Lremptasts4b
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Long Range Electromechanical Power Transmission Along Space Transportation Structures James E. D. Cline
Although the transmission of energy across long distances is generally considered the domain of electrical conductors and electromagnetic radiation beams, in the field of very long space transportation structures it may be worthwhile to revisit electromechanical energy transmission distribution means. The form of delivery of transportation energy along a long transportation structure needs to be chosen in overall context with its application, such as the job of cleanly enabling a high technology worldwide civilization through adequate access to GEO space resources, all done carefully and quickly enough before our bourgeoning haphazard civilization can destroy itself.
A chosen transportation system has to be up to doing the overall job providing for civilization’s near future needs: in more detail this overall transportation task contextually can include: • Putting enough Solar Power Satellites into GEO to cleanly electrically power the energy hungry high tech civilization now rapidly expanding worldwide, saving petrochemicals • Putting massspectrometer type total recycling plants into GEO to process the toxic materials produced by industry worldwide, and ability to lift those waste materials up for processing and bring the clean materials back down • Building large scale spaceports in GEO and to lift the components for the immense spacecraft up to them for commerce to the Moon and other places in the Solar System • Building a few Stanford Torus Space Settlements in GEO, along with enough sawdust reinforced water ice to provide their passive shielding into GEO for R&D of such cities
Transportation energy is one key to success: the actual energy given to payload by lifting it up from the ground and put into GEO is only 15.7 kWh/kg, $1.57 per kg at $0.10 per kWh • Note that this is a little less than the energy given to achieve escape velocity, 17.4 kWh/kg • But also using energy to support the payload while it is slowly traversing up the gravitational field in between, can add a huge amount to the total energy cost for the lift • The delivery energy cost to GEO could be greatly reduced by using a transportation structure all along the way so as to support the payload while it is being lifted
The transportation structure itself can be configured to distribute the transportation energy along itself to the payload all along the way • Let’s explore how perhaps payload can be lifted … • by attaching to part of the structure that continuously circulates between the transportation terminals • by tapping into the momentum of rapidly moving upward bound electric armature mass passing the payload carrying vehicles, overall a kind of synchronous electrical motor • by higher velocity mass bouncing off its base like a fountain • by tapping wave motion energy propagating along the structure
The means of support of a transportation structure control its shape and the options for distributing energy along the structure. Two ways to support a transportation structure bridging planetary surface and geosynchronous orbit include: • By an anchored tether being swung around by the planet’s daily rotation, supported by the centripetal force on the tethered mass beyond GEO • By an eccentrically shaped hoop around the planet, its internal mass moving around sufficiently faster than orbital transfer velocity to generate distributed outward centripetal force to balance the weight of the non rotating part of the hoop with its live loads
Payload can be lifted and lowered by attaching to part of a structure that continuously circulates between the transportation terminals
QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture.
By summing section weights, one can estimate that a 1300 kg/m3 tether material with a strength above 80 GPa is adequate for a linear tether through GEO
QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture.
A passively shielded lift version for personnel and other radiationintolerant payload could use a relatively heavy cargo lift container attached to the tether ribbon, utilizing several feet thickness of sawdustreinforced water ice • This would minimize environmental damage in catastrophic case of the container falling into the atmosphere. • The significant added shielding mass would reduce the overall throughput of payload. • It would also require bidirectional movement of the tether loop, along with starting and stopping the tether belt when the shielded cargo container arrives at ground and GEO terminals.
Another basic way for distributing transportation energy along itself is by providing paths for high velocity circulating mass streams along the structure, that electromagnetically share part of their upward moving momentum to lift vehicles riding the structure. • Along linear anchored counterweight supported tether structures. • Along planetary loop structures, where circulating mass also uses its outward centrifugal force of the loop, to balance the weight of the stationary part of the structure. • Along fountain type supportive or lifting structures.
Payload can be lifted by tapping into the momentum of rapidly moving upward bound mass passing the payload carrying vehicles along a linear tether structure High velocity upward moving armatures inductively drag vehicles upward to space, or lower them gently back to earth
QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture.
Payload can be lifted by tapping into the momentum of electric motor armature mass continuously moving at 10’s of km/s along inductive maglev tracks embedded in the motor stator along a hoop structure around a planetary body • • •
Electric motor armatures distribute lift energy to vehicles Armatures distribute servoposition energy to the structure Armatures generate outward centripetal force to balance weight of structure and vehicles
QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture.
Schematic of fountainlike support or lift where upward high velocity mass bounces off vehicle, imparting upward reaction vehicle lift force
QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture.
Principle of energy transmission by wave motion, by electromechanical vibration of the tether at one end, and extraction of wave motion energy along the way to lift cargo
Summary Very long space transportation structures do have potential for distributing electromechanical transportation energy along themselves • As a circulating conveyor belt tether • As a linear track structure with sliding high velocity mass streams to drag vehicles upward • As a hoop track structure around a planet, the electric motor’s enclosed high velocity armature circulating mass both lifts its vehicles, and the outward centrifugal force distributes structural weight support • As a guide for wave motion along the structure Jim Cline www.kestsgeo.com www.escalatorhi.com
Although the transmission of energy across long distances is generally considered the domain of electrical conductors and electromagnetic radiation beams, in the field of very long space transportation structures it may be worthwhile to revisit electromechanical energy transmission distribution means. The form of delivery of transportation energy along a long transportation structure needs to be chosen in overall context with its application, such as the job of cleanly enabling a high technology worldwide civilization through adequate access to GEO space resources, all done carefully and quickly enough before our bourgeoning haphazard civilization can destroy itself.
A chosen transportation system has to be up to doing the overall job providing for civilization’s near future needs: in more detail this overall transportation task contextually can include: • Putting enough Solar Power Satellites into GEO to cleanly electrically power the energy hungry high tech civilization now rapidly expanding worldwide, saving petrochemicals • Putting massspectrometer type total recycling plants into GEO to process the toxic materials produced by industry worldwide, and ability to lift those waste materials up for processing and bring the clean materials back down • Building large scale spaceports in GEO and to lift the components for the immense spacecraft up to them for commerce to the Moon and other places in the Solar System • Building a few Stanford Torus Space Settlements in GEO, along with enough sawdust reinforced water ice to provide their passive shielding into GEO for R&D of such cities
Transportation energy is one key to success: the actual energy given to payload by lifting it up from the ground and put into GEO is only 15.7 kWh/kg, $1.57 per kg at $0.10 per kWh • Note that this is a little less than the energy given to achieve escape velocity, 17.4 kWh/kg • But also using energy to support the payload while it is slowly traversing up the gravitational field in between, can add a huge amount to the total energy cost for the lift • The delivery energy cost to GEO could be greatly reduced by using a transportation structure all along the way so as to support the payload while it is being lifted
The transportation structure itself can be configured to distribute the transportation energy along itself to the payload all along the way • Let’s explore how perhaps payload can be lifted … • by attaching to part of the structure that continuously circulates between the transportation terminals • by tapping into the momentum of rapidly moving upward bound electric armature mass passing the payload carrying vehicles, overall a kind of synchronous electrical motor • by higher velocity mass bouncing off its base like a fountain • by tapping wave motion energy propagating along the structure
The means of support of a transportation structure control its shape and the options for distributing energy along the structure. Two ways to support a transportation structure bridging planetary surface and geosynchronous orbit include: • By an anchored tether being swung around by the planet’s daily rotation, supported by the centripetal force on the tethered mass beyond GEO • By an eccentrically shaped hoop around the planet, its internal mass moving around sufficiently faster than orbital transfer velocity to generate distributed outward centripetal force to balance the weight of the non rotating part of the hoop with its live loads
Payload can be lifted and lowered by attaching to part of a structure that continuously circulates between the transportation terminals
QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture.
By summing section weights, one can estimate that a 1300 kg/m3 tether material with a strength above 80 GPa is adequate for a linear tether through GEO
QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture.
A passively shielded lift version for personnel and other radiationintolerant payload could use a relatively heavy cargo lift container attached to the tether ribbon, utilizing several feet thickness of sawdustreinforced water ice • This would minimize environmental damage in catastrophic case of the container falling into the atmosphere. • The significant added shielding mass would reduce the overall throughput of payload. • It would also require bidirectional movement of the tether loop, along with starting and stopping the tether belt when the shielded cargo container arrives at ground and GEO terminals.
Another basic way for distributing transportation energy along itself is by providing paths for high velocity circulating mass streams along the structure, that electromagnetically share part of their upward moving momentum to lift vehicles riding the structure. • Along linear anchored counterweight supported tether structures. • Along planetary loop structures, where circulating mass also uses its outward centrifugal force of the loop, to balance the weight of the stationary part of the structure. • Along fountain type supportive or lifting structures.
Payload can be lifted by tapping into the momentum of rapidly moving upward bound mass passing the payload carrying vehicles along a linear tether structure High velocity upward moving armatures inductively drag vehicles upward to space, or lower them gently back to earth
QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture.
Payload can be lifted by tapping into the momentum of electric motor armature mass continuously moving at 10’s of km/s along inductive maglev tracks embedded in the motor stator along a hoop structure around a planetary body • • •
Electric motor armatures distribute lift energy to vehicles Armatures distribute servoposition energy to the structure Armatures generate outward centripetal force to balance weight of structure and vehicles
QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture.
Schematic of fountainlike support or lift where upward high velocity mass bounces off vehicle, imparting upward reaction vehicle lift force
QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture.
Principle of energy transmission by wave motion, by electromechanical vibration of the tether at one end, and extraction of wave motion energy along the way to lift cargo
Summary Very long space transportation structures do have potential for distributing electromechanical transportation energy along themselves • As a circulating conveyor belt tether • As a linear track structure with sliding high velocity mass streams to drag vehicles upward • As a hoop track structure around a planet, the electric motor’s enclosed high velocity armature circulating mass both lifts its vehicles, and the outward centrifugal force distributes structural weight support • As a guide for wave motion along the structure Jim Cline www.kestsgeo.com www.escalatorhi.com
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