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Old September 25th 04, 12:46 AM
John Doe
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Jim Kingdon wrote:
The thing about ECLSS is that it requires various ducts, connections,
software, and the like.


Destiny has it all. Remember that it has dehumidifiers, CRDA, air quality
stuff etc, as well as central ventilation system, as well as the valves to
release O2/N2 from Quest into cabin. (Although I think that each module exched
for node 1 also has the capability to release O2/N2).

not expecting to see a retrofit which involves running a water line
(for example) to an existing rack in the Lab or such.


There are water lines through the CBM hatches. I think that they will
eventually want to pull the water from the dehumidifier in Destiny to the O2
generator. Currently that water is bagged and brought manually to the russian
segment. (there are no water lines aft of Node 1).


Could one design ECLSS in a more "appliance" like way? For example,
having the astronauts carry the water over in a bag and put it into an
oxygen generator manually from time to time?


That is what is being done right now.

Could one run semi-ad-hoc lines fairly easily using things like
flexible tubing


Yes they "could". However, it is unlikely for the US segment since everything
has been so carefully planned, not sure they will need "ad-hoc" and not sure
they will tolerate ad-hoc, especially if it needs to cross CBM hatches.

getting through a hatch. The standard ISS solution, as I understand
it, is a through-hull on each side, followed by an EVA to hook them
up.


nop. the proper way is to use the connections that are already in the CBM that
stay within the pressurized volume. There are a whole bunch of connections
already planned/provided between CBM hatches with the "jjumpers" installed
from inside the vestibule (pressurized volume).

Not sure that NASA would want new holes drilled in that section though since
it would invalidate the "air tight" testing that was done on earth pior to launch.

Fortunatly, there are already connectors for water, air, O2, N2, water, video,
power, data etc etc etc.