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Tradeoff Study of High Altitude Solar Reflector Concepts
Technical Paper
2017-01-2143
ISSN: 0148-7191, e-ISSN: 2688-3627
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Abstract
A direct solution to Global Warming would be to reflect a part of sunlight back into Space. A system tradeoff study is being developed with three of the concepts that are being evaluated as long-endurance high-altitude reflectors. The first concept is a high aspect ratio solar powered flying wing towing reflector sheets. This concept is named “Flying Carpet”. Second is a centrifugally stretched high altitude solar reflector (CSHASR). The CSHASR has 4 rotors made of reflector sheets with a hub stretching to 60 percent of the radius, held together by an ultralight quad-rotor structure. Each rotor is powered by a solar-electric motor. A variation on this concept, forced by nighttime descent rate concerns, is powered by tip-mounted solar panels and propellers with some battery storage augmenting rotational inertia as well as energy storage. The third concept is an Aerostatically Balanced Reflector (ABR) sheet, held up by hydrogen balloons. A set of co-axial counter-rotating rotors provides trim, directional control and migration with the summer Sun. This concept also offers the ability to hold up the reflector at arbitrary orientations to achieve maximum reflection, normal to the slanted rays of the polar summer sun. This paper presents concept evaluation and comparisons, explaining the concepts and high-level features of each concept in this extreme and little-explored regime of rotorcraft aeromechanics as well as aerostatics.
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Komerath, N., Shukla, D., Hariharan, S., Patel, S. et al., "Tradeoff Study of High Altitude Solar Reflector Concepts," SAE Technical Paper 2017-01-2143, 2017, https://doi.org/10.4271/2017-01-2143.Data Sets - Support Documents
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References
- Stocker , T.F. et al Climate Change 2013: The Physical Science Basis IPCC Working Group WG1 Contribution to The Assessment Report AR5 of the Intergovernmental Panel on Climate Change Cambridge University Press 2013 1552
- Trends in World Military Expenditure, 2016 Stockholm International Peace Research Institute 24 April 2017
- Bolonkin , A. Utilization of wind energy at high altitude 2nd International Energy Conversion Engineering Conference 2004
- Ahmed , M. , Hably , A. , Bacha , S. High altitude wind power systems: A survey on flexible power kites Proceedings of the IEEE XXth International Conference on Electrical Machines (ICEM) 2085 2091 2012
- Canale , M. , Fagiano , L. , Milanese , M. High altitude wind energy generation using controlled power kites IEEE Transactions on Control Systems Technology 18 2 279 283 2010
- Perković , L. , Silva , P. , Ban , M. , Kranjević , N. , Duić , Neven Harvesting high altitude wind energy for power production: The concept based on Magnus' effect Applied Energy 101 151 160 2013
- Baldock , N. , Mokhtarzadeh-Dehghan , M.R. A study of solar-powered, high-altitude unmanned aerial vehicles Aircraft Engineering and Aerospace Technology 78 3 187 193 2006
- Dalamagkidis , K. Autonomous vertical autorotation for unmanned helicopters 2009
- Wurst , S.G Bartlett R.H. , Wright , D.S. High altitude, long duration surveillance system US Patent5518205 May 1996
- Martin , P. Rotor blade airfoil design for high-altitude, long-endurance VTOL UAVs high altitude rotor blade design
- Loth , E. , Steele , A. , Ichter , B. , Selig , M. , Moriarty , P. Segmented ultralight pre-aligned rotor for extreme-scale wind turbines 50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2012
- Patil , M.J. , Hodges , D.H. , Cesnik , C. Limit-cycle oscillations in high-aspect-ratio wings Journal of fluids and structures 15 1 107 132 2001
- Phelps , A.E. , Barnes , D.R. , Norris , E.G. , Rock , E.F , Wallace , E. Ultralight coaxial rotor aircraft US Patent 7198223 April 2007
- Romeo , G. , Frulla , G. , Cestino , E. Design of a high-altitude long-endurance solar-powered unmanned air vehicle for multi-payload and operations Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 221 2 199 216 2007
- Shen , J. , Chopra , I. , Johnson , W. Performance of swashplateless ultralight helicopter rotor with trailing-edge flaps for primary flight control DTIC Document 2003
- Johnson , L. Solar Sail Propulsion NASA Marshall Flight Center 2012
- Salama , M. , White , C. , & Leland , R. 2003 Ground demonstration of a spinning solar sail deployment concept Journal of spacecraft and rockets 40 1 9 14
- Power-to-weight Ratio Wikipedia Wikimedia Foundation 01 June 2017 04 July 2017 https://en.wikipedia.org/wiki/Power-to-weight_ratio#Electric_motors.2FElectromotive_generators
- O’Neill , Mark et al. Stretched lens array squarerigger (SLASR): A unique high-power solar array for exploration missions Acta Astronautica 59 1 2006 157 165
- Lithium-ion Battery Wikipedia Wikimedia Foundation 01 June 2017 04 July 2017