Analysis of atmospheric circulation for physicochemical regenerative environment control and life support system in space station

This paper deals with the establishment the simulation analysis of the atmospheric circulation of physicochemical regenerative environment control and life support system (PRLSS) in the space station, and the main objective is to assess the characteristics of the material flow accounting of PRLSS for medium-and long-term space missions. Firstly, a dynamic model for this system is established. Then, the simulation to focus on PRLSS is conducted. The simulation focuses on oxygen generation and carbon dioxide removal, so the complicated model of the closed loop system contains air environment model, metabolic model of astronaut, electrolyte model, air revitalization model, chamber model and pressure control algorithms for gas supply, electrolytic electric current and carbon dioxide removal. The simulation results show that the oxygen production and the removal capacity for carbon dioxide can be adapted to the medium-term mission that three crewmembers work together in space station, and the involved subsystems can interact closely.