TY - JOUR
TI - Characteristics and optimization of SCO2 Brayton cycle system for high power sodium-cooled fast reactor on Mars
AU - Zhang Hao-Chun
AU - Liu Xiu-Ting
AU - Liu Jin
AU - Li Zeng-En
JN - Thermal Science
PY - 2021
VL - 25
IS - 6
SP - 4659
EP - 4666
PT - Article
AB - Mars is the target of deep space exploration. The first problem of landing on  Mars and building a satellite base is the energy source. For more than 50 kW  high power demand, space nuclear energy system has the advantages of high  output power, large energy density, small area, short working time and so  on. Super-critical CO2 Brayton cycle with sodium cooled fast reactor is the  most promising power solution because of the high energy conversion  efficiency. The thermodynamic model of super-critical CO2 Brayton cycle  system with sodium cooled fast reactor as the heat source has been  established. After the analysis of circulation process, the relationship  between temperature, pressure and enthalpy at working point has been  discussed, and the relationship of circulation efficiency has been deduced.  The real gas model is used to correct the thermophysical properties of  super-critical CO2. The thermal efficiency of the system is analyzed under  the typical working condition of Mars surface. What's more, the effects of  pressure ratio, compressor inlet temperature, turbine inlet temperature, and  the temperature ratio on the cycle efficiency are discussed to get the  optimal cycle characteristic and condition parameters.