Tenders are invited for Water-Vapour Electric Propulsion System (Hall Effect Thruster or Gridded Ion Engine) - Expro+ Objective: Develop and test a compact, integrated, low-power, water-vapour Electric Propulsion System for all on-station manoeuvres, including EOL disposal, on LEO micro-smallsats constellations.Description: Water propulsion systems are being developed for various applications. The main advantages of water electric propulsion are safe storability and cost reductions compared to Xenon or Krypton propellants. Water is freely available on Earth and can be found in solid state in various places in the solar system. Using water as a propellant does not require high-pressure storage. Handling is inherently safe. The concept of water propulsion extends beyond immediate applications in LEO satellites and is potentially useful in future exploration missions employing a simple form of In-Situ Resource Utilisation (ISRU). Several types of water Electric Propulsion are commercially available or under development, with the most mature being water-vapor Resistojets. These are simple thrusters but mainly employed on low delta-V missions or as RCS systems due to their limited performance (high thrust but low ISP). Water-fed Microwave Electric Thrusters (METs) and Water Electrolysis Propulsion (WEP) systems are under development but today remain at low maturity. Water electrolysis is also used in conventional chemical thrusters and various developments are ongoing in Europe to mature them including past and ongoing ESA-funded RD activities. This activity targets prototyping and performance verification of a water-vapor Hall Effect Thrusters (HET) or Gridded Ion Engines (GIE) electric propulsion system that incorporates thruster head, fluidics, and electronics. Water-vapor HETs and GIEs do not need an electrolyzer onboard the spacecraft, which signifies less mass, volume, and complexity penalties. The target performance include: - Thrust: up to 10mN - Power: up to 600W - Life: compatible with LEO micro-smallsats constellations. The activity encompasses the following tasks: - Requirements Definition - Design Definition and Justification - Breadboard Prototype and Testing including performance characterisation and endurance test.Read more Tender Link : https://esastar-publication-ext.sso.esa.int/ESATenderActions/filter/open
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