Torrent Power Plant Torrent Power Plant Solar ChimneySolar Chimney

Prepared By:-Prepared By:-

Manvendrasinh V. JadejaManvendrasinh V. JadejaRoll No:-12ME150Roll No:-12ME150

Subject:-P.P.E.Subject:-P.P.E.Assignment No:-2Assignment No:-2

Contents:Contents:1. Introduction2. Torrent Power Plant Solar Chimney A Parts of the Solar Chimney

i. Collectorii. Turbinesiii. Chimney

B. Working Principles of Solar Chimney C. Technology

4. Specification Of Chimney5. Advantages6. Disadvantages7. Conclusion

1.Introduction:1.Introduction:In many parts of the world , there is a growing awareness that some alternative energy sources could have an important role to play in the production of electricity.

However , only the solar energy represents totally nonpolluting inexhaustible energy resource that can be utilized economically to supply Man’s energy needs for all time.

The solar chimney system consists of three parts; The collector , turbines and the chimney.

Fig. 1 Fig. 1 The Prototype Manzanares The Prototype Manzanares Solar ChimneySolar Chimney At Ahmadabad At Ahmadabad

There are lots of methods of using the solar energy , and the Solar Chimney is one of them, which can be seen below, in figure.

2.Parts of the Solar 2.Parts of the Solar ChimneyChimney

2.A.(I)The Collector

Collector is the part , which is used to absorb hot air. It is usually 5-6 meters high and covers a very large area about thousands of m² as seen in fıgure. Fig. 2 The Collector.

Collector

There is no limitation for the surface area. 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 irratiated solar energy into heat a typical annual average is 50%. Also, with proper maintenance, its life span can easily be 60 years or more.

2.A.(II)Turbines

Turbines, seen in figure, are used to convert air to the mechanical energy.

Fig. 3 Turbine for Solar Chimney Power Station .

Fig. 4 Turbine with large diameter. Fig. 5 Small turbines.

Turbines are placed horizontally in chimney. 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, as can be seen from the figure 5. and figure 6.

2.A.(III) The chimney

The most important part of the plant is the chimney,seen in fıgure 7. It acts as a thermal engine.

Chimney

Fig. 6 The chimney.

Longer the chimneys height, the more the energy produced from the chimney.

The efficiency of the chimney does not depend on the amount of the temperature rising, but depends on the outside temperature.

Thus, efficiency is directly proportional to the ratio between the height of the chimney and the outside temperature.

Fig. 7 Fig. 7 Free-standing.Free-standing. Fig.Fig. 8 8 Guyed Tubes. Guyed Tubes.

2.B. Working principles of 2.B. Working principles of Solar Chimney Solar Chimney

• Solar chimney consists of large area of transparent covers which receive solar radiations• The cold air flows from the bottom of the chimney due to natural draught produced due to density difference of high density surrounding cold air & low density hot air below the transparent covers heated by the solar energy.•It is called chimney draught.

Fig. 9 Transparent roof .

•The flow rate of air depends on the draught produced due to density difference of cold and hot air and the height of the chimney.

•Inside the chimney, turbines with electric generator, produce electricity.

Fig. 10 Schematic seen of the solar chimney

2.C. Technology2.C. Technology•Solar chimneys are large-scale power plants with an output of 5 to 200 MW each.•A 100 MW plant will produce about 750 GHz/year.•For that the glass roof has to be several kilometers in diameter and the tube has to be as high as possible to achieve a large annual output.

Fig.Fig. 11 Basic Construction 11 Basic Construction

Fig.Fig. 12 12 Chimney Material Chimney Material

4.Specification Details of the 4.Specification Details of the solar chimney are as followssolar chimney are as followsLocation:-Torrent Ahmadabad

Type:-Solar tower power plant with steel-reinforced concrete tower and steel/glass solar air collector.

Features:- The base of the power will be between 170 to 200

meters.The chimney is basically a very simple tube with

wall thickness of 25cm, Diameter of chimney 125m and height of chimney is 800m.

The Collector roof will be 4000m in diameter

Company:- Private Limited

Construction Time:-20-28 Months

5.Advantages5.AdvantagesSolar chimney power stations are particularly suitable for generating electricity in deserts and sun-rich wasteland.

It provides electricity 24 hour a day from solar energy alone.No fuel is needed. It needs no cooling water and is suitable in extreme drying regions. It is particularly reliable and a little trouble-prone compared with other power plants.The materials concrete, glass and steel necessary for the building of solar chimney power stations are everywhere in sufficient quantities.

No ecological harm and no consumption of resources.

6.Disadvantages6.Disadvantages

Some estimates say that the cost of generating electricity from a solar chimney is 5x more than from a gas turbine. Although fuel is not required, solar chimneys have a very high capital cost.

The structure itself is massive and requires a lot of engineering expertise and materials to construct.

7.Conclusion7.Conclusion

Solar chimney power stations could make important contributions to the energy supplies in Africa, Asia and Australia, because there is plenty of space and sunlight available there.

It is very important for the future, because our resources are limited, except our sun.