerative heat exchanger  5

Adiabatic Wheel heat exchanger  5

Fluid heat exchangers  5

Dynamic Scraped surface heat exchanger  5

Phase-change heat exchangers  6

HVAC air coils  7

Spiral Heat Exchangers  8

Self cleaning    9

Applications  9

Selection   9

Monitoring and maintenance  10

Fouling    10

Maintenance  11

Heat exchangers in nature  11

Counter current Heat Exchangers  11

Heat Exchangers in Industry  11

What Is a Concrete Pump?   14

Truck-mounted concrete pump  16

Hydraulic system features  18

Pictures  19

Main technical parameters  21

References   24