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PostPosted: Thu 11. Sep 2014, 17:41 
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Joined: Wed 3. Sep 2014, 09:31
Posts: 33
On small ship there should not be a need for more life support modules than the one we already have.

However, on larger ship (with larger crew) more life-support modules may be needed, so in anticipation i would offer you some suggestion about how they could work.


about the system.


life support should be centered on three basic need for human which are air supply, water supply and food supply. on earth, air water and food are well balanced but in a spaceship it's the life-support system and the medical crew duty to balance it.

air supply would be centered around the quantity of oxygen and co2 in a room. The best way to assure life support would be to filter the co2, each filter having some filtering speed (quantity of co2 they can filter in a given time.) however, if a fire broke out it would generate co2 until it is extinguished (by venting the oxygen out of the ship, by sending people to extinguish it, or because there isn't enough oxygen (or too much co2) for the fire to maintain itself)

water supply would be based on water purity, impure water would cause disease in the crew like diarhea. technically one water treatment module may be enough for a large crew but there is the possibility that we can build mining ship that have metal processing modules using water and therefore increasing the water impurity.

food supply would be based on food storage, food production (with hydroponics) and food preservation (refrigeration, vacuum storage,...).

adding additionnal air and water tanks could help preventing disaster after a total loss (like air being vented out of the ship or water being too contaminated to be treated efficiently.)



about the modules

the basic life-support modules would be :

basic life-support: give basic air filtering (for 20 crew member) and make sure the ship atmosphere stay at a liveable pressure. need to be linked to the ventilation system.

water treatment : give water treatment for the use of 100 people. (on earth we could say that one human need an average of 40-50 litre a day including water used for hygiene, could be lower in space)

food storage: give food ration for 20 people for 1 to 4 month depending on the side or if we count in ration from 600 daily rations to 2400 daily rations. i rather like to speak in rations as we could for example reduce the crew number (at the start or during the travel) so they can eat for a longer time.

additionnal modules could be:


for air supply:
- air filtering modules : give air filtering for 100 people.
-ventilation system : air ventilation network that can be built in the wall to connect room to (too far away) air filtering modules (include air vent large enough for people (or other things) to crawl in, ventilator to create an air flux, air locks to prevent mass depressurization,...)


for water supply:

- sewage storage: contain water that need to be cleaned (a safety to avoid contamination of all the water if one (or more) water treatment module go damaged and fail to treat the water. )

for food supply:

- hydroponics : generate a given amount of food rations per day depending on the size also help a little in air filtering but increase water treatment need.
- vacuum storage: storing food in vacuum help preserving it from some bacteria.
- refrigeration storage : standard storage method on earth it work also in space.


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