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Updated: Aug 6, 2026

Normothermic Negative Pressure Ventilation Ex Situ Lung Perfusion: Evaluation of Lung Function and Metabolism
Published on: February 14, 2022
Aerodynamic effectiveness of positioning methods for conventional positive pressure ventilators operating in variable
Piotr Kaczmarzyk1,2, Rafał Noske3, Damian Bąk3
1Scientific and Research Centre for Fire Protection, National Research Institute, 05-420, Józefów, Poland. pkaczmarzyk@cnbop.pl.
Multiplying positive pressure ventilators enhances firefighting efficiency by reducing operation time and energy use. Proper positioning of these ventilators can significantly boost airflow and pressure within structures.
Area of Science:
- Fire Safety Engineering
- Mechanical Ventilation Systems
- Rescue Operations Technology
Background:
- Mechanical tactical ventilation is crucial for rescue and firefighting operations.
- Improving the efficiency of positive pressure ventilators can lead to better operational outcomes.
- Understanding optimal ventilator configuration is key to maximizing their effectiveness.
Purpose of the Study:
- To investigate the impact of multiplying positive pressure ventilators on operational efficiency.
- To determine the optimal positioning of multiple ventilators for enhanced performance.
- To analyze flow parameters and their dependence on ventilator settings during internal fire scenarios.
Main Methods:
- Conducted tests on conventional rotor ventilators (4.4 kW output).
- Evaluated ventilator positioning relative to doorways.
- Measured flow rate and static overpressure generated by the ventilation systems.
Main Results:
- Proper positioning of multiple ventilators increased facility airflow by up to 32%.
- Optimal setup resulted in a 50% increase in static overpressure.
- Analyzed flow parameters based on positive pressure ventilator settings.
Conclusions:
- Multiplying positive pressure ventilators improves operational time, execution, and energy consumption.
- Strategic ventilator placement is critical for maximizing airflow and pressure.
- Findings provide recommendations for rescue teams on optimizing ventilator settings for internal fires.
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