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Optimizing the Efficiency of Thermal to Electrical Power Conversion in Static Heat Converter for Radioisotope Heat Sources

Mazandarani, Alireza | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57453 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Vosoughi, Naser
  7. Abstract:
  8. Nowadays, due to various advances in the space industry, nuclear generators are widely used to provide the electrical power needed by satellites, spacecrafts and other instruments used in space; So that there is practically no other way than the nuclear industry to produce the required power in some missions; Therefore, it is vital to design nuclear mechanism-based electric power generators. Radioisotope Thermoelectric Generator (RTG) is one of the best and most widely used of these generators. These generators consist of 3 main components: heat source, thermoelectric converter and body. The source of thermal power used is General-purpose heat source (GPHS), which produces thermal power at 250 watts using fuel 238PuO2. The thermoelectric arrays used in these generators convert thermal power into electrical power. The power conversion efficiency (PCE) is low in thermoelectric systems; Therefore, more sources of thermal power should be used to produce a certain amount of electric power. This has increased the weight of the generator, which is not good due to space conditions. This study has designed 3 new examples of thermoelectric unicouples and it was observed that this efficiency can be increased and optimized. The use of segmented thermoelectric unicouples and a change in the geometry and arrangement of unicouples as thermoelectric arrays, will be actions that are carried out during this research
  9. Keywords:
  10. Thermoelectric ; Heating Power ; General Purpose Heat Source (GPHS) ; Efficiency ; Electrical Power ; Radioisotope Thermoelectric Generator (RTG) ; Heat Exchangers

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