Welcome to OnlineConversion.com Forums

 OnlineConversion Forums m3/h
 [ Home ] [ Forum Home ] Register FAQ Calendar Search Today's Posts Mark Forums Read

 Convert and Calculate Post any conversion related questions and discussions here. If you're having trouble converting something, this is where you should post.* Guest Posting is allowed.

#1
12-03-2007, 06:39 PM
m3/h

I need to find out how to convert say 50,000 m3/h of an airflow at 90% relative humidity to its water equivalent when it passes through a dehumidifer prior to entering a spraydrying plant.
#2
12-03-2007, 07:18 PM
 Mrs X can't count, can't spell! Join Date: Feb 2006 Location: New Zealand Posts: 2,381 Rep Power: 11
Re: m3/h

Quote:
 Originally Posted by peadarmac I need to find out how to convert say 50,000 m3/h of an airflow at 90% relative humidity to its water equivalent when it passes through a dehumidifer prior to entering a spraydrying plant.
Hi, do you mean you want to find how much actual water is in your air in total, or do you want to find out how much water is left in your air after dehumidifying? any information you already have is really helpful to post, too.
#3
12-04-2007, 12:50 PM
Re: m3/h

The figure for the total amount of water in the air prior to dehumifying plus the amount of water which will be taken out of the air after dehumifying.
I am not fully versed in the dehumidifying process or the actual relative humidity required dut i think a figure of 60% is needed in the air for spraydrying
#4
12-04-2007, 01:37 PM
 Mrs X can't count, can't spell! Join Date: Feb 2006 Location: New Zealand Posts: 2,381 Rep Power: 11
Re: m3/h

Quote:
 Originally Posted by peadarmac The figure for the total amount of water in the air prior to dehumifying plus the amount of water which will be taken out of the air after dehumifying. I am not fully versed in the dehumidifying process or the actual relative humidity required dut i think a figure of 60% is needed in the air for spraydrying
Hi,

You could try using this calculator:

I've not tried it my self, so am just suggesting it, not recommending it. You might want to do a bit of reading around the subject - pressure and temperature also play a very significant part in humidity measurements, and you haven't mentioned them. You need to find out about measuring them as well.

This site might be worth having a look at too:
http://www.engineeringtoolbox.com/ps...rms-d_239.html

Good luck.
#5
12-04-2007, 09:04 PM
 Roy Nakatsuka Guest Posts: n/a
Re: m3/h

Quote:
 Originally Posted by peadarmac The figure for the total amount of water in the air prior to dehumifying plus the amount of water which will be taken out of the air after dehumifying. I am not fully versed in the dehumidifying process or the actual relative humidity required dut i think a figure of 60% is needed in the air for spraydrying

Here is a table that shows the absolute humidity (water content) in grams per cubic meter at various combinations of temperature and relative humidity:
Climate/humidity table
http://www.tis-gdv.de/tis_e/misc/klima.htm
Temperature has a very large effect on the water content of air. For example, using data from the table on the webpage, here is the amount of water that would be removed in reducing the humidity from 90% to 60% for air at various temperatures:
Code:
```         |  Water Content |    Water Content     |   Water Removed
|  Grams Per m3  | Liters Per 50,000 m3 |      Per Hour
Temp  |  Rel Humidity  |     Rel Humidity     | From RH 90% to 60%
°C   |   60%    90%   |      60%    90%      |  Liters  Gallons
-------+----------------+----------------------+--------------------
+30  |  18.2   27.3   |      910   1365      |    455     120
+25  |  13.8   20.7   |      690   1035      |    345      91
+20  |  10.4   15.6   |      520    780      |    260      69```
Notice that 75% more water is removed from air at +30°C versus air at +20°C (455 liters versus 260 liters).

If you need to do any other calculations from the numbers on the webpage, here are the conversion factors to use:
1 kilogram of water = 1 liter
1 liter = 0.264 U.S. gallon
#6
12-04-2007, 09:15 PM
 Pizza_Pi Guest Posts: n/a
Re: m3/h

That's very right Roy. I couldn't say that better myself. I give you full kudos.
Also Roy, instead of m3 as m to the third, you can also use m^3, or enter the keymap of your windows accessories and input m³

 Thread Tools Display Modes Linear Mode

 Posting Rules You may post new threads You may post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Main Forums     Convert and Calculate     Resources     General Chat

All times are GMT -8. The time now is 09:56 PM.