1.
•The Greek ERASMUS+ team
presents…

2.
EDITORS: PARIS
BAGKAS – FILIPPOS
MAKRIDIS

3.
•…Energy in our lives,
particularly energy in our
country.

4.
THE LAW OF CONSERVATION
OF ENERGY
• “the ability to do work”
• The combination of energy and matter make up the
universe:
-Matter is substance, and energy is the mover of
substance.
WHAT IS ENERGY?
-Energy cannot be created or destroyed; it may be
transformed from one form into another, but the total
amount of energy never changes.

5.
WHAT ENERGY SOURCES DO YOU
HAVE IN YOUR COUNTRY?
Energy
sources
Renewabl
e
Wind
Solar
energy
Geotherma
l
Hydropower
Non-
Renewabl
e
Fossil
fuels
Lignite

6.
RENEWABLE
ENERGY SOURCES IN GREECE

7.
WIND POWER
• Wind power was due to
expand by 352% by 2010
to meet the European
target of 20% coverage
of energy needs from
renewable sources.
Previously, there were
1,028 wind turbines
installed throughout
Greece and the number
was set to reach 2,587
wind turbines before the
end of 2010.
View of a wind
farm, Panachaiko
mountain.

8.
SOLAR ENERGY
• Solar energy is an important source
of renewable energy and its technologies
are broadly characterized as
either passive solar (house construction in
Ancient Greece and Rome) or active solar
depending on the way they capture and
distribute solar energy or convert it
into solar power.

9.
• The cheapest solar power in 2013 was
photovoltaics (PV), that is a variable renewable
energy source. There is a second type of solar
power, though, named concentrated solar
power (CSP), which can efficiently provide 24-
hour storage, making CSP dispatchable,
and load following.
• Development of solar power in Greece started
in 2006 and installations of photovoltaic
systems increased since 2009.

10.
• By April 2015, the total installed photovoltaic
capacity in Greece had reached
2,442.6 MWp from which 350.5 MWp were
installed on rooftops and the rest were ground
mounted. A big fraction of these installations,
namely 987.2 MWp were installed in the period
between January–September 2013 despite the
financial crisis.
• Greece ranks 5th worldwide with regard to per
capita installed PV capacity. It is expected that
PV produced energy will cover up to 7% of the
country's electricity demand in 2014.

11.
Greece's largest photovoltaic (PV) power plants
Power Location Description Constructed
7+7 MW Naoussa Photovoltaic plants cluster 2013
4.3 MW Florina Florina industrial zone 2009
2 MW Volos Photovoltaic power plant Volos 2009
2 MW Thebes
Photovoltaic power plant
Thebes
2009
1.997 MW Koutsopodi 2009
1.99 MW Tripoli 2009
1.25 MW Pournari 2009
1 MW Iliopenditiki 2009
944 kW Pontoiraklia 2009
100 kW Kythnos 2009
60 kW Sifnos 1998
20 kW Tavros, ILPAP Building 2009
20 kW Ethel Station 2009
20 kW Maroussi, Eirini station 2009

12.
Greece's largest photovoltaic (PV) power plants
Power Location Description Constructed
200–300 MW Kozani Park of Kozani –
50 MW Megalopoli Park of Megalopoli –
0.48 MW Crete Park of
Atherinolakos –

13.
HYDROPOWER ENERGY
• Hydropower or water power (from
the Greek: ύδωρ, "water" ) is power derived
from the energy of falling water or fast running
water, which may be harnessed for useful
purposes. Since ancient times, hydropower
from many kinds of watermills has been used
as a renewable energy source for irrigation and
the operation of various mechanical devices,
such as gristmills, sawmills,
textile mills, triphammers, dock cranes,
domestic lifts, and ore mills.
• 12% of Greece's electricity comes from
Hydroelectric power plants

14.
GEOTHERMAL ENERGY
• Geothermal is thermal energy generated and
stored in the Earth. Thermal energy is the
energy that determines the temperature of
matter. The geothermal energy of the
Earth's crust originates from the original
formation of the planet and from radioactive
decay of materials. Greece has got so many
areas with geothermal energy. The most
important are situated in the islands of Milos
and Nisyros which are in the Aegean sea.
• Unlikely only 1% of the whole geothermal
potential of the country has been used so far.

15.
NON-RENEWABLE ENERGY
SOURCES IN GREECE

16.
FOSSIL FUELS
Oil and gas
• Greece has 10 million barrels of proved oil
reserves as of 1 January 2011. Hellenic
Petroleum is the country's largest oil company,
followed by Motor Oil Hellas. Greece's oil
production stands at 7,946 barrels per day
(bbl/d), ranked 90th, while it exports 181,600 bbl/d
(57th) and imports 496,600 bbl/d (25th).

17.
• In 2011 the Greek government approved the start
of oil exploration and drilling in three locations
within Greece, with an estimated output of 250 to
300 million barrels over the next 15 to 20
years. The estimated output in Euros of the three
deposits is €25 billion over a 15-year period, of
which €13–€14 billion will enter state coffers.

18.
• In addition to the above, Greece is also to
start oil and gas exploration in other locations
in the Ionian Sea as well as the Libyan Sea,
within the Greek exclusive economic zone,
south of Crete. The Ministry of the
Environment, Energy and Climate
Change announced that there was interest
from various countries (including Norway and
the United States) in exploration,

19.
COAL
• Megalopoli Mine is a
large lignite and coal mine owned by
the Public Power Corporation of Greece. The
largest lignite and coal mine in Greece are in
the area of Western Macedonia and
especially in Ptolemaida.

20.
MINES OF LIGNITE

21.
TO SUM UP…

22.
WHAT ENERGY SOURCES DO WE
HAVE IN OUR COUNTRY?
• Energy production in Greece is dominated by the state
owned by the Public Power Corporation (known mostly by
its acronym ΔΕΗ, or in English DEI). In 2009 DEI supplied
for 85.6% of all electric energy demand in Greece, while
the number fell to 77.3% in 2010.
• Almost half (48%) of DEI's power output is generated
using lignite, a drop from the 51.6% in 2009.
• 12% of Greece's electricity comes from Hydroelectric
power plants and another 20% from natural gas.
Between 2009 and 2010, independent companies' energy
production increased by 56%, from 2.809 Gigawatt hour
in 2009 to 4.232 GWh in 2010

23.
ELECTRICITY FACTORIES IN GREECE

24.
HOW IS THE DISTRIBUTION OF RENEWABLE
ENERGY AND NON-RENEWABLE ENERGY IN
GREECE?
• The Greek energy sector is still largely dependent on fossil
fuels, most of which are imported. Domestic energy
sources include lignite which accounts for around 50% of
electricity generation as well as renewable energy sources
(RES) such as hydro-power, wind, solar energy and
biomass.( RES currently account for 13.8 % of gross final
energy consumption and a national target of a 20% share
by 2020 has been set.)
• A number of important reforms aiming at a further
liberalization of the energy market, its integration with
neighboring countries and the privatization of public
companies are currently being implemented. There are also
plans for large infrastructure projects in the electricity, gas
and petroleum sector that are supposed to strengthen

25.
•PILLARS

26.
• In 2008 renewable energy accounted for 8% of the country's
total energy consumption, a rise from the 7.2% it accounted
for in 2006, but still below the EU average of 10% in
2008. 10% of the country's renewable energy comes
from solar power, while most comes from biomass and
waste recycling.
• In line with the European Commission's Directive on
Renewable Energy, Greece aims to get 18% of its energy
from renewable sources by 2020.
• In 2013, according to the independent power
transmission operator in Greece more than 20% of the
electricity in Greece has been produced from renewable
energy sources and hydroelectric powerplants.
• Greece currently does not have any nuclear power
plants in operation, however in 2009 the Academy of
Athens suggested that research in the possibility of Greek
nuclear power plants begin.

27.
THE DISTRIBUTION OF RENEWABLE AND
NON-RENEWABLE ENERGY WORDWIDE
➢Investment of renewable energy in region, 2015

28.
HOW MUCH IS THE COST FOR
1KWH HOUR ON AVERAGE?
• The price of kWh depends on the overall
consumed energy in 4 months (120 days).
On average, the cost for 1 kWh is 0.085
EUR/kwh.
• Examples: -even that we consumed in
120 days 800kwh then the energy costs:
800 × 0,05625 = 45euro
-all be it that we
consumed in 120 days 1000kwh then the
energy costs:
1000 × 0,07850 =
78,5euro

29.
HOW MUCH IS CONSUMED ON A
“GLOW LAMP” ( HALOGEN LAMP –
REFLECTOR – LED LIGHTNING AND
CFL S /40WATT ) PER HOUR /12
HOURS/24 HOURS AND WHAT
DOES IT COST?

30.
P el=Ε el/t
Per hour:
• E el=P el x t
E el=40 w x 1 h
E el=40 wh=40/1000 kwh=0,04 kwh
• E el=P el x t
E el=40 w x 12 h
E el=480 wh=480/1000 kwh=0,48 kwh
• E el= P el t
E el=40 w x 24 h
E el=960 wh=960/1000 kwh=0,96 kwh
Cost:
• 1 kwh costs 0,085 euro
0,04 kwh costs x?
x=0,04 x 0,085=0,0034 euro
• 0,0034 x 12=0,048 euro
• 0,0034 x 24=0,0816 euro

31.
HOW MUCH IS CONSUMED WITH
A LAPTOP USED PER HOUR /12
HOURS/24 HOURS AND WHAT
DOES IT COST?

32.
P el=Ε el/t
Per hour:
• E el=P el x t
E el=60 w x 1 h
E el=60 wh=60/1000 kwh=0,06 kwh
• E el=P el x t
E el=60 w x 12 h
E el=720 wh=720/1000 kwh=0,72 kwh
• E el= P el x t
E el=60 w x 24 h
E el=1440 wh=1440/1000 kwh=1,44 kwh
Cost:
• 1 kwh costs 0,085 euro
0,06 kwh costs x?
x=0,06 x 0,085=0,0051 euro
• 0,0051 x 12=0,0612 euro
• 0,0051 x 24=1,224 euro

33.
WHAT DOES IT COST TO HEAT A
HOUSE ABOUT 100 SQUARE
METERS LARGE ON AVERAGE –
COMPARED WITH DIFFERENT
ENERGY SOURCES? USE AT LEAST
THREE POWER COMPANIES (IF
YOU HAVE).

34.
11000 kwh/ per year for a house which is 100 square meters
• Electricity: ΔΕΗ (DEI), the average price is 0,12 euro/kwh:
0,12 x 11000=1320 euro/ per year
• Natural gas: EPA of Thessaly, the average price is 0,05
euro/kwh:
0,05 x 11000=550 euro/per year
• Petroleum: Heating company which is called SHELL, the
average price is 0,11 euro/kwh
0,11 X 11.000= 1.210 euro/per year

35.
WHAT DOES IT COST TO HEAT AN
APARTMENT ABOUT 70 SQUARE
METERS LARGE ON AVERAGE -
COMPARED WITH DIFFERENT
ENERGY SOURCES ?( USE AT
LEAST THREE POWER COMPANIES
(IF YOU HAVE)

36.
11000 kwh/ per year for a house which is 100 square meters
x? for a house which is 70 square meters
11000 x 70=100x
100x=770000
x=770000/100
x=7700
7700 kwh/ per year for a house which is 70 square meters
• Electricity: ΔΕΗ (DEI), the average price is 0,12 euro/kwh:
0,12 x 7700=924 euro/ per year
• Natural gas: EPA of Thessaly, the average price is 0,05 euro/kwh:
0,05 x 7700=385 euro/per year
• Petroleum: Heating company which is called SHELL, the average
price is 0,11 euro/ kwh:
0,11 x 7700=847 euro/ per year

37.
PELLETS

38.
WHAT CAN YOU DO TO REDUCE
THE COSTS? GIVE AT LEAST
THREE PROPOSITIONS.

39.
•WAYS TO REDUCE THE HEATING’S COSTS.
• Proper heating space
• Proper ventilation of the room
• Knowledge of the energy efficiency of the house
• Frequent control of the heating system
• Install low-power circulators
• Replacement frames and glass
• External Thermal Insulation

40.
HOW TO LOWER ELECTRIC BILL, ACTION #1 —
GO SOLAR!
• I’m going to go ahead and start with the most
obvious — the most effective way to lower your
electric bill is very likely by going solar. Sure, you
have to pay for those solar panels, but they are
cheaper (in the long run) than electricity. The
average household that goes solar is likely to save
tens of thousands of dollars over the course of
their solar panel system’s lifetime.

41.
HOW TO LOWER ELECTRIC BILL, ACTION
#2 — SWITCH TO LEDS!
• Now, beyond the big boy, probably the next best step you
can take is ditching your incandescent light bulbs for LEDs.
Yes, previously, CFLs were the hot green option for lighting.
However, the cost of even more-efficient LEDs has come
down tremendously in recent years, and a couple of $5 or
$10 LED options are probably your best options for low-
cost, high-efficiency, green lighting.
• Another positive of LEDs is that they don’t contain any
mercury. Now that the cost of LEDs has come down so far, I
think they will quickly grow in use and replace both
incandescent and CFL bulbs. Join the LED revolution!

42.
HOW TO LOWER ELECTRIC BILL, ACTION #3 —
CUT YOUR AC/HEATING NEEDS
• Air conditioning and heating are major electricity
hogs for a large number of people. However, a big
reason for that is simply because we’ve gotten lazy
about adjusting to our environment, or even gone
in the opposite direction.
• Our bodies are made to adjust to our surrounding
environment. Let your body do its job

43.
WHAT CHOICES OF ENERGY
SOURCES / SUPPLIERS HAVE THE
LEAST ENVIRONMENTAL IMPACT?

44.
A POEM ABOUT ENERGY

45.
• Just respect this planet,
• If you want a better climate
• Just be better people
• And everything will be so simple!
• Take care of your rubbish
• ‘cause bad treatment is banished…
• Renewable energy from the sea,
• Will be useful for you and me!
• Solar energy in use
• To avoid nature abuse.

46.
• Don’t waste so much coal,
• Don’t make bigger the Ozone layer hole.
• Let the nature be more clean
• And we’ll have a better future scene!
• Make our future generation
• Learn more about planet and education.
• All the problem is pollution,
• So let’s start a Green Revolution!!!
– The Greek ERASMUS+ team

47.
A LITTLE POEM ABOUT ENERGY IN THIS WORLD
BY JERRY ABRAHAMSON
• Renewable Energy is
The wave of the future
And, if we don't start developing it
We won't be able to survive
For we have gotten soft
To our easy life
And, we won't know how to survive
If we don't start changing
Renewable energy is here to stay
And we have to start replacing
Our energy supply
With this everlasting resourse

48.
How Much Does it
Cost to Drive?
Who can solve this problem?

49.
How much does it cost in fuels your
family car per year?
• calculate average cost of fuel per Km/year(average
15000km) if you use as energy sources : Premium
Unleaded Petrol, Diesel or LPG (Liquefied Petroleum
Gas)
• calculate average cost of fuel per Km/year(average
15000km) if you use as energy sources : Premium
Unleaded Petrol, Diesel or LPG (Liquefied Petroleum
Gas)

50.
Answer
Unleaded Petrol
95
Lt
LPG
Lt
Diesel
Lt
Fuel consumption
Lt/100km
5,4 6,6 4,5
Price/Lt in € 1,375 0,667 1,075
Km/year 15000 15000 15000
Fuel cost/year ? ? ?

51.
And the winner is….
• Unleaded Petrol 95
5,4lt/100Kmx1,375€/lt =7,425 €/100Km
7,425 €/100Kmx15000Km=1113,75 €
• LPG
6,6lt/100Kmx0,667€/lt = 4,4022
€/100Km
4,4022 €/100Kmx15000Km=660,33 €
• Diesel
4,5lt/100Kmx1,075€/lt = 4,8375
€/100Km
4,8375 €/100Kmx15000Km=725,63 €
LPG

52.
A MATH PROBLEM
In isosceles triangle ΑΒΓ(ΑΒ =
ΑΓ), height ΑΔ = 4 cm and the
side ΒΓ = 4 cm.
a) Calculate the ΑΓ side and then
prove that the perimeter of the
triangle ΑΒΓ is 4 + 4√ 5 cm
b) In the previous question 4
students gave the following
answers:
Which of these is correct?

53.
THE SOLUTION...
a) The height ΑΔ in the isosceles triangle ΑΒΓ is the
median of the triangle as well.
So: ΒΔ=ΔΓ=2cm.
According to the Pythagorean Theorem in the
rectangular triangle ΑΔΓ we have:

54.
The perimeter is equal to:
b)
equals to:
Therefore, the correct answers are: