Inlet guide vanes
Inlet guide vanes
(OP)
Can anyone tel me about the use of inlet guide vanes and the advantages of its use. Are there any sites for more information.
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RE: Inlet guide vanes
igv's are design to pre-rotate or spin the air in the direction of fan/compressor rotation. this has a flow-modifying and a resistance effect. this allows operating a constant speed fan at different process conditions. the igv's should be built as part of the fan/compressor by the mfg.
some factors to consider are power consumption & turndown.
there are several web sites - try "inlet guide vanes" at the google search site and you will note the multiple applications.
good luck!
-pmover
RE: Inlet guide vanes
As pmover states inlet guide vanes spin the gases or air in the direction of rotation and by doing so are a much more efficient method of turndown than a throttling device.
Variable speed is the only method that is more efficient than IGVs by a significant margin but is not suitable for every application. The big difference is that variable speed also reduces the fan peak pressure in the ratio of square of the speed. This can be a problem if the system resistance curve is relatively flat. Inlet guide vanes have the advantage in this case as the peak pressure capability remains more or less unchanged with turndown.
The subject is a very broad one and if you can make the question more specific I can give you a more focussed answer. There is a good AMCA publication covering the various control systems and their applications among other things.
RE: Inlet guide vanes
RE: Inlet guide vanes
In light of that, I will give another link that will take the discussion one step further.
Check www.chengfluid.com for other applications of inlet guide vanes, all over the map. It is a very interesting concept, and works.
rmw
RE: Inlet guide vanes
"Flow variation with inlet guide vanes for LNG Compressors"