Possibilities of Using Mobile Fans and the Parameters Conditioning the Effectiveness of Tactical Mechanical Ventilation

Aim: The aim of the article is to indicate the possible scope of application of mobile fans during the execution of rescue actions and identification of the parameters conditioning the effectiveness of using this type of units. Method Design: Mobile overpressure fans are a tool used during rescue operations mainly to remove hot gases and smoke, which accumulate in confined spaces covered by fire – primarily within the evacuation routes, but also in the rooms. In literature there are examples of other uses of the considered fans, e.g. to support the liquidation of fire hazards of free-standing objects (i.e. fires of cars or containers) and the rescue of trapped people in inaccessible spaces by supplying fresh air. This paper, which is based on literature review, is devoted to providing an approximation of the above applications. The effective use of mobile fans requires specialized theoretical and practical preparation. Therefore, the study also identified factors that may determine the successful implementation of the adopted tactical intent, which include in particular: the selection of appropriate openings (outlet and inlet), the selection of the gas exchange path and the proper positioning of a mobile fan. Conclusions: Literature analysis of the problem presented in this paper will be a fundamental point of reference for the research work carried out in subsequent stages related to the evaluation of the efficiency of mobile fans. As part of this work, large-scale tests will be carried out using appropriately designed and constructed test benches to evaluate the effectiveness of mobile units in real conditions. The knowledge gained in this way is intended to serve as material for further considerations on the creation of concepts of both subsequent methodologies and test stands required for their implemen- tation, enabling the verification of parameters characterizing the efficiency and reliability of mobile fans. Keywords: mobile positive pressure fans, tactical mechanical ventilation, rescue operations Type of article: review article