As implied by its name, an ejector is a device used to draw in gas from a certain system. It works pretty much the same with an air compressor in terms of working principle. The primary difference, however, is that it does not have any moving parts unlike the case with a vacuum pump or air compressor. This is the main reason why it costs much lower and works easier as well as it is maintenance-free. Ejectors follow the same operating principle. That is the pressure energy existing in the fluid is changed into velocity energy through an adiabatic expansion.
Once the pressure energy of the fluid drops, it will produce a low-pressure zone below the mixing chamber. With this created zone, the fluid will begin to progress toward it and combine with it within the mixing cylinder. It is during this mix that the motive fluid gets in the portion of the ejector where the velocity is converted into the desired pressure energy. In essence, ejectors are just simple devices that utilize energy within a high-pressure motive fluid that can either be liquid or gas which will then be compressed into a low-pressure fluid. Its velocity is up to 900 meters each second.
When it comes to the capacity of an ejector, it is influenced by its dimensions. If the needed capacity is high, then more than one device can be used to meet it. They can then be setup in a manner that they work in parallel. In cases where higher compression or pressure is necessary, the devices can be arranged in series. Finally, in terms of installation, the device can be installed in different orientations. However, it is crucial to have an allowance in removing any solid particulates from the motive fluid. This is to prevent such particles from reducing the overall capacity of an ejector.
Comments