Dear Mr mall,

To calculate the moisture content in air, you need to know:

temperature

pressure

relative humidity (RH)

Try the attached spreadsheet.

If you switch off the cell protection, you will see the used formulas.

success

teus

Attachments

condensation_2 (ZIP)

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Dear:- Teus Tuinenburg

hou r u

while going thru your calculation for moisture load, some quiries arosed with me

1) in this calculation objective is to calculate moisture in air

that u have calculated condensated mass if iam wrong kindly enlifgten me

2) To calculate moisture load one should take volume of air into consideration

forgive me if iam wrong

rahul ■

Dear Mr rahulchaubey,

I am fine, thank you.

Condition 1 is to calculate the water(vapor) content of 1 kg of dry air.

If you change the condition of this 1 kg of dry air from condition 1 to condition 2, then the

result is condensation and a RH of 100% or no condensation and a RH of 100% or lower.

This occurs when compressing and cooling air.

(Plant air system or in pneumatic conveying)

Then it is also possible to calculate the absolute mass of condensation when the

amount of air is given.

Also a calculation is given in the spreadsheet based on the measured temperatures of a dry- and a wet bulb thermometer.

best regards

teus ■

Dear Mall,

The spreadsheet (attached earlier in this thread) is based on the psychrometric chart.

Formulas are hidden in the spreadsheet cells, which can be approached when you switch off the cell protection.

If the spreadsheet can use the psychrometric chart, certainly you can too.

success

teus ■

dear Mall,

perform a measurement and calculation according your intended method and check the result against the spreadsheet program.

If the two results are the same, then you know that your intended method is OK.

You can also program a programmable calculator and then you do not need a chart at all

success

teus ■