Unlock the secrets of moist air! Our Psychrometric Calculator helps you quickly determine crucial properties like relative humidity, dew point, wet bulb temperature, and specific enthalpy. Essential for HVAC design, weather analysis, and indoor climate control. Get instant, accurate results for better environmental understanding and planning.
Formula:
A psychrometric calculator derives various properties of moist air based on a few known inputs. Typically, if you know at least two independent properties (e.g., Dry Bulb Temperature and Relative Humidity) and the atmospheric pressure, all other properties can be calculated. Key formulas involve relationships for Saturated Vapor Pressure (Ps), Actual Vapor Pressure (Pv), Dew Point Temperature (DPT), Specific Humidity (W), Wet Bulb Temperature (WBT), and Enthalpy (h).
A fundamental step is calculating actual vapor pressure:
Pv = (RH / 100) × Ps(Tdb)
- Pv: Actual Vapor Pressure
- RH: Relative Humidity (%)
- Ps(Tdb): Saturated Vapor Pressure at Dry Bulb Temperature (Tdb)
The calculation of other properties like WBT and DPT often involves iterative methods or complex empirical equations, as these properties are interdependent. Our calculator uses established psychrometric equations for accurate results.