SOLAR CONCENTRATOR

NAME PRASENJIT DEROLL NO 21SECTION 1609 G1

WHAT IS SOLAR CONCENTRATOR?SOLAR CONCENTRATOR IS A DEVICE

WHICH CONCENTRATES THE SOLAR ENERGY INCIDENT OVER A LARGE SURFACE ONTO A SMALLER SURFACE

HISTORYPROFESSOR GIOVANNI FRANCIA DESIGNED

AND BUILT THE FIRST CONCENTRATOR SOLAR PLANT WHICH ENTERED INTO OPERATION IN SANTLLARIO,NEAR GENOVA, ITALY IN 1968.

THIS PLANT WAS ABLE TO PRODUCE 1 MW WITH SUPERHEATED STEAM AT 100 BAR AND 500 DEGREE CELCIUS.

THE NEXT ADVANCED SOLAR CONCENTRATOR WAS DEVELOPED IN SOUTHERN CALIFORNIA IN 1981,BUT THE PARABOLIC TROUGH

TECHNOLOGY OF THE NEARBY SOLAR ENERGY GENERATING SYSTEM (SEGS) BEGUN IN 1984 WAS MORE WORKABLE

HOW DO SOLAR CONTRATOR WORKS?A SOLAR CONCENTRATOR USES LENSES CALLED

FRESENEL LENS, WHICH TAKE A LARGE AREA OF SUNLIGHT AND DIRECT IT TOWARDS A SPECIFIC SPOT BY BENDING THE RAYS OF LIGHT AND FOCUSING THEM.

FRESENEL LENS ARE SHAPED LIKE A DART BOARD, WITH CONCENTRIC RINGS OF PRISMS AROUND A LENS THAT IS A MAGNIFYING GLASS. ALL OF THESE FEATURES LET THEM FOCUS SCATTER LIGHT FROM THE SUN INTO A LIGHT BEAM.

FUTURE OF SOALR CONCENTRATORYEAR ANNUAL

INVESTMENT GLOBALLY

COMMULATIVE CAPACITY

2015 21 BILLION EUROS 420 MEGAWATTS2050 174 BILLION EUROS 1500000

MEGAWATTSSTUDY DONE BY GREENPEACE USA INTERNATIONAL,THE EUROPEAN SOLAR THERMAL ELECTRICITY ASSOCIATION AND INTERNATIONAL ENERGY AGENCY SOLARPACES GROUP INVESTIGATED THE POTENTIAL AND FUTURE OF SOLAR CONCENTRATOR.THE STUDY FOUND THAT CONCENTRATED SOLAR POWER COULD ACCOUNT FOR UPTO 25% OF THE WORLD’S ENERGY NEEDS BY 2050.THE INCREASE IN INVESTMENT FROM 21 BILLION EUROS TO 174 BILLION EUROS IN THE TIME PERIOD.

ADVANTAGES 1. IT INCREASE THE INTENSITY BY

CONCENTRATING THE ENERGY AVAILABLE OVER A LARGE SURFACE ONTO A SMALLER SURFACE (ABSORBER).

2. DUE TO CONCENTRATION ON SMALLER AREA THE HEAT LOSS AREA IS REDUCED.

3. THE THERMAL MASS IS MUCH SMALLER THAN THAT OF FLAT PLATE COLLECTOR AND HENCE TRANSIENT EFFECTS ARE SMALL.

4. IT HELPS IN REDUCING THE COST BY REPLACING AN EXPENSIVE LARGE RECEIVER BY A LESS EXPENSIVE REFLECTING OR REFRACTING AREA.

DISADVANTAGES1. THE CONCENTRATOR IS AN OPTICAL SYSTEM AND HENCE THE OPTICAL LOSS TERMS BECOME SIGNIFICANT.2. IT WORKS ON BEAM COMPONENT OF SOLAR RADIATION RESULTING IN LOSS OF DIFFUSE COMPONENTS.3. HIGHER THE CONCENTRATION OF THE COLLECTOR HIGHER IS THE PRECISION OF OPTIC AND MORE IS THE COT OF THE UNITS.4. IN ADDITION TO THE COMPLEXITY OF THE SYSTEM THE MAINTAINENCE REQUIREMENTS ARE ALSO INCREASED.

RELEVANT INDUSTRIES

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