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smathur72
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Join Date: Dec 2013
Posts: 6

Moisture Calculation

12/17/2013 1:10 AM

Hello,

I would like to calculate the water content in air when temperature and Relative humidity are given.

other than chart ,can I use some excel formulas or suggest some website who can run similar program.
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dvmdsc
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#1

Re: moisture calculation

12/17/2013 1:22 AM

You need to make a sheet, based on the psychometric tables. These tables are pretty much loaded and working it in Excell needs some imagination. Pressure can be a next parameter.

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PWSlack
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#2

Re: moisture calculation

12/17/2013 2:16 AM

Agree with #1↑. Create a table in a second Excel sheet on the basis of the data in a psychrometric chart, then use the =Lookup function in the first.

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Tornado
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#3

Re: moisture calculation

12/17/2013 3:24 AM

Try Googling "psychrometric software".

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mrswamy
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#4

Re: Moisture Calculation

12/18/2013 2:16 AM

Psychrometry analysis software is available. Use search engne to check it and use it.
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Zvi
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#5

Re: Moisture Calculation

12/18/2013 3:10 AM

SMathur,

There's no end of free and low-cost psychrometric analysis programs that you can download to your PC. Take your pick!

As for Excel, here's an app available from the DOE:

Good luck,

Zvi
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Zvi
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#6
In reply to #5

Re: Moisture Calculation

12/18/2013 3:36 AM

Problem with the ASHRAE link. Try this: ASHRAE psychrometric plug-in
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welderman
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#7

Re: Moisture Calculation

12/18/2013 9:03 AM

I use a chart distributed by Shaw. If you want to do the math yourself you can use the equations used by instrument makers such a Davis. If you want truly technical data, try NOAH or NIST.
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Tornado
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#8
In reply to #7

Re: Moisture Calculation

12/18/2013 10:13 AM

That would be NOAA rather than NOAH.

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horace40
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#9

Re: Moisture Calculation

12/18/2013 10:25 AM

Download a free moisture calculator. I use it all the time for compressed air. Lovely little programme, numerous options, but you have to know what you are doing.

http://cosaxentaur.com/downloads?files_category_id=107

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