pres es ntation
TRANSCRIPT
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PRESESNTATION ON
SPACE-BASED SOLAR POWER
AJAY LASIYALROLL :1113331015
BATCH: 2011-2014
NOIDA INST ITUTE OF ENGINEERING AND TECHNOLOGY
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OVERVIEW
• Introduction• History• Design• Advantage • Disadvantage• Conclusion
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INTRODUCTION• SBSP is the concept of collecting solar
power in space for use on earth.
Using an “Solar Power Satellite” or a “Satellite Power System”
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CONTD…• Part of Solar Energy is lost on its way
through the atmosphere.• SBSP convert sunlight to microwaves
outside the atmosphere ,avoiding the losses, and the downtime due to the Earth’s rotation.
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HISTORY• The SBSP concept, originally known as
satellite solar power system (SSPS), was first described in November 1968.• Between 1978 and 1981, the Congress
authorized the Department of Energy (DoE) and NASA to jointly investigate the concept.• 1n 1997, NASA conducted its “Fresh Look”
study to examine the modern state of SBSP feasibility.
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CONTD…• In 1999, NASA’s Space Solar Power Exploratory
Research and Technology program (SERT) was initiated
SERT sandwich concept .NASA
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CONTD…
Shown is the assembly of a microwave transmission antenna
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DESIGN• SBSP essentially consists of three
elements :
• A means of collecting solar power in space, for example via solar concentrators, solar cells or a heat engine• A means of transmitting power to earth,
for example via microwave or laser• A means of receiving power on earth, for
example via a microwave antenna (rectenna)
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CONTD…• Two basic methods of conversion has been
studied:• Photovoltaic conversion uses
semiconductor cells to directly convert photons into electrical power.• Solar dynamics uses mirrors to
concentrate light on a boiler.
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CONTD…• Most analysis of SBSP have focused on a
Photovoltaic conversion (commonly known as “solar cells”) • The use of Solar dynamic could reduce
mass per watt.
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ADVANTAGE• The SBSP concept is attractive because
space has several major advantages over the Earth’s surface for the collection of solar power-
• There is no air in space, so the collecting surfaces could receive much more intense sunlight.• Consequently, collection in orbit is
approximately 144% of the maximum attainable on Earth’s surface.
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CONTD…
• Orbiting satellites can be exposed to a consequently high degree of solar radiation, generally for 24 hours a day, whereas surface panels can collect for 12 hours per day at most.• A collecting satellite could possibly direct power
on demand to different surface locations based on geographical base load or peak load power needs.• Elimination of Plant and Wildlife interference.
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DISADVANTAGE• The SBSP concept also has a number of
problems:• The large cost of launching a satellite into
space • Inaccessibility: Maintenance of an earth based
solar panel is relatively simple, but performing maintenance on a solar panel in space incurs the extra cost of transporting a team of astronauts into space.• Special debris is a major hazard to large object
in space.• The large size and corresponding cost of the
receiving station on the ground.
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CONTD…
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CONCLUSIONSBSP requires enormous expenditure and man power and the concerns about the radiation and doubts about the efficiency and feasibility make us think twice about the feasibility of the project implementation.But it can’t be ignored that SBSP offers energy from an unending source.All in all, the positive aspects of such a system appear to outweigh the negative ones.Given the incredible benefits, not to mention tremendous need, it’s a no-brainer that this needs to happen.
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THANK YOU