Does the turbine-driven compressor unit have inlet guide vanes?
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As the title suggests, I would like to ask everyone: in most turbine-driven compressor units I’ve seen, there are no inlet guide vanes, and the load is regulated through the main steam valve on the turbine. However, as the opening of this valve changes, the speed also changes, which in turn causes the pressure after the compressor to change. Has anyone ever seen a turbine-driven compressor that comes equipped with inlet guide vanes? What is the difference between the two? Thank you!
We don’t have such units; we only have one chlorine turbine, which is driven by an electric motor
Air compressors generally have inlet vanes; during normal operation, the speed of the compressor cannot be adjusted significantly, and it must definitely be higher than the critical speed. When the load increases, the inlet guide vanes are opened wider and the anti-surge valve is closed; at this point, in order to maintain stable outlet pressure or to increase it, the control valves are opened further, thereby increasing the steam flow rate...
Hello, I have a compressor equipped with adjustable vanes. After the anti-surge valve is opened, the outlet pressure decreases. To maintain stable pressure, should I adjust the vanes or increase the rotational speed? I am not entirely clear about the anti-surge mechanism of compressors that operate with a fixed speed, constant outlet pressure, adjustable guide vanes, and are driven by turbines; I would appreciate any guidance you could provide
There is limited research; it can only be said that there is a decoupling control.
The last edit to this post was made by chensf123 on 2019-2-26 at 23:11. If the anti-surge valve is already at an open position, consider closing it first, as it will not increase the load on the unit； If it is necessary to maintain the opening of the surge valve (taking subsequent stages into account), steam should be turned on first (for the same reason) in order to maintain the outlet pressure and flow rate; however, this will cause the unit to surge, so it is necessary to increase the guide vane setting in order to stabilize the outlet flow rate and pressure. They influence each other; increasing the load will cause the speed to drop, and in order to maintain that speed, you have to open the steam valve wider to keep the rotation steady ； If the gas consumption at the outlet increases, you need to increase the guide vanes as well as the amount of steam to stabilize the rotational speed ； That’s why the concept of decoupled control exists.