CO<sub>2</sub>与He动力循环比较

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CO₂与He动力循环比较

1. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China;
2. China Nuclear Power Technology Research Institute, Shenzhen, Guangdong, 518026, China

摘要: 布雷顿循环是第4代核反应堆动力循环的关键技术。通过对CO₂布雷顿循环进行系统分析,并与目前核能转换系统中研究得最广泛的He布雷顿循环进行比较。结果表明:在相同功率下,由于单位质量的CO₂工质吸收的热量较少,导致其循环质量流量很大;但是,由于CO₂密度较大,其体积流量V反而比He循环小;在较低温度(650℃)下,布雷顿循环的效率也能达到较高水平,同时还可以减小换热及做功部件的体积。
- CO₂ /
- 布雷顿循环 /
- 核电厂
Abstract: Brayton cycle is the key technology for the fourth-generation nuclear reactor power cycle.This paper analyzed the carbon dioxide power cycle,and compared it with the most widely studied helium Brayton cycle.The result demonstrates that the unit mass of CO₂ absorbing less heat than Helium,resulting in larger cycle mass flow rate than Helium cycle under the same power;however,higher density of CO₂ makes smaller cycle volume flow rate.Because of the special physical properties of carbon dioxide,the CO₂ Brayton cycle,which can reach a higher level of efficiency at a lower temperature（650℃） and reduce the volume of heat exchanger and turbo machinery,has a great potential.
- Carbon dioxide /
- Brayton cycle /
- Nuclear power plant