This document presents information on solar updraft towers as a renewable energy technology. It discusses the components of a solar updraft tower, including the collector, chimney, and turbine. The collector covers a large area to heat air using the greenhouse effect. The heated air rises through the chimney due to buoyancy, powering a turbine. While construction costs are high, solar updraft towers provide renewable energy from sunlight with minimal operations and maintenance needs and no greenhouse gas emissions. They are well-suited for developing countries with ample land and sunshine.

1. Implementation of renewable
energy resources in India
Presented by,
Neha Chouhan
IVth sem

2. 1) Energy crises
2) Renewable energy
3) Solar energy
4) Solar updraft tower
5) Parts of solar updraft tower
6) Working of solar updraft tower
7) Role of collector
8) Role of chimney
9) Role of turbine
10) Output dependence
Content

3. 11) Governing equation
12) Cost evaluation
13) Advantages
14) Disadvantages
15) Conclusion
Continued…………

4. Currently earths most of the renewable energy is depleted by human
needs.
Some of the renewable energy resources are
Natural gas
Petroleum
Coal
Nuclear energy
Energy Crises

5. Renewable energy is generally defined as energy that
comes from resources which are naturally replenished on
a human timescale.
Wind energy
Hydro energy
Tidal energy
Solar energy
Renewable Energy

6. Solar energy refers to the conversion of the sun’s rays
into useful forms of energy.
Implemented in these way:
Solar cells
Solar heaters
Parabolic dishes
SOLAR TOWER
Solar energy

7. The solar updraft tower is
renewable type power
plant.
Solar updraft towers are
like an inverted funnel,
with a wide skirt to collect
air to then turn a turbine
in the tower
Solar updraft tower

8. Collector
Chimney or tower
Turbine
Parts of solar updraft tower

9. Collector is the part, which is used to produce hot air by
green-house effect.
It is usually 5-6 meters high and covers a very large area
about thousands of m²
The larger the area, the more energy generated from the
chimney.
Covering materials may be different, such as; glass,
plastic film or glazed collector.
The most efficient one is glazed collector. It can convert up
to 70% of irradiated solar energy into heat.
Collector

10. The efficiency is proportional to the height of the
chimney.
There are two types of different chimneys using for the
plant:
 Free standing chimney
 guyed chimney.
The chimney should be designed to minimize the
frictional losses
And to maximize the pressure difference in the tower.
Chimney or tower

12. Turbines are used to convert kinetic energy of air into the
mechanical energy.
Turbines are placed horizontally in chimney, vertically in
the collector.
In order to obtain maximum energy from the warmed air,
turbines blades should cover all the cross-sectional area of
the chimney. To do this, one big turbine or a few small
turbines should be used in chimney
Turbine

13. Two basic principle behind solar updraft tower are
:Green house effect and buoyancy driven flow
Incident solar radiation heats the air under the
collector .
The temperature difference causes a pressure drop
over the height of chimney resulting in an upwind
which is converted into mechanical energy by the
turbines and then into electricity via conventional
generators.
How does a solar updraft tower
works?

15. The solar tower uses a greenhouse-like collector to
heat the air that drives the power plant.
The collector surface gradually rises closer to the
tower, to direct the heated air towards the tower, then
curves up sharply at the base of the tower in order to
transition the air flow up the tower
Collector is about 2 to 6 m stretched above the
ground.
The height of the roof increases adjacent to the
chimney base.
Role of collector

16. The chimney (or tower) of a solar updraft tower is
the thermal engine of the plant.
The heated air from the collector is funneled into the
chimney, where the buoyancy difference between the
heated air and the surrounding atmosphere creates a
pressure difference that drives the air up the
chimney.
Role of chimney

17. Turbines are placed near the bottom of the
tower.
For ease of access for maintenance and easy
connection to the generating equipment.
A single turbine can be mounted on vertical
axes inside the chimney.
Role of turbine

18. Water filled black tubes are laid down side by side
on the black sheeted or sprayed soil under the glass
roof collector.
They are filled with water once and remain closed
thereafter, so that no evaporation can take place.
The water inside the tubes stores a part of the solar
heat and releases it during the night, when the air
in the collector cools down.
Energy storage

20. The power output of the tower is directly related to the input
power and the efficiencies of each component. That is,
Where,
Qsolar =power input from solar radiation
η= efficiency of each component
The product of the efficiencies determines the overall
efficiency of the plant
Governing Equations

21. The main cost of a solar updraft tower is
in its construction. Operation and
maintenance are minimal.
Cost evaluation

22. It can be operated in day as well as night .
It is releases any greenhouse gases .
Low maintenance
Cultivation of crops
Needs no cooling water
Advantages

23. High construction cost
Requires a large amount of initial capital
Efficiency & Production Cost
Cost/kWh is higher than traditional forms of natural
gas energy production
Requires large amount of land
Not suitable for areas with high cost/acre
Disadvantages

24.  Current energy production from coal and oil is damaging
our environment and non renewable energy sources .
SOLAR ENERGY IS THE ANSWER
Technology for the use of solar energy must be:
-Be simple and reliable
-Be accessible to the technologically less
developed countries that are sunny and often have limited
raw materials resources.
Conclusion

25. SOLAR UPDRAFT
TOWER MEETS
THESE CONDITION!!!!

26. KEEP CALM
N
GO SOLAR