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  1. 1. welcome Moodlakatte institute of technology kundapura
  2. 2. • The transmission of energy from one place to ano without using wires. • Conventional energy transfer is using wires • But, the wireless transmission is made possible by various technologies…..
  3. 3. • Nikola Tesla in late 1890s • Pioneer of induction techniques • His vision for “World Wireless System” • The 187 feet tall tower to broadcast energy • All people can have access to free energy • Due to shortage of funds, tower did not operate
  4. 4.  Tesla was able to transfer energy from one coil to another coil  He managed to light 200 lamps from a distance of 40km  The idea of Tesla is taken in to research after 1 by a team led by Marin Soljačić from MIT. T is named as ‘WiTricity’.
  5. 5. i. As per studies, most electrical energy transfe through wires. ii. Most of the energy loss is during transmission iii. On an average, more than 30% iv. In India, it exceeds 40%
  6. 6. • Reliable • Efficient • Fast • Low maintenance cost • Can be used for short-range or long-rang
  7. 7. • Human beings or other objects placed between th transmitter and receiver do not hinder the trans of power. • Magnetic field tend to interact very weakly with biological tissues of the body, and so are not p cause any damage to any living being.
  8. 8. There are mainly 3 major types of wireless energy transfe Short range – INDUCTIVE COUPLING Medium range – RESONANT INDUCTION Long range power transfer – ELECTROMEGNETIC WAVE
  9. 9. 1) Ground based power transmission 2) Space based power transmission
  10. 10. But Space-based power transmission is preferred based power transmission Ground is (obviously) cheaper per noontime watt, but: · Space gets full power 24 hours a day – 3X or more Watt-hours per day per peak watt – No storage required for nighttime power · Space gets full power 7 days a week – no cloudy days · Space gets full power 52 weeks a year – No long winter nights, no storms, no cloudy seasons · Space delivers power where it’s needed – Best ground solar sites (deserts) are rarely near users · Space takes up less, well, space – Rectennas are 1/3 to 1/10 the area of ground arrays – Rectennas can share land with farming or other uses.
  11. 11. Solar Power Satellites (SPS) have proposed to collect sola energy in space and beam it down to the Earth.
  12. 12. • There is no air in space, so the satellites would receive somewhat more intense sunlight, unaffected by weather. • The SPS concept is simpler than most power systems here on earth. • Solar radiation can be more efficiently collected in space, where it is roughly three times stronger than on the surface of the Earth and it can be collected 24 hours per day (since there are no clouds or night in high Earth orbit). • SPS does not use up valuable surface area on the Earth
  13. 13. Four basic steps involved in the conversion of solar energy electricity and delivery are: Capture solar energy in space and convert it to electricity Transform the electricity to radio frequency energy and transmit it to Earth Receive the radio frequency energy on Earth and convert it back to electricity Provide the electricity to the utility grid
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  16. 16. • Microwave Transmitting Satellites about 35,000 km above Earth’s surface. microwave transmitting satellites are massive, the solar reflectors spanning up to 3 km and weighing over 80,000 metric tons. capable of generating multiple gigawatts of power, enough to power a major U.S. city.
  17. 17.  Unlimited energy resource  Energy delivered anywhere in the world Zero fuel cost Zero CO2 emission Minimum long-range environmental impact Solar radiation can be more efficiently collected i
  18. 18. Launch costs  Capital cost even given cheap launchers Would require a network of hundreds of satellites Possible health hazards The size of the antennas and rectennas Geosynchronous satellites would take up large sections of Interference with communication satellites