Solar ConcentratorPower Plant

Prepared by :A2 Batch

(Mechanical Dept.)B.H.G.C.E.T.-Rajkot

What is Solar Concentrator ?• Concentrated solar power (also called

concentrating solar power, concentrated solar thermal, and CSP) systems generate solar power by using mirrors or lenses to concentrate a large area of sunlight, or solar thermal energy, onto a small area.

• Electricity is generated when the concentrated light is converted to heat, which drives a heat engine (usually a steam turbine) connected to an electrical power generator or powers a thermochemical reaction.

History

• Professor Giovanni Francia (1911–1980) designed and built the first concentrated-solar plant, which entered into operation in Sant'Ilario, near Genoa, Italy in 1968.

• This plant had the architecture of today's concentrated-solar plants with a solar receiver in the center of a field of solar collectors.

• The plant was able to produce 1 MW with superheated steam at 100 bar and 500 °C.

How Do Solar Concentrators Work?

• A solar concentrator uses lenses, called Fresnel lenses, which take a large area of sunlight and direct it towards a specific.

• spot by bending the rays of light and focusing them. Some people use the same principle when they use a magnifying lens to

• focus the Sun's rays on a pile of kindling or paper to start fires.

Fresnel Reflector :•Fresnel reflectors are made of many thin, flat mirror strips to concentrate sunlight onto tubes through which working fluid is pumped.

•Flat mirrors allow more reflective surface in the same amount of space as a parabolic reflector, thus capturing more of the available sunlight, and they are much cheaper than parabolic reflectors.

•Fresnel reflectors can be used in various size CSPs.

Future• A study done by Greenpeace International, the European Solar

Thermal Electricity Association, and the International Energy Agency's SolarPACES group investigated the potential and future of concentrated solar power.

• The study found that concentrated solar power could account for up to 25% of the world's energy needs by 2050. The increase in investment would be from 2 billion euros worldwide to 92.5 billion euros in that time period.

• Spain is the leader in concentrated solar power technology, with more than 50 government-approved projects in the works. Also, it exports its technology, further increasing the technology's stake in energy worldwide.

Design Of Tower• Some Concentrating Solar Power Towers are air-cooled

instead of water-cooled, to avoid using limited desert water.• Flat glass is used instead of the more expensive curved glass.• Thermal storage to store the heat in molten salt containers to

continue producing electricity while the sun is not shining.• Steam is heated to 500 °C to drive turbines that are coupled to

generators which produce electricity.• Control systems to supervise and control all the plant activity

including the heliostat array positions, alarms, other data acquisition and communication.

• Generally, installations use from 150 hectares (1,500,000 m2) to 320 hectares (3,200,000 m2).

Thank You…!!Behalf of

Whole Mechanical Dept.

Queries….!!?