W P T

  • The transmission of energy from one place to another and without using wires.
  • Conventional energy transfer is using wires.
  • But, WPT is made possible by  various technologies...

History

  • Nikola Tesla in late 1890 s
  • Pioneer of induction techniques
  • His vision for World wireless systems
  • The 187 feet tall tower to broadcast
  • All people can have access to free energy
  • Due to shortage of funds, tower did not operate
  • Tesla was able to transfer energy one cell to another coil
  • He managed to light 200 lamps from distance of 40 km
  • The idea of Tesla taken in to  research after by team led by Marin Soljacic from MIT. is named as  "WiTricity"

Why not wireless???

  1. As per studies, most electrical energy transfers through wires.
  2. Most of the energy  loss is during transmission 
  3. On an average, more than 30%
  4. In India, it exceeds 40% 

Why   W P T ???

  • Reliable
  • Efficient
  • Fast
  • Low maintenance cost
  • can used for short-range or long-range

How safe is   W P T ????

  • Human beings or other objects placed between the transmitter and receiver do not hinder the  transmission of power.
  • Magnetic field tend to interact very weakly with biological tissues of the body, and so are not  cause any damage to any living being.

W P T   Basics :-

There are mainly  3 major types of wireless energy transfer
  • Short range  -  INDUCTIVE COUPLING
  • Medium range  -  RESONANT INDUCTION
  • Long range  -  ELECTROMAGNETIC  WAVE

TYPES OF  WPT

  1. Ground based power transmission
  2. Space based power transmission
But Space-based power transmission is preferred based transmission

Ground is 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 night time  -  Space gets full power 52 weeks a year
  • Space delivers power where it's needed
  • Best  ground solar sites (deserts) are rarely 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.

SOLAR POWER SATELLITE (SPS)

Solar power satellite (sps) have proposed to collect solar energy in space and beam it  down to the earth.




Why to use SPS ???

  • There is no air in space, so the satellite would receive some what more  intense sunlight, unaffected by weather.
  • The SPS concept simple than most power systems here on  earth.
  • SPS does not use up valuable surface area on the earth.
  • Solar radiation can be more efficiently collected in space, it can be collected 24 hours per day. 

Four basics steps involved in the conversion of solar energy into electricity and delivery are

 



HOW SPS Works???




ADVANTAGES

  • Unlimited energy resource
  • Energy delivered  any ware in the world
  • Zero fuel cost
  • Zero CO2  emission
  • Minimum  long-range environmental impact
  • Solar radiation can be more efficiently collected 

Dis advantages

  • Launch costs
  • Capital cast even given cheap  launchers
  • Possible health hazards
  • Would require a network of hundred of satellite
  • The size of the antennas and rectennas
  • Interference with communication satellites.