Analysis on characteristics of CO₂ removal system of multi-cabin human spacecraft

Air environment of human spacecraft with multi-cabin is usually controlled by one core cabin through inter-cabin ventilation. An integrated simulation model of CO₂ removal system of human spacecraft with multi-cabin was developed with Ecosimpro, including cabin sub module, crew sub module, CO₂ removal sub module, and inter-cabin ventilation sub module. Using this simulation model, the characteristics of CO₂ removal system were analyzed. According to the results, when crew number in cabins without CO₂ removal equipment is up to 6 and air flux into CO₂ removal equipment is maintained at 0.007 2 kg/s, CO₂ partial pressure of cabins without CO₂ removal equipment is beyond upper limit of 700 Pa. In that case, CO₂ partial pressure could not be improved effectively by increasing inter-cabin ventilation flux. However, when air flux into CO₂ removal equipment is increased from 0.007 2 kg/s to 0.011 3 kg/s, CO₂ partial pressure of cabin without CO₂ removal system is reduced below 700 Pa. The work is helpful to accelerate the process of design and improvement of air environment control system of human spacecraft.