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Alex2014-12-06 23:41:24
Physics
Alex, 2014-12-06 23:41:24

What happens in a closed vacuum system (more details in the description)?

Please do not swear if I write something wrong, because the level of knowledge in the field of physical processes is not as high as we would like.
If you place a liquid in a room without air, it is known that it (water) will
boil vapor in vacuum?
And if so, why not make a closed system with water, a condenser, a turbine, and generate energy?
If not:
2nd question: water, after all, will be in motion (seething)
Even if steam generation does not occur, is it not possible to obtain energy from this movement of water particles?
Question 3: will water boil forever if the airless state of the system is left, and where will the energy come from in this case, for the process of boiling water, if so?
Suppose we have a room of 0.5 cubic meters with atm pressure, when water starts to boil at the temperature of the room itself (24 degrees Celsius)
Will there be the same strong steam generation as when boiling at 100 degrees Celsius, at normal atm pressure? If so, why is the water cool after being removed from the vacuum environment?
The main question is, is it possible to reduce the pressure in the room so that intensive steam generation begins, the turbine spins up, then condensation and boiling again and the whole process again WITHOUT intervention from outside the system?

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2 answer(s)
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Sergey, 2014-12-06
@begemot_sun

1. There is always steam above the surface of the water.
2. Water boils at a given temperature and pressure because the water vapor pressure on the water surface is higher than atmospheric pressure.
3. Accordingly, if the atmospheric pressure is reduced, then the water will boil at a lower temperature.
4. If you remove the pressure altogether, then the water will boil even at 0 (as long as it is in a liquid state)
5. The energy for the formation of steam is taken directly from the water. Those. water will boil as long as there is enough energy to boil at the given temperature-pressure.
6. This principle is used in refrigerators, where it is not water that boils, but freon (the boiling point of which starts from -30)

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Power, 2014-12-07
@Power

Please clarify one thing: a perpetual motion machine is impossible.
As for your system, usually the turbine is spinning due to the excess pressure that is created by the steam. On the contrary, you propose to lower this pressure down to vacuum (having spent energy on this, please note), then the turbine will already rotate in the opposite direction (at best) and produce less energy than you spent on reducing pressure.
Yes, and for some reason you assume that if the water boils, then the steam temperature is in no way less than 100 degrees, but this is not so.

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