| タイトル | Lightweight Radiators Being Developed or Advanced Stirling Radioisotope Power Systems |
| 本文（外部サイト） | http://hdl.handle.net/2060/20050195879 |
| 著者（英） | Tew, Roy C.; Juhasz, Albert J.; Thieme, Lanny G. |
| 著者所属（英） | NASA Glenn Research Center |
| 発行日 | 2001-03-01 |
| 言語 | eng |
| 内容記述 | The thermodynamic heat-to-electric power conversion efficiency of Stirling systems is 3 to 5 times higher than that of thermoelectric converters. Hence for unmanned deep space probes, Stirling advanced radioisotope power systems (ARPS) could deliver up to 5 times as much power as radioisotope thermoelectric generators for the same amount of radioisotope, or they could require one-third to one-fifth as much isotope inventory for the same power output. However, Stirling power systems reject unconverted heat at much lower temperatures than radioisotope thermoelectric generators. Normally, this requires larger and heavier heat-rejection subsystems because of the greater radiator areas, which are proportional to the first power of the heat rejected and the fourth power of the absolute heat-rejection temperature, as specified by the Stefan-Boltzmann radiation heat transfer law. The development of directly coupled disk radiators using very high conductivity encapsulated thermopyrolitic graphite materials represents a significant advance in Stirling ARPS space heat-rejection subsystem technology. A conceptual Stirling ARPS with two engines coupled to a radioisotope general-purpose heat source (GPHS) is shown in the illustration. |
| NASA分類 | Energy Production and Conversion |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/85656 |
