Study of steam, helium and supercritical CO2 turbine power generations in prototype fusion power reactor
✍ Scribed by Shintaro Ishiyama; Yasushi Muto; Yasuyoshi Kato; Satoshi Nishio; Takumi Hayashi; Yasunobu Nomoto
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 759 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0149-1970
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✦ Synopsis
Power generation systems such as steam turbine cycle, helium turbine cycle and supercritical CO 2 (S-CO 2 ) turbine cycle are examined for the prototype nuclear fusion reactor. Their achievable cycle thermal efficiencies are revealed to be 40%, 34% and 42% levels for the heat source outlet coolant temperature of 480 C, respectively, if no other restriction is imposed. In the current technology, however, low temperature divertor heat source is included. In this actual case, the steam turbine system and the S-CO 2 turbine system were compared in the light of cycle efficiency and plant cost. The values of cycle efficiency were 37.7% and 36.4% for the steam cycle and S-CO 2 cycle, respectively. The construction cost was estimated by means of component volume. The volume became 16,590 m 3 and 7240 m 3 for the steam turbine system and S-CO 2 turbine system, respectively. In addition, separation of permeated tritium from the coolant is much easier in S-CO 2 than in H 2 O. Therefore, the S-CO 2 turbine system is recommended to the fusion reactor system than the steam turbine system.