ABSTRACT
The aim of the work was to develop and verify some mathematical ventilation models for the semi-closed-circuit rebreather and generalize the presented calculation models to other hyperbaric objects, e.g., hyperbaric chambers, submarines, and those used in mining excavation. In most situations in a submarine and mining excavation there exists slightly higher pressure as compared to atmospheric pressure, but for the purposes of simplification, these facilities will be classified as normobaric. The mathematical modeling presented here enables combining the micro and macro elements of the hyperbaric and normobaric technique. The developed models are of analytical character. Therefore, they have physical interpretation. Because of this, the semi-analytical and analytic models were not searched for. For the sake of the analyzed phenomena character, the statistic models of phenomena were not explored either.
The result of the research carried out and described here is the development and verification of the approach to modeling of the ventilation processes in semi-closed and closed breathing gas circulation systems operated in normobaric conditions and under increased pressure.
