Composition characteristics of gases separated continuously from manufactured exhalated gas scattered in water using hollow fibers
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Air is required for underwater breathing. Typically, an air tank filled with compressed air is taken underwater to enable breathing. Underwater activities are only possible until the compressed air is depleted. If air could be supplied in real-time underwater, it would effectively improve the duration of underwater stays. To increase the amount of usable air underwater, exhaled gas can be processed to reduce carbon dioxide, allowing it to be reused. In this study, manufactured exhaled gas was mixed with water using a hollow fiber membrane, and the possibility of underwater breathing using the separated gases was investigated through another hollow fiber membrane. As the amount of mixed water increased, the amount of carbon dioxide in the separated gas decreased. Water was supplied at a rate increasing from 10 LPM to 30 LPM, and manufactured exhaled gas was introduced at a rate increasing from 1.2 LPM to 6.3 LPM. When water was supplied at 30 LPM and exhaled air was introduced at 6.3 LPM, the amount of carbon dioxide in the separated gas was 0.75%. This study demonstrates that by continuously processing manufactured exhaled gas underwater, the separated gas can be used in real-time for underwater breathing.
Abstract
Air is required for underwater breathing. Typically, an air tank filled with compressed air is taken underwater to enable breathing. Underwater activities are only possible until the compressed air is depleted. If air could be supplied in real-time underwater, it would effectively improve the duration of underwater stays. To increase the amount of usable air underwater, exhaled gas can be processed to reduce carbon dioxide, allowing it to be reused. In this study, manufactured exhaled gas was mixed with water using a hollow fiber membrane, and the possibility of underwater breathing using the separated gases was investigated through another hollow fiber membrane. As the amount of mixed water increased, the amount of carbon dioxide in the separated gas decreased. Water was supplied at a rate increasing from 10 LPM to 30 LPM, and manufactured exhaled gas was introduced at a rate increasing from 1.2 LPM to 6.3 LPM. When water was supplied at 30 LPM and exhaled air was introduced at 6.3 LPM, the amount of carbon dioxide in the separated gas was 0.75%. This study demonstrates that by continuously processing manufactured exhaled gas underwater, the separated gas can be used in real-time for underwater breathing.
참고문헌 (5)
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- P. W. Heo, "Composition of mixed gas with exhalation characteristics separated by dissolved gas separator with multi-stage passive mixer", Journal of Advanced Marine Engineering and Technology, 46(5), pp.270~276 (2022)