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Power From Sun


my work of research - contains materials from IIT, Q cells , IEA and REC silicon

my work of research - contains materials from IIT, Q cells , IEA and REC silicon

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  • this slide is taken from Prof CS Solanki's ppt on Solar PV industry
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  • 1. Presentation on Summer Training Analysis of Solar Value Chain and Solar Outlook in Global and Indian Market. Jayanta Kumar Bora Roll no 23, MBA in Power Management
  • 2.
    • Introduction to Solar Power
    • Introduction to Value Chain
    • Importance of the Project
    • Findings from the Study
  • 3.
    • Sun as a resource- The average solar radiation on earth is 1000W/m 2 . In Other words the earth recieves the entire energy needed by us in just one Hour!
    • Almost 98% of the world’s energy needs are met by Solar Energy in one form or the other.
    • The remaining 2% comes from Geothermal Energy.
    • The Sun being an abundant source has always been a subject of research and there is a race to tame its power by the most advanced research labs in various countries, including India.
  • 4.
    • Some Methods of Direct Conversion of Solar Power
      • Solar Photovoltaics including Concentrator Photovoltaics.
      • Solar Thermal Power.
      • Solar Water Heating.
      • Solar Cookers.
  • 5. What is PhotoVoltaics? It is a method of direct conversion of Solar Energy into Electricity using Semi-Conductors( p-n Junction) The Incident Solar Radiation dislodges the electrons in the Semiconductor junction ( Solar Cell), thereby causing flow of Electricity
  • 6.
    • Photovoltaics systems in use
  • 7. Upstream DownStream
  • 8.
    • Why Si?
      • Solar energy (PV) is a very fast growing market where the basic technology depends on availability of pure Si. This material is today in high demand and a shortage is expected.
      • Most analysts assume that silicon will remain the dominant PV material for at least a decade
      • One of Shell’s energy scenario indicates that solar energy will be the single largest energy source within 2060.  Solar PV would play important role in it
  • 9.
    • Why Si?
      • At the time being it is almost the only material used for solar cell mass production
      • Easily found in nature, Silicon oxide forms 1/3 of the Earth's crust
      • It is non-poisonous, environment friendly, its waste does not represent any problems
      • It is fairly easy formed into mono-crystalline form
      • Its electrical properties with endurance of 125°C
      • Si is produced with 99.9999999% purity in large quantities.
  • 10.
    • Processing of MG-Si
      • This is the One of the most significant process of the Value Chain, conversion of MG-Si( 98-99% pure ) is an energy intensive process and is by far the most value adding process in the Value Chain.
      • There are two established technologies in this process
        • Seimens Reactor Method
        • Fluidised Bed Reactor ( this is a relatively new technology)
      • This Process apart from being most energy intensive is also most “capital” intensive in the value chain.
  • 11.
    • Processing of MG-Si
      • MG-Si is material with 98-99% purity,
      • Produced in about 1 Million tons per year
  • 12.
    • Produced in countries which cheap electricity and quartz deposits (USA, Europe, Brazil, Australia, Norway)
    • MG-Si  EG-Si: impurities reduction by five order of magnitude is required convert MG-Si to gaseous chlorosilanes or silane, purified by distillation
    • For instance Trichlorosilane SiHCl 3 and silane SiH 4
    • Electronic grade (EG-Si), 1 ppb Impurities ,99.99999999%
  • 13.
    • Processing of EG-Si
      • This high purity silicon is obtained in granules and it is converted into Ingots in a furnace
  • 14.
    • Wafers are Sliced in a Cutter (Wire Saw Cutter)
    Wires moving over rollers Ingots being fed
    • Ingots to Wafers
  • 15.
    • Wafers are dipped in solution for polishing and doping
    • This process is consumes some amount of silica from the wafers.
    • Processing of Wafers
  • 16.
    • Cells from wafers – the wafers are converted to cells after proper processing( doping , making layers of wafers and protective coating )
  • 17.
    • The cells hence produced are assembled in large quantity and Modules are made
  • 18.
    • Advantages of Solar PV
    • No Fuel Cost
    • Best for Remote Application
    • Less Maintenance Cost
    • Theoretically its possible to suffice all our energy needs by Solar PV
    • No pollution during electricity Generation
    • Generation curve follows demand curve in Day time
    • Disadvantages of Solar PV
    • Costly
    • Remains a net energy Consumer during first 3 yrs of operation
    • Poor efficiency
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  • 19.
    • The study was done to find out the answers to the following questions
      • Why is Solar Photovoltaic Costly?
      • Is there a way to reduce cost of Solar PVs ?
      • What is the market trend in the Solar PVs?
      • What are the Risks in the Industry?
      • Which is the most significant stage in the Value Chain?
      • What are the cost components in Each stage of manufacturing?
      • What is the earning trend of Global Majors in the market?
      • What is the capital involved in the Value Chain.
  • 20.
    • Value Chain Mathematics
      • 10MT of Polysilica = 1 MWp of Solar Cells
      • Raw Material (MG-Si) = $4/Kg
      • Polysilica = $70-400/kg
      • Time to ramp up a 100MW facility = 12-24months
      • The capital intensity( capital required for starting a new project) varies along the value chain
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  • 26. Question and Answer Session