METHOD AND APPARATUS FOR DETERMINING AIR EXCHANGE RATE IN A ROOM OR A BUILDING Russian patent published in 2021 - IPC F24F11/00 

FIELD: measurement technology.

SUBSTANCE: present invention relates to a method and a device for determining air exchange rate in space. Method of determining ACH air exchange rate in space includes steps, at which for at least two consecutive time periods D_k corresponding to different charges q_k of the predetermined gas used in space, measurement operation is carried out, allowing to determine the concentration C_ik gas inside the space with similar time intervals, and the concentration C_ek gas space is determined with similar time intervals. Value of the air exchange rate ACH in space is determined by providing convergence: on the one hand, the diffusion model that expresses a temporary change in the concentration of C_ik gas inside the space as a function of the concentration C_ek gas out of space, and the physical parameters of space, of which parameters ACH air exchange velocity in the space can be calculated, and on the other hand, the measured change C_ik(t) at a concentration of C_ik gas inside the space as a function of time.

EFFECT: technical result is faster determination of air exchange rate in space.

22 cl, 3 tbl, 6 dwg