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Concept for a Cascaded Multi-Mission Radioisotope Thermoelectric Generator
Ist Teil von
2019 European Space Power Conference (ESPC), 2019, p.1-5
Ort / Verlag
IEEE
Erscheinungsjahr
2019
Link zum Volltext
Quelle
IEEE/IET Electronic Library (IEL)
Beschreibungen/Notizen
A multi-mission radioisotope thermoelectric generator (MMRTG) powers Curiosity, the National Aeronautics and Space Administration (NASA) Mars Science Laboratory rover on Mars. Consideration is being given to the feasibility of integrating a second thermoelectric circuit of bismuth telluride (Bi 2 Te 3 ) into the MMRTG design in order to improve the beginning-of-life (BOL) and end-of-design life (EODL) performance. The maturity of Bi 2 Te 3 and the design flexibility of a cascaded approach enable a low-risk system upgrade that is predicted to enhance the MMRTG's performance. Initial studies indicate that the integration of a second stage Bi 2 Te 3 thermoelectric circuit could potentially provide an approximate 20% increase in power output at BOL and EODL (with EODL defined as 17 years from fueling). This paper presents an overview of the results of the study.