Re: International Space Station is very noisy


simple_language@xxxxxxxxx wrote:
Pete Vincent wrote:

There is no air convection in free fall. No matter how you generate
oxygen or recycle CO2, you must have fans to move the air past
your processing plant, and to distribute heat and oxygen to
all the living spaces. Similarly all the water in your greenhouse
must be pumped. It's not clear that this system would be any
quieter than what they've got. Large slow moving fans are generally
quieter than small ones for the same air movement, but space
is very much at a premium on the station, so that's not a
good option.

You can spin the greenhouse to generate pseudogravity.
You can make small windows to let concentrated sunlight
into the greenhouse. The windows can be cooled with
a pool of water held by pseudogravity on the windows.
This design replicates the biosphere of the Earth.
Water evaporates and condenses on cool soil. There
is no wind, but there is enough air circulation to
support life.

The cost of Earth-to-orbit transportation is determined
by cargo mass rather than cargo volume. Furthermore,
Canadian telerobot called Dextre can assemble the
greenhouse from narrow pieces of sheetmetal densely
packed inside a rocket launcher. Dextre is a very
advanced space telerobot -- it can handle bolts.
More info: http://www.space.gc.ca/asc/eng/iss/mss_spdm.asp

Very little useful science is done in the International
Space Station (ISS). Its real purpose is making TV news
featuring photogenic "astronauts." Most of the work done
by the "astronauts" is maintenance -- the ISS is poorly
designed and it breaks down frequently.

No shit. If you are not growing plants in space, then you really need
to completely rethink your entire metabolic system. Man plant or man
Borg, it's your choice.

.

Relevant Pages

  • Re: International Space Station is very noisy
    ... you must have fans to move the air past ... Large slow moving fans are generally ... You can spin the greenhouse to generate pseudogravity. ... You can make small windows to let concentrated sunlight ...
    (sci.space.policy)
  • Re: Zarqawi meets the MK82
    ... No wonder that website is called Hot Air. ... Look at its fans. ... GROW YOUR OWN DOPE! ... Plant a liberal. ...
    (alt.religion.islam)
  • Re: BTUs per dollar
    ... but more resistance to air flow). ... I would guess that venting the hot greenhouse air in the summer should be up ... sewer pipe. ... with solar heating boosting the daytime temp. ...
    (rec.gardens.orchids)
  • Re: BTUs per dollar
    ... Cool air would be drawn in from the pipes by natural convection, ... I was just thinking of keeping the humidity level up by recirculating the air, ... I can see this method working on a small hobby greenhouse. ... A thermostatically-controlled fan in the GH drew air through the submerged pipe, where the natural subsurface temperature was in the low-'60's F year round, which is certainly plenty warm for nighttime, with solar heating boosting the daytime temp. ...
    (rec.gardens.orchids)
  • Re: Newbie
    ... If you can take digital pictures of your greenhouse, from several angles, ... could not tell how large the exhaust opening in the gables are or if the ... total exhaust area was using a fan to draw out the hot air. ... passive gable opening and expelling it again with the exhaust fan. ...
    (rec.gardens.orchids)