wireless power transmission via LASER

Paper presentation on

Smart energy and power system-Application of Wireless energy transmission via LASER

Presented by- Chinmay S Chepurwar

RGI TRPCS-36G.H Raisoni College Of Engineering

(An Autonomous Institute under UGC act 1956,affilated to RTMNU, Nagpur)Department of Electronics Engineering

Overview•Why solar energy??•What is wireless energy transmission??•Why to use wireless energy transmission via LASER for solar energy??•How to build smart power system with the help of WET??•Directly pumped solar LASER•How the power system will work?•How it will increase the efficiency of power plants??•A plan for India•Complete protecting system for earth

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Why solar energy??

•India is fastest growing economy with home of 1.5 billion people .•Largely depended on conventional sources of energy & imported oil .•Sun- The only source of energy to the earth. •Geographical conditions of India.

What is wireless energy transmission??

•Possible – by magnetic field or electromagnetic field.•One form of energy is converted into another transmissible form and again into usable form.•Our interest lies in transmission via LASER.

Why to use wireless energy transmission via LASER for solar energy??

•Long distance transmission possible.•Solar energy- Not a concentrated source of energy.•Losses due to scattering of light.•Presently only 3% of solar energy is being utilized.•To increase efficiency of power station.•Reduce the size of power plants.•Increase power generation capacity of power plant.

Solar power intensity is

just- 137mW/cm2

A quick view to intelligent power system with the help of WET!

How to build smart power system with the help of WET??

•Huge solar tower to be set up to set up at geostationary orbit.•Structure of solar tower- Huge tower attach with directly pumped solar LASER diodes , mirrors , lens ,controlling system for beam.•Receiving power stations all over India.•Power station – array of high efficiency high power solar cell.•Controlling station.•So energy conversion –solar energy to concentrated light energy – electrical energy.

Directly pumped solar LASER

•P-N junction diode operating in forward direction•Uses electron hole pair as exciting material.•Directly exited by solar energy.•GaAs LASER best material for Lasing action.•High efficiency about 50% to 75%.•Inherently light weight.•Output wavelength -800 to 900 nm close to peak response wavelength of today's solar cells.•Need of mirror or lens for concentrating light for population inversion.

How the power system will work?

•The huge solar towers directly convert solar energy into concentrated LASER beam.•LASER beam will be concentrated on receiving power station.•Highly efficient solar cells or rectenna will convert it into electric energy.•This station will supply power to nearby area.•With this technology it is expected 1GW of power can be generated.

How it will increase the efficiency of power plants??

•More energy will be concentrated on small area.•Receiving energy will lie in useful energy band in spectrum.•High efficiency of LASER diode.•Input to panels will be sunlight+ concentrated beam.•Improve losses due to transmission via wires.•Efficiency of system will be 35% to 40% much more than present plants.

Electrical Power Demand

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0 6 12 18 24/0Time (Hours)

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Normalized Output from SPS

(Non-Tracking Arrays)

Normalized Output from Sun

Normalized Total Output

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6 12 18 24Time (Hours)

+ =

Typical Electricity Demand

Total Power at PV ReceiverPV Power from WPT-LightPV Power from Sunlight

Sunlight + Laser-PV WPT = ~ Power RequirementPhoto-Voltaic (PV) Power Station Receives Both

A plan for India

A plan for India

•Can be used as mobile power station•A controlling station for satellite on the earth.•Receiving power stations in each state.•Specially remote areas like lakhshwadeep Andmaan Nicobar islands, North Eastern region military areas,Jammu Kashmir.•Power should be supplied to these station periodically.•If any region suffers from power shortage beam should be directed to that region.•Power can be supplied to neighboring countries.

Complete protecting system for earth

Celestial body

Other application

•To supply power to rover•Defense•Source of light in emergency.

Limitations & solutions

cost Effect on atmosphere Effect on living beings Delay in application due to

restricted development in nanotechnology

Placing in geostationary orbit

Project should be multinational Frequency can be adjusted to

infra-red Area should be restricted or

established in desert area like AREA 47.

More research in nanotechnology.

Multi-mission project.

Thank you!!!!