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Solar Energy, How it works and benifits.pptx
- 1. SOLAR POWER
- 2. Solar Power • Energy from the sun • Converted into electricity or used to heat air, water, etc. • Two types of solar technologies Solar PV (Photovoltaic) • Most common • Continuously emerging SolarThermal • Small scale thermal technology - to heat space or water (solar hot water systems, etc.) • Concentrated Solar thermal In 2021, 12% of Australia’s total electricity generation was from solar
- 3. Solar PV • Solar cells made from Silicon • N layer – with electrons(-), P layer – with holes (+) • Solar rays contain photons • Solar rays penetrate to PN junctions and knock electrons out from atoms • Electrons move towards P junction while holes move towards N junction • When load is connected, electron flow will be continued through the circuit • Shading has to be avoided to take full Solar Output – Bypass Diodes Solar Panels and Shade
- 4. Factors Affecting Solar Generation • Solar Irradiance (W/m2) • Shading • Panel Orientation • Temperature • Location (longitude/latitude) • Time of year • Dust and dirt
- 5. Type of Solar Panels Monocrystalline • High efficiency, ~ 20% • Best for commercial use • high life-time value Polycrystalline • Lower price • Low efficiency, ~15% • Sensitive to high temperatures Thin-Film • Relatively low costs • Low efficient, ~10% • Easy to produce & flexible Concentrated PV Cell • Very high efficiency, ~40% • Cost is high
- 6. Type of Inverters • PV panels produce DC current • Inverter is required to convert DC to AC String Inverter • Cheap • Output can be dropped due to shading Power Optimizers • Reliable than string inverters • Effect of the shading is minimal • Need reliable communication between optimizers and inverters Micro Inverters • Extremely reliable • Better Output • Expensive
- 7. Type of Solar PV Systems • Grid Tied • Always connected to grid • Could not be operated when grid is not available (Anti-Islanding) • Isolated • Need to have batteries • Generators also required for back up
- 8. How Solar PV Benefit to us? • Solar Power can be used to reduce both, • Cost of energy consumption • Maximum Demand Charge • Solar connection can be Gross or Net • Excess energy can be fed under FIT (Feed inTariff) to national grid
- 9. Future of Solar PV • It has been predicted that Australia could source 86% of its electricity from solar and wind by 2050 • Higher demand with decarbonisation targets and emerging EV market • New technologies like, • Floating Solar • Solar Fabric • Microgrids, Nanogrids
- 10. THANKYOU!
- 11. SolarThermal • Small scale solar hot water systems • Heated liquid (Propylene glycol (PG)) transferred through the hot water cylinder • Electric or gas fired heaters to boost the system • Concentrated Solar thermal • Used for large-scale power generation • Mirrors to reflect sunlight to a receiver • Transfers the heat to a thermal energy storage system