(snip)As an aside, the vapour pressure from water alone is almost the same as Mars' atmospheric pressure. Ie, at that pressure of water-vapour, boil-off stops. Note: Of water vapour. Doesn't help you outside, since it's a partial-pressure thing. However, if you merely stop the exchange of water-vapour and Mars air, by having an unpressurised door, you won't lose water from the water-lock once it hits vapour pressure. Hence ideally, the water temperature would be kept at the level needed to reduce the vapour pressure to ambient Mars air pressure. But in most places, that's around or just below freezing. (610pa at 0℃, 870pa at 5℃) So in practice, you'd want a low-pressure capable door. Say max difference 1 kpa. I assume you'd also have both an outer and inner door each capable of maintaining a full 1atm difference, as backup for failure elsewhere. But the water-lock lets you keep the inner-hatch open, and the water-vapour atmosphere in a low-pressure outer room lets you keep the outer hatch open. You only need a low-pressure door.Assuming you aren't struggling for every drop of water (or you wouldn't have considered a water-lock), then you don't need to worry about losing a little water-vapour when you open the low-pressure door. (snip) (emphasis added)
Something like this on Mars would be amazing...
Quote from: jpo234 on 11/25/2018 04:47 pmSomething like this on Mars would be amazing...You might want to close that window/door.
Quote from: Paul451 on 11/25/2018 10:06 pmQuote from: jpo234 on 11/25/2018 04:47 pmSomething like this on Mars would be amazing...You might want to close that window/door.Put a transparent fishtank there for rad shielding/aquaponics.
Quote from: rakaydos on 11/27/2018 04:22 amQuote from: Paul451 on 11/25/2018 10:06 pmQuote from: jpo234 on 11/25/2018 04:47 pmSomething like this on Mars would be amazing...You might want to close that window/door.Put a transparent fishtank there for rad shielding/aquaponics.Sitting in a comfy chair looking out, you'd only get cosmic radiation coming in through a 90 degree x 45 degree solid angle, approximately 1/32 of what you would get sitting out in space. Of that, it's halved again by the horizon, and then more chunks are taken out of it by terrain features. That cosmic radiation is also coming in at a steep angle through the atmosphere, through an average atmospheric slope thickness of 22.5 degrees.You'd get some backscatter, but it would be fairly small I think. A thick piece of acrylic would cut that down, and of course water would be great too.
Quote from: Lampyridae on 11/27/2018 12:14 pmQuote from: rakaydos on 11/27/2018 04:22 amQuote from: Paul451 on 11/25/2018 10:06 pmQuote from: jpo234 on 11/25/2018 04:47 pmSomething like this on Mars would be amazing...You might want to close that window/door.Put a transparent fishtank there for rad shielding/aquaponics.Sitting in a comfy chair looking out, you'd only get cosmic radiation coming in through a 90 degree x 45 degree solid angle, approximately 1/32 of what you would get sitting out in space. Of that, it's halved again by the horizon, and then more chunks are taken out of it by terrain features. That cosmic radiation is also coming in at a steep angle through the atmosphere, through an average atmospheric slope thickness of 22.5 degrees.You'd get some backscatter, but it would be fairly small I think. A thick piece of acrylic would cut that down, and of course water would be great too.At that angle, the atmosphere is equivalent to about 3 m of water. Would need a pretty big fish tank to appreciably improve that.
Quote from: envy887 on 11/27/2018 12:21 pmQuote from: Lampyridae on 11/27/2018 12:14 pmQuote from: rakaydos on 11/27/2018 04:22 amQuote from: Paul451 on 11/25/2018 10:06 pmQuote from: jpo234 on 11/25/2018 04:47 pmSomething like this on Mars would be amazing...You might want to close that window/door.Put a transparent fishtank there for rad shielding/aquaponics.Sitting in a comfy chair looking out, you'd only get cosmic radiation coming in through a 90 degree x 45 degree solid angle, approximately 1/32 of what you would get sitting out in space. Of that, it's halved again by the horizon, and then more chunks are taken out of it by terrain features. That cosmic radiation is also coming in at a steep angle through the atmosphere, through an average atmospheric slope thickness of 22.5 degrees.You'd get some backscatter, but it would be fairly small I think. A thick piece of acrylic would cut that down, and of course water would be great too.At that angle, the atmosphere is equivalent to about 3 m of water. Would need a pretty big fish tank to appreciably improve that.Think you misplaced a decimal point, Mars' atmospheric column is 20g/cm^2 and at 22.5 degrees that's about 50g/cm^2.With properly designed buildings (which colonists spend most of their time in) you could build domes* with less transparent radiation shielding. And I firmly believe that Musk is going to offer domes of some sort. The front of Starship is already half a dome. Nobody wants to go to Mars to live in a cave and peek out through an airlock portal the engineers grudgingly allowed.Water features with a thin layer of oil would be an interesting sight.*half-buried pressure vessels
Quote from: Paul451 on 11/25/2018 10:06 pmQuote from: jpo234 on 11/25/2018 04:47 pmSomething like this on Mars would be amazing...You might want to close that window/door.As long as you only sit in front of the window an hour a day, you should be OK?
Quote from: lamontagne on 11/29/2018 12:00 pmQuote from: Paul451 on 11/25/2018 10:06 pmQuote from: jpo234 on 11/25/2018 04:47 pmSomething like this on Mars would be amazing...You might want to close that window/door.As long as you only sit in front of the window an hour a day, you should be OK?Recall the inside of the F-16 glass canopy is coated with a thin layer of gold. Will some similar technique significantly reduces the radiation exposure dosage?
Quote from: Zed_Noir on 11/29/2018 09:00 pmQuote from: lamontagne on 11/29/2018 12:00 pmQuote from: Paul451 on 11/25/2018 10:06 pmQuote from: jpo234 on 11/25/2018 04:47 pmSomething like this on Mars would be amazing...You might want to close that window/door.As long as you only sit in front of the window an hour a day, you should be OK?Recall the inside of the F-16 glass canopy is coated with a thin layer of gold. Will some similar technique significantly reduces the radiation exposure dosage?In case you missed the joke, there's no glass on that opening.
But the query remains can a gold plated glass panel reduce radiation exposure on the Martian surface.
........Which is why SpaceX is heading underground: the radiation issue is solved.> Sure, living underground can be a bit oppressive. However, it won't be the first time humanity starts settling a planet by living in caves.