Personalized ventilation solutions for reducing CO2 levels in the crew quarters of the International Space Station

The present paper studies the possibility of personalized ventilation (PV) systems to improve air quality in breathing zone astronauts resting crew quarters aboard International Space Station. In absence gravity CO2 accumulates pockets near astronaut's head, potentially leading symptoms intoxication. addition a PV system aimed at an during sleep could provide supply fresh directly face and reduce risks Experimental measurements diffuser velocity fields were performed experimental setup results used validate numerical solution for case connected already existing general quarters. CFD models order reproduce conditions microgravity. Two configurations studied, first with position front human occupant second was positioned laterally, both being zone. compared without PV. Results indicate that lateral is more viable than frontal providing reduction overall levels also leads 8% volume inhaled over course each breath having potential longer periods time.