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NASA NTRS · 20150011441

Parametric System Model for a Stirling Radioisotope Generator

Schmitz, Paul C.
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Abstract

A Parametric System Model (PSM) was created in order to explore conceptual designs, the impact of component changes and power level on the performance of the Stirling Radioisotope Generator (SRG). Using the General Purpose Heat Source (GPHS approximately 250 Wth) modules as the thermal building block from which a SRG is conceptualized, trade studies are performed to understand the importance of individual component scaling on isotope usage. Mathematical relationships based on heat and power throughput, temperature, mass, and volume were developed for each of the required subsystems. The PSM uses these relationships to perform component- and system-level trades.

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Schmitz, Paul C.. 2015-03-01. Parametric System Model for a Stirling Radioisotope Generator. https://ntrs.nasa.gov/citations/20150011441

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