Quality requirements for steam and pressure levels for steam ejectors
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What are the requirements for the quality of steam used in steam ejectors? What is the difference between saturated and superheated? What is related to the level of vapor pressure? Let the expert help us :)
It is generally better to use superheated steam, as saturated steam still contains some water. The pressure used is generally determined according to the requirements of the vacuum pump; too high a pressure leads to waste, while too low a pressure results in poor efficiency!
It seems that the pressure is not less than 0.6 MPa
There was a project done for this thing some time ago, and simulations were carried out using ANSYS. When it comes to this thing, it can’t be simply determined by what specifications are needed; rather, it depends on your objectives. Different objectives result in varying requirements for working steam; furthermore, different ejectors also have an impact ； But one thing is that this usually uses superheated steam; the flow velocity in the throat of the ejector is very high – my simulations show that it exceeds the speed of sound. Using saturated steam results in poor performance, as condensate is produced as a byproduct.