Space Test Chamber - Backstage Science
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- เผยแพร่เมื่อ 23 ส.ค. 2011
- A space test chamber is used to re-create the conditions of space, including the vacuum and temperature.
Paul Eccleston shows us the chamber at the STFC's RAL Space facility. - วิทยาศาสตร์และเทคโนโลยี
Fascinating video!
I feel compelled to ask a series of questions of the form:
"What would happen if you put a ________ in it?"
@Chirigami hot or cold are words we use to describe the amount of thermal energy in things. Cold is just the state of having relatively lower thermal energy (heat). In space, since there's a lack of physical bodies to hold any of this energy, it is in fact very "cold".
If the chamber is almost 0 bar, there would be no matter between the cold shrouds and object inside to make the object cold. Just like in a thermos mug, so how does this effectively make a space with zero matter 'cold'?
@Chirigami Vacuum has no classical "temperature", but it still allows EM rays to exchange the heat between the system and the enviroment. So imagine what would happen to a piece of metal in this chamber if there weren't any cooling devices. It would exchange heat with the rest of the world, using rays. But if we surround it with cooling devices, the piece gives more rays than it receives, and it cools down to the temperature of the cooler, entering a new,lower equilibrium.
In space, that's ~3 K.
@BurtonRGA7 No, it means 760 mm Hg lower than atmospheric pressure, which is roughly around that point. So it's effectively around 0 mm Hg. Few milimeters don't mean a thing for such experiments.
Lol, you can see on his mask every time Paul inhales a breath
@BurtonRGA7 what I mean is that 1bar pressure isn't that high for devices that are designed to withstand pressure. that railcar isn't designed to withstand the pressure so it implodes.
assuming the door is 4.5m in diameter the force on the door would be 1.4 million newton. so the door needs to hold 142 tons.. ok that IS a lot
@gummel82 After few days, similar to mummy. The tissue would freeze in a couple of hours, and the volatiles like water would sublime. It's essentially freeze-drying. Check it on Wikipedia.
@BurtonRGA7 Nobody uses mm Hg anymore... officially. But I'm interested, what railcar are you talking about?
I was reffering to the pressure inside the chamber in the video. If it's "760 mmHg lower than atmospheric pressure" then it means "roughly vacuum". Number 760 is a special number when talking about pressures and it always means either atmospheric pressure or vacuum. It can't be a coincidence. I hardly doubt it was 0.76 bar.
space sounds spooky
How is the seal created between the access doors and the main body of the chamber? And if there is a vacuum leak how do you do about locating the exact point, do you use a Helium sniffer?
@uut0 You want to try to explain how you can get rid of gravity with magnets?
@PBDPBD i knew that, but i always thought it wouldnt radiate enough energy away and heat would build up, what i really ment was, what methods do space craft use to radiate that heat away? call me boreing but i find it interesting even the chemical coolents used to cool space suits.
@trespire thanks
Why was a little clamp on the outside of the door? It seems very silly.
@trespire Yes, it's very hostile environment, but space suits never reach such temperatures. People inside would die. That's why those suits are from special materials painted white.
Surface of the Moon will reach 200 °C because it's very dark and has very low thermal conductivity.
The temperature of space is about 3 Kelvin though, so is going down to 77 K enough? Liquid helium is a good bit more expensive though :P I never thought about the potential for things to overheat in space, fascinating. Lastly, I am amazed that the door is held shut with merely a C-clamp...
What if you would use magnets to "get rid" of the gravity in there?
so thats a good question how is heat radiated away while in space?
Dont get it, is one bar a lot of pressure?
@fossil98 The temperature in space is influenced by radiation not by conduction via particles. Temperature in space is a BIG problem because the only way to get rid of heat of a spacecraft is to radiate it away.
A lot of electronic devices do not work in space because they overheat in the absence of air.
Space Ghost Coast to Coast
Im not used to "kelvin", as my oven etc uses celsius, so I converted 77K to get my head round it better.
77K = -196.15 deg celsius (for us here in the future)
77K = -321.066 deg fahrenheit (for those who still live in the past)
Pretty chilly, then...
:P
actually the various sciences are excellent ways of achieving fame, if you could perhaps discover an element and name it after your self then there you go, instant immortality
@aluisious Well not get rid of gravity but cancel it out with a magnetic force, I've seen vids of floating strawberries and frogs in a magnetic field here on Earth, unfortunately did that take quite a big magnet to achieve that result (it probably wouldn't be feasible to get something like a satellite or whatever to float since it's far too heavy though :O).
Temperature?
Surely there isn't much a temperature could do in space because of how little material there is to influence the temperature of spacecraft.
Wasn't he the ninth Doctor? Sounds like him but with that mask I can't say for sure. Interesting that he picked up science after acting since he played a science based character.
I spot a diabolical murder weapon of James Bond proportions.
HA HA @ Leorules!
@Draxis32 It doesn't really have anything to do with trolling......the problem is, you just turned an enjoyable situation/video into a rather depressing one........all over a joke.
has a person in a space suit ever been in there?
Quack quack.
what would happen if you put a person in it? shure he will die.. but what will he look like
@nc17atnce101 Space sure is a very hostile environment, there's the challenge of thermal management for electronics explained here. Detectors in some space telescopes must be colder than space itself for them to see, so there is a challenge to insulate them from the rest of the vehicle. Mechanical fasteners screws and bolts get stuck and wont budge, metal becomes brittle. Space suits for moon walks & EVA are 200C sun side and minus 200C shade side. Yeah, its spooky out there.
They could simulate zero gravity with a free-fall tower.
Life is like a hurricane
Here in Duckburg
Race cars, lasers, aeroplanes
It's a duck-blur
Might solve a mystery
Or rewrite history
Why are you here? the reason he dresses like this may be endless. He may not want to contaminate any sensitive gear with moisture from his breathing. There may be dangerous chemicals or shrapnel in the hair he may not breathe. It's just one vacuum test chamber and it doesn't cost a million dollars to the citizens.
@Draxis32 shame on your lack of sense of humour... or shame on your trolling... either way, shame on you back! :)
@BackstageScience Trolling?!? Why does everytime I post a comment on your videos you think I'm trolling Brady?
Maybe its my salty lack of humor, maybe its why. But you know what, don't be alarmed. No reason to block me or anything.I am a subscriber for almost 2 years and I won't comment on any video anymore okay?
Jeesus, its just a coment It's like It's gonna be all over the newspapers next morning.
If that is satisfatory for you.
@Draxis32
You fail to realize the reasons why science is funded.
Space... fornication...
Is this actually useful ?
I mean, what's the point of dressing and opening doors like a neurosurgeon ?
-Look how cool I am. I open a door using my elbow and I charge million dollar bills to stupid people to test things in vacuum that's obvious they have to work on vacuum.
Gravity machine ? It's obvious they will also test those things under 0 gravity if they had such thing. They will even look cooler and charge twice as much.
3:21
"Of course we can't get rid of the gravity, If we could do that I would've patented that and made my millions long time ago."
I find this sarcarm rather disturbing Mr. Paul Eccleston, shame on you if you think this way, Science is not about money, Science is above everything, is above political,monetary or religious matters.If what you search is money and fame, you are searching in the wrong place.