Analysis and calculation of indoor space diffusion oxygen supply in plateau area

Based on the air volume balance equation and oxygen volume balance equation, this paper deduces and analyses the indoor oxygen concentration change equation, and calculates the equation with a case. The results show that when the target indoor oxygen concentration is determined, the change rate of indoor oxygen concentration is mainly determined by the outdoor air volume. When the outdoor air volume is small, the required steady state oxygen supply decreases, but the time from the initial oxygen supply concentration to the target indoor oxygen concentration increases, which is difficult to meet the room use requirements. Therefore, it is proposed to revise the steady state oxygen supply in the early stage of oxygen supply and increase the oxygen supply appropriately to achieve the target indoor oxygen concentration within the specified time. Through the scientific calculation software, the required oxygen supply correction coefficient is obtained, which can be used for the design and calculation of the indoor space diffusion oxygen supply in plateau area.