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Project X pedition Final slides outline for Orbital Transfer Vehicle Propulsion

Project X pedition Final slides outline for Orbital Transfer Vehicle Propulsion. Week 11 Presentation Thursday, March 26, 2009. 1. Propulsion on the Orbital Transfer Vehicle. tank. Xenon Hall Thruster from Busek One low-power thruster for X-prize missions

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Project X pedition Final slides outline for Orbital Transfer Vehicle Propulsion

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  1. Project XpeditionFinal slides outline for Orbital Transfer Vehicle Propulsion Week 11 Presentation Thursday, March 26, 2009 Brad Appel Propulsion Group 1

  2. Propulsion on the Orbital Transfer Vehicle tank • Xenon Hall Thruster from Busek • One low-power thruster • for X-prize missions • Cluster of five high-power • thrusters for arbitrary • payload • Performance Specs: feed system thruster Brad Appel Propulsion Group 2

  3. From PCDU S/C Communication Backup Slide 1:Electric Propulsion System Setup PPU 1 T XENON TANK 2 11 S 3 P 5 4 6 7 0.2 m P T 8 HALL THRUSTER 9 10 Power / Intercomm Xenon System Thermal System • No redundancies, no integration costs Brad Appel Propulsion Group 3

  4. Backup Slide 2: Xenon Thermal Analysis • Maximize storage pressure for volume • efficiency (~ 150 bar) • Maintain tank temperature for gaseous Xenon phase: •  Balance heat due to radiation and pressure drop • with a resistance heater • Curve data from National Institute of Standards and Technology Supercritical Storage Region Liquid Gas Allowed temperature path of propellant Temperature (K) Brad Appel Propulsion Group 4

  5. Outline for Backup Slides Brad Appel Propulsion Group • Slide 1: Propulsion System Setup • Diagram and Parts list • Slide 2: Xenon Storage and Thermal Control • Phase diagram, description of heating system • Slide 3: Explanation of Sizing Process • Block diagram summarizing code algorithm • Slide 4: Miscellaneous Issues • Lifetime limit because of electrode erosion • Spacecraft charging and communication interference 5

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