Difference between revisions of "Atmosphere"

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There are several different types of atmospheres to consider.
 
There are several different types of atmospheres to consider.
  
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Most desirable for long term habitats in space is somewhere around 40kPa total with about 60% oxygen.  In the event of an sudden depressurization this ratio means you do not have a hard transition to switch to your backup breathing systems.  The rest is Nitrogen, water vapor and trace amounts of CO2 which can be isolated quite easily.
 
Most desirable for long term habitats in space is somewhere around 40kPa total with about 60% oxygen.  In the event of an sudden depressurization this ratio means you do not have a hard transition to switch to your backup breathing systems.  The rest is Nitrogen, water vapor and trace amounts of CO2 which can be isolated quite easily.
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[[Category: Life Support]]
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[[Category: Air Supply]]

Revision as of 20:56, 8 June 2007

There are several different types of atmospheres to consider.

Lunar atmosphere[1] Earth's atmosphere[2] Atmospheric pressure on Earth[3]

The most important for Lunar development is the pressure inside your space suit or habitat. Here is a listing of the relative pressures of other environments and the percentage oxygen in each.

Earth Sea Level Oxygen (21%) - 101.3 kPa Mercury Program (100%) - 34.5 kPa Apollo Program (100%) - 34.5 kPa Skylab (70%) - 34.5kPa Space Shuttle (28.5%) - 70.0 kPa

Cabin Pressurization[4]

Generally if you don't get enough oxygen pressure you will get altitude sickness[5]

In the extreme case of a severe leak in space, you have to consider what the Death Zone does to climbers on Everest[6]

Most desirable for long term habitats in space is somewhere around 40kPa total with about 60% oxygen. In the event of an sudden depressurization this ratio means you do not have a hard transition to switch to your backup breathing systems. The rest is Nitrogen, water vapor and trace amounts of CO2 which can be isolated quite easily.