Re: Conversation
http://www.pdblowers.com/scfmvacfm.htm
It is in ft 3 I am sure you will be able to convert it into m3 ■
Re: Conversation
Originally posted by Günekim
nm3/h
And what is a nm3 ???
These I know ...
Prefix, decimal equivalent, exponential equivalent
Pico, 0.000000000001, 10-12
Nano, 0.000000001, 10-9
Micro, 0.000001, 10-6
Milli, 0.001, 10-3
Centi, 0.01, 10-2
Deci , 0.1, 10-1
no prefix, 1.0, 100
Deka, 10.0, 101
Hecto, 100.0, 102
Kilo, 1000.0, 103
Mega, 1,000,000. , 106
Giga, 1,000,000,000. , 109 ■
Re: Conversation
Disregarding RH (Relative Humidity)
mass of X nm^3 equals mass of y m^3
nm^3 is normal or standard volume (volume at normal(ized) conditions)
nm^3 is volume at 1 bar(absolute) and at 0 degrC
m^3 is volume at p bar(absolute) and t degrC
thus:
y m^3/hr = x nm^3/hr * (273+t)/273 * 1/p(absolute)
corresponding to the link given by Mr Mantoo.
OK
teus ■
Teus
Re: Conversation
As the lecturers used to say "Get your units right!"
nm3 (index recognised & assumed) is not a valid unit of measure in any system.
Its verbal expression slipped into specialist use during the late 1970's because some compressor type manufacturers wanted to sound clever by saying stuff like FAD & normal. The introduction coincided with education cut-backs. Air/Cloth ratio is a similar engineering distraction.
N is either nano or Newton.
If the specialists reverted to the correct terminology of @NTP & @STP then the non-specialists among us would really know what they were talking about.
Teus T has explained the confusion by partly reverting to the old correct way by adding (volume at normal(ized) conditions)...or as we used to say.... @NTP.
No reference to Timoshenko either ;-) ■
John Gateley johngateley@hotmail.com www.the-credible-bulk.com
Re: Conversation
Originally posted by johngateley
As the lecturers used to say "Get your units right!"
nm3 (index recognised & assumed) is not a valid unit of measure in any system.
Its verbal expression slipped into specialist use during the late 1970's because some compressor type manufacturers wanted to sound clever by saying stuff like FAD & normal. The introduction coincided with education cut-backs. Air/Cloth ratio is a similar engineering distraction.
N is either nano or Newton.
If the specialists reverted to the correct terminology of @NTP & @STP then the non-specialists among us would really know what they were talking about.
Teus T has explained the confusion by partly reverting to the old correct way by adding (volume at normal(ized) conditions)...or as we used to say.... @NTP.
No reference to Timoshenko either ;-)
Ok,you are right but
Value are given as XXXXX nm3/h at XXX degC at YYYpressure
I would like to be informed how can I convert this value to ZZZ m3/h at MMM degC at NNN pressure
everything is clear! While I'm designing system fan or gas duct line for rawmill, need to learn what I can do?? ■
Re: Conversation
dear Günekim
QUOTE
Ok,you are right but
Value are given as XXXXX nm3/h at 0 degC at 1 bar(absolute )pressure
I would like to be informed how can I convert this value to ZZZ m3/h at MMM degC at NNN pressure
UNQOUTE
ANSWER:
NNN = actual pressure in bar(absolute)
ZZZ= XXXXX . (273+MMM)/273 . 1/NNN m3/h
For John G, I attached a scan of my old schoolbook (year 1965) ,
where:
Nm3 = normal m3 (76 cmHg , 0 degrC)
Have a nice day
Teus
Attachments
■
Teus
Conversation
Hi everbody,
I need to numerical formula for conversation nm3/h to m3/h.I will use the formula for hot gas comes from rotary kiln.
I'm looking forward to reply from anyone knows. ■