Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
Inexpencsive source of high-pressure air- question to experts. 1
- Thread starter xyzz
- Start date
-
1
- #2
Montemayor
Chemical
xyzz:
Anytime you diminish the total amount of product in a process you should expect the unit cost to increase.
When you proceed to reduce the amount of 300-bar air down to 0.5 lt/24 hrs, you should really be in a very expensive range of air --- that is, unless you are next door to a large source of this air and you can buy the rather small quantity you seek from them at an incremental price.
Otherwise, get ready to confront a very expensive air cost.
I am citing the above not from textbooks or quoting anyone. I am relying on hands-on experience of many years in the business.
Anytime you diminish the total amount of product in a process you should expect the unit cost to increase.
When you proceed to reduce the amount of 300-bar air down to 0.5 lt/24 hrs, you should really be in a very expensive range of air --- that is, unless you are next door to a large source of this air and you can buy the rather small quantity you seek from them at an incremental price.
Otherwise, get ready to confront a very expensive air cost.
I am citing the above not from textbooks or quoting anyone. I am relying on hands-on experience of many years in the business.
In a recip, taking atmospheric air to 300 bar is 5 stages (if you limit each stage to under 4 compression ratios--if you need oil-free air then you're talking about a 9 stage centrifugal). I can't even comprehend the shape of the inter and after coolers for 0.5-1.0 l/day.
If you can't use nitrogen, then I would look at buying one oxygen and 4 nitrogen bottles and making my own air. You can get industrial gases at around 700 bar so you would be so much money ahead to let someone else do the compression on a reasonable scale.
David Simpson, PE
MuleShoe Engineering
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
The harder I work, the luckier I seem
If you can't use nitrogen, then I would look at buying one oxygen and 4 nitrogen bottles and making my own air. You can get industrial gases at around 700 bar so you would be so much money ahead to let someone else do the compression on a reasonable scale.
David Simpson, PE
MuleShoe Engineering
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
The harder I work, the luckier I seem
- Thread starter
- #5
Thank you for your replies.
Unfortunately, the key word in my question is to produce.
Size and weight are also considerations.
Is there anything less expensive than $2000+ piston compressors?
Maybe a pressure booster? Yes, I know about Haskel but their price is comparable to the mentioned compressors.
Is there a less expensive alternative?
Unfortunately, the key word in my question is to produce.
Size and weight are also considerations.
Is there anything less expensive than $2000+ piston compressors?
Maybe a pressure booster? Yes, I know about Haskel but their price is comparable to the mentioned compressors.
Is there a less expensive alternative?
- Thread starter
- #7
- Status
Similar threads
- Locked
- Question
- Locked
- Question
