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Space Elevator for Future Prosperity

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Space Elevator for Future Prosperity 2010 Dasan Conference Green Transportation System October 27, 2010 – PowerPoint PPT presentation

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Title: Space Elevator for Future Prosperity


1
Space Elevator for Future Prosperity
2010 Dasan Conference Green Transportation
System
by Tai Sik Lee Hanyang University, Korea
October 27, 2010
2
Space Elevator?
Efficient and safe transportation system between
Earth and Space
Long anchored tether between Earth and Space
Space tourism
3
SE from Science Fiction
4
Principal of SE
Source Brad Edwards, The Space Elevator
building our future
5
Simple Experiment to Understand SE
Anchor
? 100,000km
Earth
24h period circular motion
6
NASA Concepts of SE
  • Capture an asteroid and bring into Earth orbit
  • Mine the asteroid for carbon and extrude 10m
    diameter cable
  • Asteroid becomes counterweight
  • Maglev transport system
  • Tall tower base
  • Large system
  • 300 years to never...
  • From Smitherman, 1999

Source Brad Edwards, The Space Elevator
building our future
7
Brad Edwards Proposed System
  • First elevator 20 ton capacity (13 ton payload)
  • Constructed with existing or near-term technology
  • Cost (US10B) and schedule (15 years)
  • Operating costs of US250/kg to any Earth orbit,
    moon, Mars, Venus, Asteroids

Source Brad Edwards, The Space Elevator
building our future
8
Technical Issues of SE Construction
  1. What kind of SE concept?
  2. Materials and structures for SE
  3. Powering Climbers
  4. Location of SE anchor

9
Space Elevator System
Source Bryan Laubscher, Space Elevator Systems
Level Analysis, 3rd Annual International Space
Elevator Conference (2004)
10
Carbon Nanotubes (CNTs)
  • Carbon nanotubes measured at 200 GPa (54xKevlar)
  • Sufficient to build the elevator
  • Mitsui(Japan) 120 ton/yr CNT production,
    US100/kg
  • Sufficient to build the first elevator
  • CNT composite fibers 3-5 CNTs, 3 GPa, 5 km
    length
  • Not strong enough yet but a viable plan is in
    place to get there (Carbon Designs, Inc.)

5km continuous 1 CNT composite fiber
Source Brad Edwards, The Space Elevator
building our future
11
Initial Spacecraft
  • Deployment spacecraft built with current
    technology
  • Photovoltaic arrays receive power from Earth
  • An MPD electric propulsion moves the spacecraft
    up to high Earth orbit
  • Four 20-ton components are launched on
    conventional rockets and assembled

Source Brad Edwards, The Space Elevator
building our future
12
Climbers
  • Climbers built with current satellite technology
  • Drive system built with DC electric motors
  • Photovoltaic array (GaAs or Si) receives power
    from Earth
  • 7-ton climbers carry 13-ton payloads
  • Climbers ascend at 200 km/hr
  • 8 day trip from Earth to geosynchronous altitude

Source Brad Edwards, The Space Elevator
building our future
13
Power Beaming
  • Power is sent to deployment spacecraft and
    climbers by laser
  • Solid-state disk laser produces kWs of power and
    being developed for MWatts
  • Mirror is the same design as conventional
    astronomical telescopes (Hobby-Eberly, Keck)

Source Brad Edwards, The Space Elevator
building our future
14
Anchor
  • Anchor station is a mobile, ocean-going platform
    identical to ones used in oil drilling
  • Anchor is located in eastern equatorial pacific,
    weather and mobility are primary factors

Source Brad Edwards, The Space Elevator
building our future
15
Anchor Location
  • Equator Rotation velocity is higher than any
    other latitude (Slingshot effect), requires less
    energy to deploy SE
  • Considering natural event (earthquake, cyclone,
    and etc.), Maldives and Galapagos Islands are one
    of the appropriate location

Galapagos Islands
Galapagos Islands
Maldives
Maldives
ltCyclone Eventsgt
ltEarthquake Eventsgt
16
Technical Budget
Component Cost Estimate (US) Launch costs to
GEO 1.0B Ribbon production 400M Spacecraft 500M
Climbers 370M Power beaming stations
1.5B Anchor station 600M Tracking facility
500M Other 430M Contingency (30) 1.6B TO
TAL 6.9B Costs are based on operational
systems or detailed engineering
studies. Additional expenses will be incurred on
legal and regulatory issues. Total construction
should be around US10B. Recommend construction
of a second system for redundancy US3B
Source Brad Edwards, The Space Elevator
building our future
17
SE Operating Budget
Annual Operating Budget per year in
USM Climbers 0.2 - 2 each Tracking
system 10 Anchor station 10 Administration 10 Anc
hor maintenance 5 Laser maintenance 20 Other 30 T
OTAL (50 launches) 135 This is US250/kg
operating costs to any destination.
Source Brad Edwards, The Space Elevator
building our future
18
Advantages
  • Low operations costs - US250/kg to LEO, GEO,
    Moon, Mars, Venus or the asteroid belts
  • No payload envelope restrictions
  • No launch vibrations
  • Safe access to space - no explosive propellants
    or dangerous launch or re-entry forces
  • Easily expandable to large systems or multiple
    systems
  • Easily implemented at many solar system locations

19
Applications
  • Solar power satellites - economical, clean power
    for use on Earth
  • Solar System Exploration - colonization and full
    development of the moon, Mars and Earth orbit
  • Telecommunications - enables extremely high
    performance systems

Source Brad Edwards, The Space Elevator
building our future
20
Next Steps
  • Material development efforts are underway by
    private industry
  • Space elevator climber competition will
    demonstrate basic concept
  • Engineering development centers in the U.S.,
    Spain and Netherlands are under development
  • Technical conferences continuing
  • Greater public awareness
  • Increased financial support being sought

21
Thank You
cmtsl_at_hanyang.ac.kr
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