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Humidity calculation

2025-03-30View Original

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1. The exhaust temperature is 120 degrees, with a moisture content of 0.25 kgH2O per KG of air. I would like to ask how to calculate relative humidity. 2. The exhaust air temperature is 140 degrees, with a relative humidity of 30%. How is moisture content calculated?
Reply #22025-03-30
1. To calculate relative humidity, it is first necessary to find or determine the saturated vapor pressure of water at 120 degrees using a formula. Subsequently, the actual vapor pressure is calculated using the moisture content data through appropriate formulas or charts. Relative humidity = (Actual vapor pressure/Saturated vapor pressure) × 100%. 2. First, use the relative humidity of 140 degrees along with the saturated vapor pressure obtained from a table to calculate the actual vapor pressure. Then, the moisture content is calculated using this actual vapor pressure and the saturated humidity at the known pressure, through a formula. .
Reply #32025-03-31
The saturated vapor pressure is greater than the total pressure

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