Performance test of PSA-type O₂ separator for efficient O₂ supply to room ventilation system combined with CO₂ adsorption module

High purity O₂ concentrated by the PSA-type O₂ separator was applied to a room ventilation system combined with CO₂ adsorption module to remove the indoor CO₂ for the indoor air quality. And then the room was occupied by several persons to breathe for the O₂ consumption and CO₂ generation. As a result, the indoor air quality was improved by the ventilation system combined with the O₂ supply and the CO₂ adsorption module. It was due to the fact that the CO₂ concentration was not steeply increased, but also even decreased and then the increasing rate of the O₂ concentration with the O₂ supply was simultaneously increased by the CO₂ removal despite the CO₂ generation and O₂ consumption with the four persons' breathing. As a representative result, in the case of supplying the high purity O₂ of 30 L/min under using the CO₂ adsorption module, the best performance with the highest increasing rate of O₂ concentration and the lowest increasing rate of CO₂ concentration was obtained among the various cases, and then the increasing rates of CO₂ radiation and O₂ concentration were -2.3 ppm/min and 33.3%/min, respectively.