Rajnish

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SOLAR COLLECTOR

BY:-RAJNISH KUMAR

Regd no:-1101214070Branch:-ELECTRICAL

ENGINEERING

UNDER THE GUIDANCE OF :-MINAKSHI SINGH

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Expose a dark surface

to solar radiation so

that the radiation is

absorbed. This heat is

then transferred to

thermal/heat storage

tank and utilized.

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CONCENTRATING TYPE NON-CONCENTRATING TYPE

(FLAT-PLATE COLLECTOR)A)LIQUID FLATE-PLATE COLLECTOR

B)FLAT-PLATE AIR-HEATING COLLECTOR

FOCUS TYPE

NON-FOCUS TYPEA)MODIFIED FLAT-PLATE COLLECTOR

B)COMPOUND-PARABOLIC CONCENTARING(CPC)TPYE

LINE FOCUS(ONE AXIS TRACKING)

A)Cylindrical parabolic concentractor

B)Fixed mirror solar concentratorC)Linear Fresnel lens collector

POINT FOCUS(TWO-AXIS TRACKING)A)Paraboloidal dish collector

B)Hemispherical bowl mirror conc.C)Circular Fresnel lens conc.

D)Central Tower receiver

FLATE PLATE COLLECTOR

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• Consist of casing, absorber plate, transparent glass covers, insulating material and fluid passage tubes.

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• Device that collects solar radiation and heats a coolant, which in turn will be used in residential settings to heat water or the home.

A flat-plate collector is placed at a point such that its length aligns with the line of longitude and is suitably titled towards south to have maximum collection.

Here, β=Tilt Angle or slope of plateβ 6

Θz=Zenith angle

α=inclination angle

γs=solar azimuth angle

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φ=angle of latitudeΔ=declination

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Θi=angle of

incidence,ω=hour angle β=tilt angle

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It is similar to LFPC with change in the configuration of the absorber and tube.Air is used directly as the working fluid.Pressure no becomes very high

inside the collector.

It increase concentration of solar radiation on the flat absorber.

It has a large acceptance angle and increase the concentration ratio.

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Reflector &metal tube receiver at its focal line.black receiver tube increase

absorption.It rotate about one axis to track the sun.

It consist of fine ,linear grooves on the surface of the reflecting material on one side & flat on the other side

is used.A concentration ratio of 10 to 30 may be realized which yeld temp 150 to 300 degree.

It consist long narrow fixed mirror strip on the

circular reference cylinder with a tracking receiver tube.Tube is made to

rotate about the centre of curvature of the reflector

module to track the sun.the concentration ratio near same as the number of mirror strip.

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It rotate about its optical axis aparaboloidal shape is produced.Beamradiation is focused at a point in theparaboloid.Required two axistracking.PDC of 6-7m in diameter arecommercially manufactured.

It consist hemispherical fixed mirror a tracking absorber and a supporting

structure.All ray enter & after reflection cross the paraxial line at the some pt b/n

the focus and the mirror surface.

It is used where high flux is desired such as with silicon solar cells or gallium arsenide solar cells as receiver.It divided number of thin circular zones.theconcentration ratio may be high as 2000 but less than paraboloidalreflector.Tracking is required to keep the small solar image centered on the receiver.

In CTRC the receiver is located at top of the tower.Thousands of such heliostats track the sun to direct the beam radiation on the receiver from all sides.Concentration ratio of as high a value as 3000 can be obtained.Theabsorbed energy can be extracted from the receiver and delivered at a temp and pressure suitable for driving turbines for power generation.

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Solar energy should be given a chance if we want to protect the environment. We own it to our children, our grandchildren and the generations to come.

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