Can using mineral oil instead of water in a water jet pump increase the ultimate vacuum level?
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This post was last edited by yxmqh on 2010-9-26 at 14:46. If mineral oil is used as the jet fluid in water jet pumps and steam jet pumps, has anyone tried this approach? Can it improve the ultimate vacuum level? Experts, please share your insights.
Use mineral oil? The surface tension is so high; that won’t work! It is recommended to try using an aqueous solution of salts, such as a potassium chloride solution; be sure to consider corrosion prevention!
Generally, compared to water, mineral oil has a higher viscosity and a lower specific gravity. At the same pressure, higher oil viscosity results in a lower flow rate; at the same flow rate, a lower specific gravity of the oil means less energy capacity, while higher viscosity leads to greater energy consumption. Therefore, the vacuum level not only fails to increase but may even decrease. To increase the vacuum level, liquids with low viscosity, high specific gravity, and high boiling points can be selected. This post was last edited by Wang Genrong on 2008-11-26 09:00]
The principle of jet flow is to convert static pressure energy into kinetic energy, thereby creating a vacuum that can draw in substances; subsequently, kinetic energy is converted back into static pressure energy. It is also a process of energy conversion. If one wants to draw in solid materials underground, it is not sufficient to simply change the working fluid. I agree with the view expressed by the person on the 3rd floor.
Please have experts with practical experience and professional engineers conduct certification.