High rise building smoke control and extraction (3):Re-discussion on application of flow distribution method of equivalent circulation area to calculation of pressurized air supply

In the article Application of flow distribution method of equivalent circulation area to calculation of pressurized air supply, the author puts forward the back pressure problem existed in inner aisle in application of the flow distribution method of equivalent circulation area, which is also the principle problem existed in smoke control standards. This paper solves the back pressure problem of the inner aisle from the aspects of theory and strategy, derives the equivalent circulation area of different air passages and the calculation model of pressurized air supply rate, and carries out the demonstration calculation with an example.