Renewable Energy Sources are becoming the great source of energy for each and every sector. It's number of advantages has made it, a great alternative over conventional energy sources. Therefore, the great demand of renewable energy sources signifies it's importance and necessity.

1. EMERGING TRENDS IN
RENEWABLE ENERGY SOURCES

2. CONTENTS:
• Introduction
• Renewable energy sources and new trends
• Solar energy and recent technologies
• Wind energy and recent technologies
• Hydropower
• Recent scenario
• Conclusion

3. Introduction:
1. Renewable energy sources is a continuously evolving
sector so there are a number of changes in it.
2. According to recent estimates, renewable energy serves
15 to 20 % of world’s energy demand. The potential of
renewable energy sources is enormous as they can in
principle meet many times the world’s energy demand,
hence to fulfill this large demand, a number of
technologies are being found to produce maximum
output.

4. Renewable energy sources and new
trends:

5. Solar energy and
recent technologies:
1. The oldest, cleanest and cheapest source of renewable
energy used today is the ‘SOLAR ENERGY’.
2. As per the figures, 35MW of power is generated from
1sq.km. area. With such solar is growing day-by-day.
3. For the start-up of this technology, high initial cost is the
limitation and hence the research is going on to find the
technologies with less capital and more productivity. Some
of the recent technologies are as follows:
 Solar roadways
 Floating solar
 Spaced based solar
 Solar powered trains

6. Solar Roadways:
fig. solar smart road
 In this technology, highways and roads are lined up
by solar panels that would deploy large amount of
electricity to the grid.
 This innovation is begun in early 2009.
 It helps to replace all current petroleum based
asphalt roads, parking lots and driveways with
solar road panels that collect energy to be used by
our homes and businesses.

7. Floating solar:
 Floating solar refers to an array of solar panels which floats
on water bodies like ponds, lakes, etc.
As Earth’s 70% surface area is covered by water it can be
used for a large scale production of electricity.
 Advantages of Floating solar:
1) No land occupancy
2) Installation is reversible
3) Easy tracking
4) Water saving from evaporation

8. • Japan’s world’s largest floating solar plant is
building(13.7MW)
• India’s largest floating solar plant( on Banasuya sagar
reservoir in Wayaland in Kerala – 500KWp)

9. Spaced based solar:
Space-based satellites capture sunlight and convert it into
microwave energy that is then beamed back to earth.
This type of technology promises to capture significant amount
of sunlight(nearly 90%) since satellites can be positioned to
optimize light capture round the clock.
It has been in research since the early 1970s.
SBSP designs generally include the use of some manner of
wireless power transmission.

10. • The advantage of placing solar cells in space is the 24 hour
availability of sunlight. Also the urgency of finding an
alternative energy source due to the depleting energy resources
on earth calls for Space Based Solar Power.
• The effectiveness of this system is that it is an environment
friendly, low-loss and large-scale method
of energy transfer.
spaced-based solar plant

11. Solar powered trains:
• Solar powered trains has solar panels on its rooftop.
• The train originally had two diesel engines, of which one
has been replaced by batteries and an electric motor. The
other will serve as a backup in case of emergency,
although the train will keep going under a cloudy sky, too.
• The fully solar-powered train holds 100 seated
passengers, with room for others to stand, and completes
one round-trip journey every hour.
for example,
Delhi train with solar power

12. Wind energy:
• Wind energy has been one of humanity’s primary energy
sources for transporting goods, milling grain, and pumping
water for several millennia. Wind power has become a
legitimate source of energy over the past few decades.
• Some of the technologies are as follows:
1) Floating wind turbine
2) Bladeless wind turbine
3) Installation of wind turbines along the railway tracks

13. Floating Wind Turbine:
• Tethered to the sea floor, floating foundations allow wind
turbines to operate in areas where water depths may be greater
than 165 feet.
• This technology largely adopted from the oil and gas industry, is
already successful at the prototype stage, with more extensive
test and demonstration projects underway. Currently, the most
cost-effective installation method appears to be a “tow-out”
concept, in which the foundation and turbine are constructed in
port and then towed out to an anchor site.

14. Bladeless wind turbine:
• Bladeless turbines will generate electricity for
40 percent lesser in cost compared with
conventional wind turbines.
• Advantages:
1) More efficient
2) Less noise
3) Low maintenance
4) No moving parts- no harm to birds
These turbines are in demand because of low
cost and low drop of power.

15. Installation of wind turbine along the
railway tracks:
• Basically, air moves from high pressure to low pressure. So
air is moving towards the train, in order to equalize the
pressure drop.
• The vertical wind turbine is introduced near the train in
order to harness the wind energy. Due to the pressure drop
near the train, the turbulent air moves towards the train. As
we are placing the vertical axis wind turbine near the train,
the wind passes over the turbine blades and rotates it.

16. Hydropower:
 Hydropower is generated from the force of
moving water, since water is more denser than air,
more electricity is produced by water.
 The largest hydropower plant in the world is
Three Gorges Dam in China.
 30% of total power in the world is provided by
hydropower.
fig. Three Gorges Dam (22500MW)

17. Conclusion:
Here, it can be concluded that renewable energy
sources and its developments are the need of the bright
future. So we need to utilize such recent renewable
technologies more and more to enjoy a peaceful and
satisfactory life in today’s energy hungry world.

18. References:
• [Renewable: The world- changing power of Alternative
energy], Jeremy Shere,
• [Renewable energy resources], John Twidell, Tony Weir,
Routledge publisher, edition no. 2
• [Solar energy engineering]- Prof. Henrik Lund
• [Advanced renewable energy sources], Gopal Nath
Tiwari, Rajeev Kumar Mishra – 2015 edition
• [solar energy IEEE research paper 2016[]
www.engpaper.com/solar energy 2016
• http://www.sciencedirect.com
• http://www.sciencehowstuffs.com
• http://www.energygov.com
• http://www.treehugger.com
• http://www.spectrumieee.com
• http://www.ieeeexplore.com

19. THANK YOU