wireless power transmission via solar power satellite
JODHPUR INSTITUTIONS OF ENGINEERING AND TECHNOLOGY
• The transmission of energy from one place to anowithout using wires.• Conventional energy transfer isusing wires• But, the wireless transmission is made possible byvarious technologies…..
• 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 notoperate
Tesla was able to transfer energy fromone coil to another coil He managed to light 200 lamps from adistance of 40km The idea of Tesla is taken in to research after 1by a team led by Marin Soljačić from MIT. Tis named as „WiTricity‟.
i. As per studies, most electrical energy transfethrough wires.ii. Most of the energy loss is during transmissioniii. On an average, more than 30%iv. In India, it exceeds 40%
• Reliable• Efficient• Fast• Low maintenance cost• Can be used for short-range or long-rang
• Human beings or other objects placed between thtransmitter and receiver do not hinder the transof power.• Magnetic field tend to interact very weakly withbiological tissues of the body, and so are not pcause any damage to any living being.
There are mainly 3 major types of wireless energy transfeShort range – INDUCTIVE COUPLINGMedium range – RESONANT INDUCTIONLong rangepower transfer – ELECTROMEGNETIC WAVE
1) Ground based power transmission2) Space based power transmission
But Space-based power transmission is preferredbased power transmissionGround 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.
Solar Power Satellites (SPS) have proposed to collect solaenergy in space and beam it down to the Earth.
• 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 threetimes 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
Four basic steps involved in the conversion of solar energyelectricity and delivery are:Capture solar energy in space andconvert it to electricityTransform the electricity to radiofrequency energy and transmit it to EarthReceive the radio frequency energy on Earth andconvert it back to electricityProvide the electricity to the utility grid
Unlimited energy resource Energy delivered anywhere in the worldZero fuel costZero CO2 emissionMinimum long-range environmental impactSolar radiation can be more efficiently collected i
Launch costs Capital cost even given cheap launchersWould require a network of hundreds of satellitesPossible health hazardsThe size of the antennas and rectennasGeosynchronous satellites would take up large sections ofInterference with communication satellites