Vacuum pump, solution
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Water ring vacuum pumps: What factors affect the vacuum level? What is the impact of high water temperature? Could fellow sea enthusiasts help analyze this?
When the temperature of the working fluid is high, its boiling point decreases under negative pressure, which increases the rate of evaporation; the water vapor drawn by the vacuum pump then reduces the level of vacuum.
The working fluid is at a high temperature, it contains bubbles, there is an insufficient supply of the working fluid, the liquid level in the front buffer tank is too high, and the cooling effect in the front area is poor
Simply put, at standard pressure, the boiling point of water is 100 degrees, but a significant amount of water vaporizes at temperatures above 50 degrees. Similarly, in a vacuum environment, the boiling point of water is lower; assuming it is 60 degrees as the boiling point of water, then water will start to vaporize at 40 degrees. At this point, the vacuum pump draws not only the air inside the system but also some of the gas generated by the vaporization of water itself, which results in insufficient pumping capacity. An insufficient pumping capacity in turn leads to a low level of vacuum. This is the question you asked.
The first half is completely understandable, but I can’t connect the part about water vapor to my existing knowledge. Could you please explain it again? Thank you very much.
How can it be reduced? Please let Clover know.
This is the principle of a vacuum pump, but I still don’t understand whether it’s true that when more water vaporizes, there is less water available, and thus less water is driven by the impeller. If we take this to an extreme, wouldn’t a vacuum be created even in the absence of water? It’s just that we’re dealing with a water-ring pump used for transporting acetylene gas; is water used to maintain pressure in this case?
With more gas present, the pressure increases, and as a result, the vacuum level decreases
It’s stated in the manual that comes with the pump you purchased; you need to check that manual. P
When the temperature of the working fluid is high, and under a vacuum environment its boiling point decreases, the amount of evaporation increases. As a result, the vacuum pump has to draw in more vaporized gas from the working fluid; consequently, less gas is removed from the system, and the vacuum level drops!
Without water, there can be no vacuum. Go and look up animated diagrams related to the principles of chemical engineering machinery – specifically those showing water ring pumps. Once you’ve seen those, this problem will become much simpler to understand