akole - solar energy- p1

7/30/2019 Akole - Solar Energy- P1

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M.D.Akole

(President, MASMA)


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The total solar energy absorbed by Earth's atmosphere,

oceans and land masses is approximately

3,850,000 exajoules (EJ) per year. In 2002, this was more

energy in one hour than the world used in one year.

Photosynthesis captures approximately 3,000 EJ per year

in biomass.

The amount of solar energy reaching the surface of the

planet is so vast that in one year it is about twice as much

as will ever be obtained from all of the Earth's non-

renewable resources of coal, oil, natural gas, and mined

uranium combined.
http://en.wikipedia.org/wiki/Joulehttp://en.wikipedia.org/wiki/Joule


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Solar Thermal systems are systems which convert Solar Energy

into Thermal Energy.

Solar Concentrators are devices which concentrate the energy

falling over a large surface onto a smaller surface.

This leads to higher temperatures which can be used for a

range of applications.


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Solar Thermal systems can be broadly classified as:


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The low temperature systems are systems whichoperate from room temperature to 80-85 degreecentigrade.

These include systems for : Boiler feed pre-heating,

drying, heating of chemical baths, textiles etc. The basic solar device used for these systems are the

water heating collectors, namely the Flat PlateCollector and the Evacuated Tube Collector.

Drying systems utilise the Air-heating collectors. Drying systems can also be used for Effluent

Evaporation.


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These processes are carried out from 90/95 upto 200degree centigrade.

These include:

A. Chemical industries.

B. Dairy applications.

C. Textile industries.

D. Pharmaceutical industries.

E. Food processing. F. Cooling requirements (VAM based air-conditioning)

to name a few.


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These temperature requirements can be met with theuse ofSolar Concentrators.

Solar Concentrators are devices through which high

concentration of the Suns rays is achieved resulting inhigh temperatures.

Solar Concentrators are also categorised as mediumtemperature concentrators and high temperature

concentrators.


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Medium Temperature concentrators are concentratorsthat are best suited for applications in the mediumtemperature range. e.g. Scheffler Concentrator.


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Scheff ler Concentrator is an Unique Concentratorwhich has a fixed focus and which tracks independentof the receiver.

Temperature range: Suitable for applications upto 160-180 degree centigrade.

Ideal Applications: All processes which haverequirements of temperature and pressure upto 180

degree centigrade and 10 kg/cm2. Solar Kitchen is a very popular application of the

Scheff ler Concentrator.


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Industrial canteens consume a large quantity of LPGfor cooking.

These can be converted to Solar Kitchens thusreducing the LPG consumption upto 50%.


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These applications lie in the range of 200-450 degreecentigrade.

The concentrators required for these applications arethe Parabolic Trough Collectors (PTCs) and the ARUNparaboloid dish.

These Concentrators are capable of producing veryhigh temperatures and pressures and are best suited to

cater to this segment.


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Abundant and free source of energy. Completely non-polluting and clean source.

Best suited for industrial applications amongst allrenewable energies.

Ever increasing costs of fuel.

Ever increasing pollution due to combustion of fossilfuels.

Solar energy equipment can be easily incorporated inthe existing process.

Existing heating system can be used as backup forinclement weather conditions.


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Medium temperature applications:

20 million tonnes of oil/year saved = Rs. 80Kcrore/year.

High temperature applications:35 million tonnes of oil/year saved = Rs. 140K

crore/year.


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80% accelerated depreciation in the first year.

Capital Subsidy @30%.

Green image for the organisation.

Fuel savings provide an edge over competion.


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The approximate payback periods for the differentsystems are as follows:

Low temperature: 1.5-2 years.

Medium temperature: 2.5-3.5 years. High temperature: 3.5-5 years.


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Proven indigenous technology.

Answer to ever-increasing fuel bills.

Pollution free, clean source of energy.

Abundantly available. Easy to operate systems.

Low on maintenance.

Attractive payback.


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Thank You!!!

akole - solar energy- p1

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