Compressed Air
Compressed Air
(OP)
If I direct compressed air to the inlet of a compressor, would I expect a benefit because of a higher inlet presssure or would it be at ambient pressure since it is released? I beleive I am asking the correct forum?





RE: Compressed Air
RE: Compressed Air
That is what is called two stage (or any) compression, in which air (or any gas) is compressed initially to certain pressure, cooled down and again compressed to the required pressure. For optimum energy consumption the ideal intermediate pressure should be sqrt(p1*p2). Both pressures are absolute values.
The mechanical strength of the two stages are designed as per the pressures. You cannot put high pressure air on lower stage compressor.
Note: You have to take care not to expand the air before entering the cylinder.
Regards,
Truth: Even the hardest of the problems will have atleast one simple solution. Mine may not be one.
RE: Compressed Air
RE: Compressed Air
i am agree with above anseer for design of two stage compressor but if we used two compressors in series we shoulld put in our mained what is recmended inlet temp. and max. inlet pressur for 2nd comp.
RE: Compressed Air
RE: Compressed Air
RE: Compressed Air
RE: Compressed Air
thanks
RE: Compressed Air
The reasons cited are metallurgical, lubrication and efficiency factors.
So connecting the compressed air into the inlet of another compressor muct be checked for the temperature of the compressed gas.
RE: Compressed Air
What can you can cool the first stage gas to is dependent on your cooling medium and how close of an approach you want to design your cooler for be it air, water or some other medium. The closer an approach, the more area you need but you save on compressor Hp, it's a trade-off.
For air coolers, 10C approach is a common lower limit, 20C would not seem unrealistic. If someone is trying to tell you they need the interstage gas cooled to ambient air temperatures using an air cooler (and I'm guessing this from your post), they don't know what they are talking about. It's impossible.