NASA's Advanced Radioisotope Power Conversion Technology Development Status

NASA's Advanced Radioisotope Power Systems (ARPS) project is developing the next generation of radioisotope power conversion technologies that will enable future missions that have requirements that cannot be met by either photovoltaic systems or by current radioisotope power systems (RPSs). Requirements of advanced RPSs include high efficiency and high specific power (watts/kilogram) in order to meet future mission requirements with less radioisotope fuel and lower mass so that these systems can meet requirements for a variety of future space applications, including continual operation surface missions, outer-planetary missions, and solar probe. These advances would enable a factor of 2 to 4 decrease in the amount of fuel required to generate electrical power. Advanced RPS development goals also include long-life, reliability, and scalability. This paper provides an update on the contractual efforts under the Radioisotope Power Conversion Technology (RPCT) NASA Research Announcement (NRA) for research and development of Stirling, thermoelectric, and thermophotovoltaic power conversion technologies. The paper summarizes the current RPCT NRA efforts with a brief description of the effort, a status and/or summary of the contractor's key accomplishments, a discussion of upcoming plans, and a discussion of relevant system-level benefits and implications. The paper also provides a general discussion of the benefits from the development of these advanced power conversion technologies and the eventual payoffs to future missions (discussing system benefits due to overall improvements in efficiency, specific power, etc.).

[1]  Wayne A. Wong.  Advanced Radioisotope Power Conversion Technology Research and Development , 2004 .

[2]  Thermophotovoltaic Spectral Control , 2004 .

[3]  A. Schock,et al.  Effect of updated data base and improved analysis on performance of radioisotope thermophotovoltaic converter , 1996, IECEC 96. Proceedings of the 31st Intersociety Energy Conversion Engineering Conference.

[4]  Jeffrey G. Schreiber,et al.  Development of Advanced Stirling Radioisotope Generator for Space Exploration , 2007 .

[5]  Wayne A. Wong,et al.  An Overview and Status of NASA's Radioisotope Power Conversion Technology NRA , 2005 .

[6]  David J. Anderson.  NASA Radioisotope Power Conversion Technology NRA Overview , 2005 .

[7]  Gang Chen,et al.  Thermal conductivity and ballistic-phonon transport in the cross-plane direction of superlattices , 1998 .

[8]  C. B. Vining,et al.  SILICON-GERMANIUM: AN OVERVIEW OF RECENT DEVELOPMENTS , 1993 .

[9]  Gang Chen,et al.  Thermal conductivity modeling of periodic two-dimensional nanocomposites , 2004 .

[10]  Mounir B. Ibrahim,et al.  Assessing the performance of a microfabricated regenerator for Stirling space-power convertor , 2005 .

[11]  Michael G. Houts,et al.  Radioisotope-based Nuclear Power Strategy for Exploration Systems Development , 2006 .

[12]  George R. Schmidt,et al.  NASA’s Program for Radioisotope Power System Research and Development , 2005 .

[13]  Wayne A. Wong,et al.  Status of NASA's Advanced Radioisotope Power Conversion Technology Research and Development , 2006 .

[14]  J. Gary Wood,et al.  Advanced Stirling Convertor Update , 2006 .

[15]  Steven R. Oleson,et al.  Radioisotope electric propulsion missions utilizing a common spacecraft design , 2005 .

[16]  Jean-Pierre Fleurial,et al.  Thermal conductivity reduction in SiGe alloys by the addition of nanophase particles , 1995 .

[17]  Christopher J. Crowley,et al.  Thermophotovoltaic Converter Performance for Radioisotope Power Systems , 2005 .

[18]  Kyle Wilson,et al.  Advanced Stirling Convertor Phase II Achievements and Planned Phase III Efforts , 2006 .