1

Solar Tower

AN ALTERNATE WAY TO ENHANCE ENERGY

Aziz CompaniwalaPresented by

2

Contents

What is Solar Tower Classifications

Steam Based Molten Salt Based

Heliostat

Advantages of use of Solar Energy

Newly setup solar towers

Application

Scope in India

3

Solar Tower is method to convert solar energy

into electrical energy

Solar towers generate electric power from sunlight by focusing concentrated solar radiation on a tower-mounted heat exchanger (receiver).

4

Solar Tower can basically classified as:-

1)Steam Based Solar Tower

Water is used as medium which is converted to steam to generate electric power

2)Molten Salt Based Solar Tower

Here melted solution of potassium nitrate and sodium nitrate is used instead of water as a medium

5

1)Steam Based Solar Tower

Working Procedure:-

In solar tower, water is pumped to the receiver at topmost part of Solar tower.

Now solar radiation would be concentrated on receiver via Heliostat

Thus steam is generated due to rise in temperature inside the receiver tank which is further used in steam turbine generator

6

Thus Electric Power is generated from Solar Energy

Working Procedure:-

7

Heliostat

Heliostat is a Greek word:- Helios- sun stat - stationary

A Heliostat is a device that tracks the movement of the sun.

A heliostat is a device made of a plane metallic mirror, which turns on as to keep reflecting sunlight towards a predetermined target.

8

Limitation of this method is there is no alternative to produce electricity in absence of sunlight.

9

2)Molten Salt Based Solar Tower

This molten salt mixture (60 % sodium nitrate and 40% potassium nitrate) is used due to its properties of absorbing and accumulating heat energy for long time.

This plant is known as Gama Solar Tower.

This type of solar tower will work for approximate 4-5 hours in absence of sunlight.

Here melted solution of potassium nitrate and sodium nitrate instead of water as a medium

10

Solar energy is renewable, and also accessible in any part of the world.

solar energy is non-pollutant, zero noise pollution – since there are no moving parts in any of the devices which are used to capture the sunlight.

Maintenance costs are low as well – only occasional cleaning and periodic battery replacements are needed.

long-life operation guaranteeing.

Advantages of use of Solar Energy

11

In order to supply Electricity for street lights, & wherever the grid electricity is unreliable or unavailable, solar power tower technologies are used.

Solar Power can be used as Alternative for Wind & Hydro power.

These plants are best suited for utility-scale applications in the 30 to 400 MW range.

Provides rough enough Electricity for night use & during Cloudy weather.

Applications

12

PS20 solar power tower:- 44 (GWh) Yearly Production in Spain. Established in 2009.

Gemasolar:- 100 (GWh) Yearly Production in Spain. Established in 2011.

PS10 solar power tower:- 24 (GWh) Yearly Production in Spain. Established in 2006

Newly setup solar towers Ivanpah Solar Power Facility:- 1,080 (GWh) Yearly

Production in United States.Estimated to be completed till 2013.

Crescent Dunes Solar Energy:- 500 (GWh) Yearly Production in United States. Estimated to be completed till 2013

PS10 solar power tower in spain

13

Solar Project - AustraliaBasic Prnciple:- Hot Air Rises

14

Establishment of solar tower in India

As this three basic need (Land, source, and solar energy) are provided in India this can a great source of energy in future.

As Tropic of cancer line passes through India which give indication that India can have great source of solar energy.

As Tropic of Cancer line passes through Gujarat(So great amount of solar energy), and also a rich source of sodium nitrate and potassium nitrate and a large flat surface is available in Kutch, So that Gama solar tower can be established there which will prove a great source of energy in future.

15

Thank you

Aziz Companiwala

2nd year mechatronics

Presented by