clean energies and their uses

1. Clean energies and their uses in
technology
By: Gael and Paola

2. Contents chart
• What is a clean
energy?
• Types of
• Solar energy
• Geothermal energy
• Wind power
• Biomass
• Fossil fuels
• Fossil fuels 2
• Benefits in the
environment
• Economy
• Advantages
• Other examples
• Importance
• Photos
• Photos 2
• More benefits
• Even more benefits

3.  Renewable energy is the
energy that is obtained
from virtually
inexhaustible natural
sources, either because
of the immense amount
of energy they contain,
or because they are
capable of being
regenerated by natural
means.
What is a clean energy?

4.  Solar Power
 Geothermal
 Wind energy
 Biomass
 Ocean energy (tidal
power)
 Hydropower
Types of clean energies

5.  Most people are familiar with solar applications.
These systems capture the sun’s energy and turn
it into energy that you can use to heat or cool
your home, heat water, or make electricity.
 Solar Photovoltaic (PV) Systems: use the sun’s
energy to generate electricity.
 Solar Thermal – Hot Water Systems: harvest the
sun’s heat to produce hot water—even in winter!
 Solar Thermal – Space Heating Systems: harvest
the sun’s heat and use it to keep you comfortably
warm inside your home or business. They can also
be used to produce hot water.
 Solar Thermal – Air-Conditioning Systems: use
the sun’s energy to heat water or antifreeze. This
captured heat is then used to power an
absorption chiller to provide air-conditioning
Solar energy

6.  Geothermal Systems use the constant
temperature of the ground just below
the Earth’s surface to heat and cool
homes and businesses, and produce hot
water. Geothermal systems are less well-
known than solar and wind, but they are
equally effective and are growing in
popularity. Geothermal systems use a
pump to transfer warmer ground
temperatures indoors during the colder
months, and cooler ground
temperatures indoors the warmer
months. In addition to heating and
cooling homes and businesses,
geothermal systems can also produce
hot water.
Geothermal energy

7.  Small Wind Systems are used to
harness the power of wind to
produce electricity. Wind energy
has been around for a really long
time (think Dutch windmills, for
example), but ironically, small
wind systems receive less “air
time” today than solar
applications. That’s unfortunate,
because in areas where there are
7-12 mph winds – places like
coastal locations, hilly areas and
open plains — small wind
systems are extremely efficient at
producing electricity.
Wind power

8.  Things from the earth can also be used to
generate energy. Biomass & Biofuel
Heating Systems use biomass materials
such as wood chips, logs, etc. or biofuels
(sourced from used cooking oils or
processed wood / farm waste, algae, etc.)
to provide space and water heating. These
systems can range from basic wood
burning stoves to more modern,
automated systems. There are
also Combined Heat & Power (microCHP)
Systems, which are highly efficient and use
natural gas or hydrogen to simultaneously
generate electricity and provide space
heating and hot water.
Biomass

9.  While impressive progress
has been made in
developing clean energy
technologies in recent
years, the success stories
are overshadowed by
surging demand for fossil
fuels, which are
outstripping deployment
of clean energy
technologies.
Fossil Fuels (non-renewable)

10.  Coal has met 47% of the
global new electricity
demand since the turn of
the century, eclipsing clean
energy efforts made over
the same period of time,
which include improved
implementation of energy
efficiency measures and
rapid growth in the use of
renewable energy sources.
Fossil fuels

11.  Renewable energy
technologies are clean
sources of energy that
have a much lower
environmental impact
than conventional
energy technologies.
Environmental benefits

12.  Most renewable energy
investments are spent on
materials and workmanship to
build and maintain the facilities,
rather than on costly energy
imports. Renewable energy
investments are usually spent
within the United States,
frequently in the same state, and
often in the same town. This
means your energy dollars stay
home to create jobs and fuel
local economies, rather than
going overseas.
Importance in economy

13.  Greater access – Nearly 600 million people in Africa live without access to electricity.
Sustainable energy such as solar energy provides an opportunity to decentralise energy
production and hasten greater access, by taking it off-grid. Subsidies towards on-grid sources
favour the wealthy and put the rural poor at a disadvantage, who often use a greater
percentage of their incomes on energy access.
 Lower barriers to entry – The International Energy Agency has recommended 53% of energy
investment should be on mini-grids and 17% on household level production. Both require
fewer subsidies than utility scale grid electricity. Furthermore, entry level solar products such
as solar lights act as gateways to mid range products e.g. solar home systems and larger solar
roofs.
 Climate change – Fossil fuels generate carbon dioxide emissions which creates climate
change, but renewable energy is carbon neutral. Black carbon, which is emitted when
kerosene is burned in small lamps across Africa, is known to be a very powerful absorber of
sunlight, and also contributes to global warming. One kilogram of black carbon produces as
much atmospheric warming in a month as 700 kilograms of carbon dioxide does over 100
years. It is estimated that 7-9% of kerosene lamp emissions are black carbon compared to
around 0.001% in a diesel engine. Solar lights offer zero emissions, making them a climate
friendly alternative.
Some examples of advantages of
renewable energy

14.  Pollution and safety – The smoke and particulates released by burning fossil
fuels, especially kerosene, along with a higher risk of fires, make them a general
health hazard.
 Health and economic advantages – Air and water pollution resulting from fossil
fuel use is associated with cancers and heart attacks, as well as brain and lung
damage. In contrast, renewable energy use has resulted in lower premature
deaths and less lost productivity related to illness, it’s also helped reduce health
care costs. Fossil fuel use has been estimated to cost the US economy between
$361.7 and $886.5 billion because of its effects on health .
 Job creation – Compared to fossil fuels, renewable energy production creates
more jobs as production requires more labour[11]. A 2009 study by the Union of
Concerned Scientists found that having 25% of total electricity output produced
by renewable energy would create 3 times as many jobs as an equivalent amount
of output from fossil fuels.
Other examples

15.  Electricity production is our source of greenhouse
gases, more than all of our driving and flying
combined, and clean energy also reduces harmful
smog, toxic buildups in our air and water, and the
impacts caused by coal mining and gas extraction. But
replacing our fossil-fuel infrastructure will take
timeand strong, consistent support from both state
and federal mandates to build renewable energy
generation and demand for clean energy from
consumers and businesses.
Why clean energy is important

16. photos

17. More photos

18. More benefits
 Reduced greenhouse
emitions
 Jobs
 Public health

19. Even more benefits
 Energy independence
 Save money

20. Thanks!