Space elevator
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The document discusses plans for building a space elevator using carbon nanotubes. A space elevator would consist of five major sections: the anchor station on Earth's equator, the ribbon/tether made of carbon nanotubes extending into space, counterweights beyond geostationary orbit, climbers that would ascend and descend the tether, and an anchor platform in the ocean. Carbon nanotubes are proposed for the tether due to their immense strength, resilience when bent, and stability at high temperatures. A space elevator could provide low-cost access to space and open up opportunities for solar power satellites and exploration of the solar system.
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Space elevator
- 1. SPACEELEVATOR Made by: Vishwajit Sunil Kathe Mechanical engineering 3rd year Seat No. T120620894 … building our future
- 2. Contents
- 3. How could we build Space elevator ? The Ribbon(Tether) The Anchors The Climbers Counter weight There are Five Major Sections
- 4. What is 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
- 5. What is Climbers Climbers built with current satellite technology Drive system built with DC electric motors Photovoltaic array (Ga As or Si) receives power from Earth 7-ton climbers carry 13-ton payloads Climbers ascend at 200 km/hour 8 day trip from Earth to geosynchronous altitude Initial 200 climbers used to build ribbon
- 6. Comparison between CNTs & Metal wire Property Single Walled Nanotubes Metal wires Tensile Strength 45 billion Pascal High strength steel alloys break at about 2 billon Pascal Resilience Can be bent at large angles and re-straightened without damage Metals and carbon fibers fracture at grain boundaries Temperature stability Stable up to 2800 degrees in vacuum, 750 degrees in air Metal wire in microchips melt at 600 to 1000 degrees C
- 7. What is need to Build space elevator ?
- 8. What is Ribbon ? 1. Ribbon is long cable of light ,flexible , Ultra Strong Metal which provides grip for climber 2. Ribbon means tether cable 3. Tether is made of carbon nanotubes 4. Tether which holds two components one is anchor and counter weight 5. It is a long ribbon of carbon nanotubes that would be wound into a spool that would be launched into the orbit. 6. The cable made of a material with a large tensile strength/density ratio
- 9. Why we use Ribbon carbon nanotubes ? Reason to use ribbon carbon nanotubes because of its properties which can with stand or handle extremely bad conditions Example of Conditions are atmospheric changes Carbon nanotubes are extremely tiny rolled-up, three dimensional carbon tubes, made of a hexagonal graphite lattice . They are at least 1000 times stronger than steel rods of the same size and are one-sixth the weight of steel They are as flexible as steel. They are categorized as single and multi walled tubes
- 10. What is Advantages ? Low operations costs - US$250/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
- 11. What is 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
- 12. Conclusion The space elevator is revolutionary eath to space transportation system that enable space exploration High transmission in telecommunication Aim is to create space elevator as a free system