1. FLOATING SOLAR CHIMNEY
Presented by : Guide:
B.U.Ujval A.H.Suman

2. Introduction Solar chimney technology?
Electricity power generating method
Warm air of a large solar collector up drafting through tall chimney.
Floating Solar Chimney?
Solar chimney with successive balloon tubes.
Filled with a lighter than air gas.

3. Principle of operation
Greenhouse effect
Absorption of short wavelength of visible light by a transperant medium.
Longer wavelength of infrared re-rediation.
Leeds to heating and resultant higher temperature.

4. Components of a FSC
The Solar Collector- large open greenhouse with transparent roof
The Floating Solar Chimney (FSC)-
Tall fabric cylinder
warm air of greenhouse is up-drafting.
The Turbo-Generators -set of air turbines geared to electric generators

5. Working Air is warmed in solar collector.
Warm Air Rises in Solar Chimney.
Thermodynamic Energy-rotates Air Turbines.
Air turbines coupled to Generators.

6. Operation

7. Solar collector Circular greenhouse Double glazing transparent roof
Periphery -open to the ambient air.

8. Operation of a solar collector cell
Representation Of Single Solar Cell

9. Thermal storage effect
Water tubes/bags-on ground of Solar Collector.
Daily operation time increased.
Maximum power depends-thermal storage capacity of water.

10. Similarity with hydro electric plants
HEP
FSC
Falling water gravity
Water turbines
Energy proportional to falling water height
Up drafting warm air
Air turbines
Energy proportional to up drafting height of chimney
Floating solar chimney is Hydro electric power plant of deserts

11. Structure Of FSC

12. Operational curves of a FSC

13. Floating Chimney Diagram
Bubbled tubes
filled with 𝑁 𝐻 3
Placed outside
Or inside the cylinder.
molecular weight density in kg/ 𝑚 3
Air
Ammonia

14. Efficiency Vs Height and Diameter

15. Air turbines Normal axis placed inside the FSC
Conversion of dynamic energy of warm air to rotational energy
Output depends on product of mass flow and pressure drop on the turbine

16. Generators Synchronous generators have a large number of pole pairs.
Generated frequency is equal to grid frequency.
Gear box used to limit the generated frequency proportional to grid frequency.

17. Favourable places of installation
High solar irradiation - >1600KWh,best>2000KWh
Low average annual winds-<3m/sec
Limited strong winds-<20m/sec
No heavy snow,hail storms,dust storms

18. Effeciency and parameters
Carnot's theorem reveals the absolute limit of efficiency
Annual efficiency =Pth/Gav*Ac
Pth=P+PL+Pkin+Pfr
Max efficiency=gH/Cp*T
Annual average efficiency
double glazing=1.2H/1000%
single glazing=.79H/1000%
For g=9.81,cp=1005 and T≈293.20K(200C) Contd..

19. Efficiency (contd) G=2000 KWh/ 𝑚 2 ,A=10^6 𝑚 2 (one squareKm)
H=750,power output
Double glazing-18KWh
Single glazing-12Kwh

20. Advantages They can replace conventional fuel consuming Power Plants.
Low investment risk
environmental friendly reliable, cost competitive
sustainable development and global warming elimination
Feed in tariffs grants and tax benefits
The primary materials of the SAEPs are low cost or recyclable
The SAEPs have long operating life

21. THANK YOU