SOLAR THERMAL ENERGY

C.KARUN KUMARSwarnandhra Engineering College

INTRODUCTION

• Solar energy is most efficient , harmless and renewable energy source

• Solar energy is very economical• Solar energy is available everywhere

• Involves high initial costs

• Unavailability at all times

BACKDROPS OF SOLAR ENERGY

• CSP stands for Concentrated Solar Power• Concentrated Solar Power (CSP) is a

process of concentrating heat in one point

CSP

• A Heliostat (from Helios, the Greek word for sun, and stat, as in stationary)

• Heliostat is a device that includes a mirror, usually a plane mirror, which turns so as to keep reflecting sunlight toward a predetermined target

HELIOSTAT

• Reflective surface of mirror is kept perpendicular to the bisector of the angle between the directions of the sun and target

• Installed capacity – 20 MW• Annual generation – 110 GWh• Heliostats – 2,650

GEMASOLAR POWER PLANT

• The concentrated solar power used to heat fluid deposit

• Working fluid is heated upto 250–1000°C• This fluid is used to run steam turbine

WORKING

TYPES OF SOLAR CONCENTRATERS

• Heliostats• Parabolic trough collectors• Stirling dish• Fresnal concentrator

PARABOLIC TROUGH COLLECTORS

STIRLING DISH

FRESNAL CONCENTRATOR

• Capable of supplying power continuously• High potential under the Renewable energy

sources• Solar collectors absorb the energy from the

sun 3-4 times more efficiently than solar cells.

• The price of solar collectors is about 3 times less than the price of solar cells.

• A solar collector also generates energy on cloudy days

ADVANTAGES OF STP

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