Space-based solar power is the concept of collecting solar power in space for use on Earth. It has been in research since the early 1970s. SBSP would differ from current solar collection methods in that the means used to collect energy would reside on an orbiting satellite instead of on Earth's surface. Process: A means of collecting solar power in space. A means of transmitting power to earth. A means of receiving power on earth.

1. Space Based Solar Power
By
Mohd Leesan (1RV17LVS17)
VLSI and Embedded System
Research Methodology
Dept. of ECE, PG VLSI, RVCE Marching Ahead 1

2.  Introduction
 Literature
 Methodology
 Progress Status
 Advantages
 Challenges
 Conclusion
Contents
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3.  Space-based solar power is the concept of collecting solar power in space
for use on Earth. It has been in research since the early 1970s.

 SBSP would differ from current solar collection methods in that the means
used to collect energy would reside on an orbiting satellite instead of on
Earth's surface.

 Some projected benefits of such a system are a higher collection rate and a
longer collection period due to the lack of a diffusing atmosphere and night
time in space.

 Part of the solar energy (55-60%) is lost on its way through the atmosphere
by the effects of reflection and absorption. Space-based solar power
systems convert sunlight to microwaves outside the atmosphere, avoiding
these losses, and the downtime due to the Earth's rotation.
Introduction
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Research Methodology
Dept. of ECE, PG VLSI, RVCE Marching Ahead

4. Literature Survey
 Originally known as satellite solar-power system (SSPS), was first described
in November 1968.

 Glaser, Peter E. was granted U.S. patent number 3,781,647 for his method of
transmitting power over long distances using microwaves from a very large
antenna.

 In 1997 NASA conducted its "Fresh Look" study to examine the modern state
of SBSP feasibility.

 On Nov 2, 2012, China proposed space collaboration with India.

 NASA's Space Solar Power Exploratory Research and Technology program
(SERT) was initiated.
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Research Methodology
Dept. of ECE, PG VLSI, RVCE Marching Ahead

5. Conti..
 May 2014 IEEE Spectrum magazine has a lengthy article "It's Always Sunny in
Space" by Dr. Susumu Sasaki.
 JAXA announced on 12 March 2015 that they wirelessly beamed 1.8 kilowatts
50 meters to a small receiver by converting electricity to microwaves and then
back to electricity.

 On 12 March 2015 Mitsubishi Heavy Industries demonstrated transmission of
10 kilowatts (kW) of power to a receiver unit located at a distance of 500
meters away.
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Research Methodology
Dept. of ECE, PG VLSI, RVCE Marching Ahead

6. Methodology
 To design and develop a Space-based solar farm that would generate 1GW of
power. This will require an area of 4 sq. Km consisting of rows of solar
panels. This space solar farm will be housed 36,000 km above the earth
surface.

 A means of collecting solar power in space.
 A means of transmitting power to earth.
 A means of receiving power on earth.
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Research Methodology
Dept. of ECE, PG VLSI, RVCE Marching Ahead

7. Microwave power transmission
Power transmission via radio waves can be made more directional, allowing
longer distance power beaming, with shorter wavelengths of electromagnetic
radiation, typically in the microwave range.
A rectenna may be used to convert the microwave energy back into electricity.
NASA Study of solar power satellites required a 1-km diameter transmitting
antenna, and a 10 km diameter receiving rectenna, for a microwave beam at 2.45
GHz.
Experiments in the tens of kilowatts have been performed .
Conversion efficiency under experimental conditions was measured to be around
54% efficient.
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Research Methodology
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8. Earth-based receiver
The Earth-based rectenna would likely consist of many short dipole antennas
connected via diodes.
Microwave broadcasts from the satellite would be received in the dipoles with
about 85% efficiency.
Rectennas would likely be several kilometers across.
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Research Methodology
Dept. of ECE, PG VLSI, RVCE Marching Ahead

9. Progress Status
 There are many technological challenges to solve before SSPS can be
implemented.

 However, they have just moved from the study phase to the technology
demonstration phase.

 Researchers have started preparation for the world’s first demonstration of
1kW-class wireless power transmission technology, and are aiming for
practical use in the 2030s.
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Research Methodology
Dept. of ECE, PG VLSI, RVCE Marching Ahead

10. Advantages
 There is no air in space, so collecting surfaces could receive much more
intense sunlight.

 The intensity in orbit is approximately 144% of the maximum attainable
intensity on Earth's surface.

 Excess heat is radiated back into space.

 Power can be beamed to the location where it is needed, don’t have to invest
in as large a grid.
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Research Methodology
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11. Challenges
 Dealing with launch costs

 Efficient and light space-qualified solar arrays

 Space Assembly, Maintenance and Servicing, and Large in-space structures
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Research Methodology
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12.  High Capital Costs
 Long Payback
 No Fossil Fuel Feed
 Renewable
 2.07 GW (peak)
Comparison
High Capital Costs
Long Payback
No Fossil Fuel Feed
Renewable
2.5 GW (sustained)
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Research Methodology
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13. References
[1] A Study on Space-based Solar Power System by Anveshi Atul p- ISSN: 2319-
2399.
[2] Rectennas for Wireless Energy Harvesting by Jingwei Zhang and Yi Huang
[3] https://energy.gov/articles/space-based-solar-power
[4] http://www.nss.org/settelment/ssp/
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Research Methodology
Dept. of ECE, PG VLSI, RVCE Marching Ahead

14. THANK YOU
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Research Methodology
Dept. of ECE, PG VLSI, RVCE Marching Ahead