Energy
Conversion
Dr. Hany Abdo
Dr. Mohamed Ali Dawod
Dr. Saeed El masry
Total
Course contents:
Chapter 1: Energy Principles And
Applications
Chapter 2: Power Plants
Chapter 3: Batteries and fuel cells
Chapter 4: magnetic circuits
Chapter 5: Forces and fields in
electromagnetic circuits
Dr. Hany Abdo
• السيرة الذاتية:
• االسم :هانئ عبده
• المؤهل :دكتوراه في هندسة الطاقة
الكهربائية -جامعة آخن -المانيا
• الوظيفة :أستاذ متفرغ بقسم القوى واآلالت
الكهربائية -كلية الهندسة-جامعة حلوان
المؤهالت العلمية:
:1978-1973بكالوريوس هندسة القوى واآلالت الكهربائية -
كلية الهندسة جامعة القاهرة
:1983-1980ماجستير هندسة القوى الكهربائية -كلية
الهندسة جامعة القاهرة،
:1992-1986دكتوراه في هندسة الطاقة الكهربائية من
جامعة آخن -المانيا الغربية.
خبرات التدريس:
أوالا :جامعة حلوان(:أ)كلية الهندسة(ب)الفنون التطبيقية
ثانيا ا :جامعة آخن التكنولوجية (آخن -المانيا)
ثالثا ا :أ -جامعة 6أكتوبر
رابعا :كلية االتصاالت وااللكترونيات بجده (السعودية)
خامسا :اكاديمية الشروق
Chapter 1
Energy Principles
And Applications
Energy:
Forms and
Changes
Nature of Energy
• Energy is all around you!
–You can hear energy as sound.
–You can see energy as light.
–And you can feel it as wind.
Cont. Nature of Energy
• You use energy when you:
–Kick a football.
–lift your bag.
–compress a spring.
Cont. Nature of Energy
Living organisms need energy for
growth and movement.
Cont. Nature of Energy
• Energy is involved when:
–a bird flies.
–a bomb explodes.
–rain falls from the sky.
–electricity flows in a wire.
Cont. Nature of Energy
• What is energy that it can be involved
in so many different activities?
– Energy can be defined as:
– If an object or organism does work
(exerts a force over a distance to move
an object) the object or organism uses
energy.
Cont. Nature of Energy
• Because of the direct connection
between energy and work, energy is
measured in the same unit as work:
joules (J).
• In addition to using energy to do
work: - objects gain energy because
work is being done on them.
- objects lose energy because work is
being done by them.
Forms of Energy
• The five main forms of energy
are:
– Heat
– Chemical
– Electromagnetic
– Nuclear
– Mechanical
Heat Energy
• The internal motion of the atoms is
called heat energy, because moving
particles produce heat.
• Heat energy can be produced by
friction.
• Heat energy causes changes in
temperature and phase of any form of
matter.
Chemical Energy
• Chemical Energy is required to
bond atoms together.
• And when bonds are broken,
energy is released.
Cont. Chemical Energy
• Fuel
and
• food
are forms of
stored
chemical
energy.
Electromagnetic Energy
• Power lines carry electromagnetic energy
into your home in the form of electricity.
• Elect. field + mag. field
Electromagnetic Energy
Cont. Electromagnetic Energy
• Light is a form of
electromagnetic energy.
• Each color of light (RoyGBv)
represents a different amount
of electromagnetic energy.
• Electromagnetic Energy is
also carried by X-rays, radio
waves, and laser light.
Nuclear Energy
• The nucleus
of an atom is
the source of
nuclear
energy.
Cont. Nuclear Energy
• When the nucleus splits
(fission), nuclear energy
is released in the form of
heat energy and light
energy.
• Nuclear energy is also
released when nuclei
collide at high speeds
and join (fusion).
Cont. Nuclear Energy
The sun’s energy is produced
from a nuclear fusion reaction
in which hydrogen nuclei fuse
to form helium nuclei.
Cont. Nuclear Energy
• Nuclear energy is the most
concentrated form of energy.
Mechanical Energy
• When work is done on an object,
it acquires energy. It is known as
mechanical energy.
•Mechanical Energy =
= potential Energy + Kinetic Energy
Cont. Mechanical Energy
• potential energy: the energy held
by an object because of its position
relative to other objects.
Stored Energy
• kinetic energy of an object : the
energy that it due to its motion.
Energy of Motion
• potential energy
• kinetic energy
Cont. Mechanical Energy
Cont. Mechanical Energy
• When you kick
a football, you
give mechanical
energy to the
football to make
it move.
Cont. Mechanical Energy
When you throw a
balling ball, you
give it energy.
When that bowling
ball hits the pins,
some of the energy
is transferred to
the pins (transfer
of momentum).
