<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The article was inspired by information in the literature regarding damage to medium-pressure diving hoses, which, as a result of the crystallisation of material on their inner surface and the detachment of particles, caused significant interference with the output of the pressure regulator. A dangerous consequent ‘clogging’ of the airflow in stage II of the breathing apparatus and an increase in the effort in the diver’s lungs to overcome the increased breathing resistance resulted. This problem was investigated in the paper. Nozzles with reduced diameters were fabricated to simulate the deterioration of the automaton conditions. A suitably selected regulator from a domestic manufacturer’s was used for the tests. A series of measurements was carried out in a breathing simulator for the established experimental conditions specified in the standard PN-EN 250:2014. Following the test, the results obtained were analysed and interpreted based on statistical description methods.</p>
</abstract>

The article was inspired by information in the literature regarding damage to medium-pressure diving hoses, which, as a result of the crystallisation of material on their inner surface and the detachment of particles, caused significant interference with the output of the pressure regulator. A dangerous consequent ‘clogging’ of the airflow in stage II of the breathing apparatus and an increase in the effort in the diver’s lungs to overcome the increased breathing resistance resulted. This problem was investigated in the paper. Nozzles with reduced diameters were fabricated to simulate the deterioration of the automaton conditions. A suitably selected regulator from a domestic manufacturer’s was used for the tests. A series of measurements was carried out in a breathing simulator for the established experimental conditions specified in the standard PN-EN 250:2014. Following the test, the results obtained were analysed and interpreted based on statistical description methods.

Evaluation of the effect of nozzle diameter on the breathing performance of a diving breathing apparatus

Department of Underwater Works Technology Naval Academy of Gdynia

Polish Hyperbaric Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The article was inspired by information in the literature regarding damage to medium-pressure diving hoses, which, as a result of the crystallisation of...

Evaluation of the effect of nozzle diameter on the breathing performance of a diving breathing apparatus

Published Online: Nov 10, 2023

Page range: 39 - 60

Received: Feb 09, 2022

Accepted: Mar 14, 2022

DOI: https://doi.org/10.2478/phr-2022-0015

Keywords
mechanical engineering, diving technology operation, diving breathing equipment

© 2022 Mateusz Banach et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Evaluation of the effect of nozzle diameter on the breathing performance of a diving breathing apparatus

Published Online: Nov 10, 2023

Page range: 39 - 60

Received: Feb 09, 2022

Accepted: Mar 14, 2022

DOI: https://doi.org/10.2478/phr-2022-0015

Keywordsmechanical engineering, diving technology operation, diving breathing equipment

© 2022 Mateusz Banach et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
mechanical engineering, diving technology operation, diving breathing equipment