This document provides an overview of various types of green energy, including hydro, solar, wind, biofuel, tidal, wave, hydrogen, and geo-thermal energy. It explains that green energy comes from natural, renewable sources and has a negligible impact on greenhouse gas emissions, unlike fossil fuels which are limited and produce harmful gases. Each type of green energy is then described in 1-2 paragraphs, highlighting aspects like its worldwide usage, how it is produced or harnessed, advantages and limitations. The conclusion states that renewable energy technologies will become more important as concerns rise over fossil fuel availability and environmental impacts.

1. GREEN ENERGY
Presented by:
Sanaan Umar Khan
Sanaan Zia
Ibrahim
Ziaullah
Department of Industrial Engineering
University of Engineering and Technology Peshawar

2. 1.0 Contents
 Introduction
 Why Green Energy
 Types of Green Energy
 Hydro
 Solar
 Wind
 Biofuel
 Tidal
 Wave energy
 Hydrogen
 Geo-Thermal
 Conclusion.

3. 1.2 INTRODUCTION
 Energy that comes from nature
 Any type of energy that has negligible
impact on the greenhouse gas emission.
 Energy that is renewable.

4. 1.3 WHY GREEN ENERGY
 Fossil fuel is limited
 Fossil fuel creates great amount of greenhouse gases
 Except coal the other options are expensive
 Green energy is natural and renewable
 Its free because its natural
 It does not produce harmful gases.

5. 1.4 TYPES OF GREEN ENERGY
(HYDRO)
 The biggest source of renewable energy
used around the world
 Almost 21% of world energy is produced
by this (2000)
 Build on special sites
 Water storage needs lots of area so people
and environment can be affected.

6. CONTINUE ……
(SOLAR)
 232 GW produced through solar (2015)
 There are two ways energy is produced through solar
Thermal:
sunlight is concentrated at one place to make steam.
Photovoltaic:
special panels used that turns light
into electricity. Substance used are
gallium arsenide, crystalline silicon
and amorphous silicon

7. CONTINUE……
(WIND)
 Second most popular source of green power.
 17,500 MW worldwide (2000)
 Can be installed only in specific areas (windy areas)
 Are complicated to design ( aerodynamics)
 two types of wind turbine.
Vertical axis: spins on wind
From every direction.
Horizontal axis: spins on
Only one direction.

8. CONTINUE……
(BIO-FUEL)
 Plant matter, trees, grasses,
agricultural crops or other
biological materials.
 When the rots or decomposes
they release burnable gases.
 14,000 MW of annual
worldwide generation
capacity.
 The U.S. is the largest
biomass generator in the
world with 7,000 MW.

9. CONTINUE……
(TIDAL)
 Tides caused by moon in ocean are
used to drive underwater blades .
 Tides are more predictive than solar
and wind. Happens twice a day
 Huge potential because of the ocean
is waste.
 A tidal barrage power station in
France has 240 MW of capacity; its
typical output is 0.5 terawatt-hour
per year.

10. CONTINUE…
(WAVE)
 Tidal energy uses the
gravitational pull of the Earth and
moon to generate energy.
While Wave energy uses the
kinetic force of waves to
produce energy.
 Waves have lower displacement
than tides but are more
 Different converter would be
used

11. CONTINUE…..
HYDRODEN
 Available in very huge
amount.
 When burned only water
is released as end
product.
 Hydrogen can be used
in fuel cells to power
electric cars.
 A lot of energy is used
to create initial hydrogen
gas.

12. CONTINUE…..
(GEO-THERMAL)
 Heat at the core of the
earth exploited to
produce electricity
through steam.
 7,974 MW generated
worldwide (1999).
 Needs specific areas to
made like places with
natural hot springs.
(Chitral).

13. 1.5 CONCLUSION
 As the concerns about the
availability & environmental impacts
of fossil fuels become more wide
spread, the interest on
environmentally benign renewable
energy technologies will surely take
center stage among engineers &
policymakers

14. 1.6 REFRENCES
 Wikipedia
 Cosia.ca
 Bp.com global corporate energy
 Britannica.com