Physics – Optics
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990usra.proc...89.&link_type=abstract
In USRA, Proceedings of the 6th Annual Summer Conference: NASA/USRA University Advanced Design Program p 89-92 (SEE N91-18121 10
Physics
Optics
Farm Crops, Fiber Optics, Fresnel Lenses, Greenhouses, Habitats, Kevlar (Trademark), Mars (Planet), Solar Collectors, Space Colonies, Stiffness, Sunlight, Systems Engineering, Cosmic Rays, Illuminating, Modules, Position (Location), Waveguides
Scientific paper
The design of a greenhouse that will be a component of a long-term habitat on Mars is presented. The greenhouse will be the primary food source for people stationed on Mars. The food will be grown in three identical underground modules, pressurized at 1 atm to allow a shirt-sleeve environment within the greenhouse. The underground location will support the structure, moderate the large environmental variations on the surface, and protect the crops from cosmic radiation. The design effort is concentrated on the outer structure and the lighting system for the greenhouse. The structure is inflatable and made of a Kevlar 49/Epoxy composite and a pipe-arched system that is corrugated to increase stiffness. This composite is pliable in an uncured state, which allows it to be efficiently packaged for transport. The lighting system consists of several flat-plate fiber optic solar collectors with dual-axis tracking systems that will continually track the sun. This design is modeled after the Himawari collector, which was designed by Dr. Kei Mori and is currently in use in Japan. The light will pass through Fresnel lenses that filter out undesirable wavelengths and send the light into the greenhouses by way of fiber optic cables. When the light arrives at the greenhouse, it is dispersed to the plants via a waveguide and diffuser system.
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