 Album: German Submarines
Image: 270 / 473
Date: 2010-04-15 15:53:23
Tags: Bremerhaven, Germany, Submarines, Type XXI, U 2540 Air revitalization plant on U-2540 (Wilhelm Bauer)
Air cleaning system
The CO2 enrichment in submerged operations can be measured with the Dräger device onboard. The air cleaning system starts when the CO2 content exceeds 1.5 %. The air cleaner contains calcareous granules which bind the carbon dioxide in the air. One air filter filling is sufficient for about 4 to 5 hours of air purifying. To refill the air cleaner (2 canisters) the filling of 4 potash canisters is necessary. 450 potasch canisters are onboard as replacement.
The calculation is based on the following data: The air volume inside the hull is 900 m³. The crew consists of 60 men. The carbon dioxide output per man and hour amounts to 10 litres during sleep, 20 liters during light, mostly seated activities, 30 litres during heavier activities. Further calculations are based on the average, i.e. 20 litres per hour and man for ordinary submerged operations.
Basis of the oxygen requirement is the CO2 requirement + 10 %. Exposure Time: 1/60
Aperture: f/4.0
Sensitivity: 100 ISO
Focal Length: 24 mm
Make: Canon
Model: Canon EOS 40D
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