Pumping capacity under different vacuum conditions
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May I ask a question: For example, if a vacuum pump has a pumping capacity of 350 m³/h, and during the vacuuming process of a 30 m³ reactor, the initial pressure is 100 kPa; at that point, the corresponding volume is 30 m³. When the vacuum level reaches 20 kPa, is the corresponding volume 30 m³ / 5 = 6 m³?； It still starts at 100 KPa, with a corresponding pumping volume of 350 m³/h; when the vacuum level drops to 20 KPa, the corresponding pumping volume is 350 m³ / 5 = 70 m³/h. Here, there is a practical issue to address, which is estimating the air volume of the system in the reaction vessel under vacuum conditions. Or does any expert have this algorithm?
Determine the amount of evaporation at the corresponding vacuum condition
Yes, because the saturated vapor pressure at that temperature is generally available; but how is the amount of evaporation calculated? Is the volume calculated using PV=nRT? If not, then how can we calculate his evaporation rate? Thank you.
In the chemical industry, the selection of vacuum equipment involves a heat balance calculation process, and it has little to do with vacuum technology itself… Other domestic manufacturers of vacuum equipment do not possess this capability; they all use a knock-down assembly method for production, without any exceptions. We can indeed provide detailed selection guidance. But regarding this issue, you should consult your engineering team!