Raw Data for Influence of non-ideal gas characteristics on working fluid properties and thermal cycle of space nuclear power generation system

Space nuclear Closed Brayton Cycle (CBC) power generation system with Helium-xenon gas (HeeXe) as awork fluid has attracted much attention with the development of space technology. The appropriatethermophysical property model of HeeXe is the key to achieve high-precision simulation of CBC powergeneration system. The thermophysical property model based on virial coefficient was developed andproposed. It was compared with the ideal gas model to clarify the differences and non-ideal gas characteristics of HeeXe. The deviations of HeeXe thermophysical parameters, main cycle parameters underdifferent temperatures and pressures were compared numerically with these models. Based on non-idealgas properties, a thermodynamic model was developed to analyze the influence of non-ideal gas characteristics on the efficiency of a 3.0 MWth lithium-cold fast reactor power system. The results showedthat HeeXe physical parameters deviated from ideal gas characteristics significantly under the molarmass of more than 40 g/mol. Lower temperature (<500K) or higher pressure (>3.0 MPa) tends to makenon-ideal gas characteristics on thermophysical parameters more effective. The thermophysical propertymodel with non-ideal gas characteristics improves the system simulation accuracy about 4.91 %. Thiswork can be used as reference for the development, accurate simulation and assessment of space nuclearCBC power generation system.