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Ryan Scott Week 5: February 15th, 2007

Ryan Scott Week 5: February 15th, 2007. Power Group Leader TC, TV, dE, aM, dM, aM, CS1, CS2, CS3 *WITH UPDATED NUMBERS AS OF 2/16/2007*. TV Power Distribution. Spring: Light weight (due to lack of gravity) Self sufficient No power required Motor: Movement on demand

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Ryan Scott Week 5: February 15th, 2007

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  1. Ryan ScottWeek 5: February 15th, 2007 Power Group LeaderTC, TV, dE, aM, dM, aM, CS1, CS2, CS3 *WITH UPDATED NUMBERS AS OF 2/16/2007* Scott 1

  2. TV Power Distribution • Spring: • Light weight (due to lack of gravity) • Self sufficient • No power required • Motor: • Movement on demand • Used to pull structure together • Most complicated • Bunching: • Least complicated • Possible danger of smashing wire • No power Required • Power (example): • 150 kW • Mass (example): • 10 MT (cu) • 3.2 MT (al) • Volume (example): • Wire Area: 2966 mm^2 x 500 m • Spool: 4.0946 m^3 (1.6145 m diameter x 2 m) Scott 2

  3. CS2, CS3 • Power: • 16.75 kW • Mass: • 185.4 kg (Array, Batteries, Wires, Power Converters) • Volume: • 189.81 m^2 by 0.127 m • GaInP Triple Junction Thin Film Solar Cells: • Light weight • Radiation resistance • High output per cell • Double Solar Array Design: • Damage tolerant • Higher sun ray collection if motor or rotation malfunction • Battery Backup (2 hours): • Celestial body blocking sunlight • Rotational or motor Error • Alien Intervention Scott 3

  4. Back Up Slides Scott 4

  5. An = pi/4d^2 = 0.0126677166mm^2X92^((36-n)/(19.5)) current = voltage / resistance conductor size 0 AWG area 53.475 mm^2 diameter 9.530 mm (1) DC-resistance 0.000329 Ohm/m weight 475.394 kg/km (Cu) weight 144.383 kg/km (Al) Scott 5

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  7. Retractable Power Cord on TV Scott 7

  8. CS2, CS3 123.38 kg (Panels) + 4kg (wires/converters) + 58 kg (Batteries) Scott 8

  9. Resourses • Dr. Damon F. Landau.  “Strategies for the Substained Human Exploration of Mars”  Thesis Submitted to the Faculty of Purdue University, Dec. 2006. • Wiley J. Larson and Linda K. Pranke.  “Human Spaceflight”  McGraw-Hill Higher Education, 2006. • (2006) http://www.nasa.gov/pdf/167120main_Elements.pdf. January 20, 2007 • (2006) http://www.space.gc.ca/asc/eng/iss/facts.asp. January 18, 2007 • (2006) http://powerweb.grc.nasa.gov/pvsee/publications/wcpec2/cells4mars.html. January 18, 2007 • Krishna C. Mandal (2005), http://sbir.gsfc.nasa.gov/SBIR/abstracts/03/sttr/phase2/STTR-03-2-T3.02-9919.html. Januray 19, 2007 Scott 9

  10. Resourses (continued) • Kenneth M. Edmondson, David E. Joslin, Chris M. Fetzer, Richard R. King, Nasser H. Karam. http://trs-new.jpl.nasa.gov/dspace/bitstream/2014/37746/1/05-2732.pdf. January 17, 2007 • Christopher T. Russell. http://discovery.larc.nasa.gov/PDF_FILES/1_Flight_System_Overview.pdf. January 17, 2007 • Spectrolab inc. http://www.spectrolab.com/DataSheets/TNJCell/utj3.pdf. January 15, 2007 • Nasa. http://search.nasa.gov/search/search?q=GaAs+triple-junction&output=xml_no_dtd&sort=dateADALAd1&site=nasa_collection&ie=UTF-8&client=nasa_production&oe=UTF-8&proxystylesheet=nasa_production. January 21, 2007 Scott 10

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