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Psychrometric Analysis Tool

Analyze air-water vapor mixture properties and HVAC processes. Calculate relative humidity, dew point, enthalpy, and more for moist air analysis.

Psychrometric: Tdb=25°C, Twb=20°C
RH = 65.8%

Psychrometric Analysis Tool

Analyze air-water vapor mixture properties and HVAC processes

Property Calculator

Calculate psychrometric properties based on different input combinations

kPa
Standard atmospheric pressure: 101.325 kPa
°C
Typical range: -10 to 50 °C
°C
Must be ≤ Dry Bulb Temperature

Interactive Chart

Explore psychrometric properties on an interactive chart

Current Point

Dry Bulb

- °C

Wet Bulb

- °C

Humidity Ratio

- kg/kg

HVAC Processes

Calculate common HVAC processes and analyze system performance

Sensible Heating/Cooling

Change in temperature at constant humidity

Humidification

Adding moisture to air

Mixing

Combining two air streams

Cooling & Dehumidification

AC process with moisture removal

Psychrometric Properties

Relative Humidity

-

%

Humidity Ratio

-

kg/kg dry air

Dew Point Temperature

-

°C

Specific Enthalpy

-

kJ/kg dry air

Specific Volume

-

m³/kg dry air

Vapor Pressure

-

kPa

Psychrometric Chart Dry Bulb (°C) Humidity Ratio
Simplified Psychrometric Chart Visualization

Psychrometric Analysis Fundamentals

Key Psychrometric Properties

Psychrometrics deals with the thermodynamic properties of moist air:

  • Dry Bulb Temperature (DBT): Air temperature measured by a standard thermometer
  • Wet Bulb Temperature (WBT): Temperature with evaporative cooling effect
  • Dew Point Temperature: Temperature at which condensation begins
  • Relative Humidity (RH): Ratio of actual to saturation vapor pressure
  • Humidity Ratio: Mass of water vapor per unit mass of dry air
  • Specific Enthalpy: Total heat content per unit mass of dry air

Common HVAC Processes

HVAC systems manipulate air properties through various processes:

  • Sensible Heating: Increase in temperature at constant humidity ratio
  • Sensible Cooling: Decrease in temperature at constant humidity ratio
  • Humidification: Increase in humidity ratio at constant temperature
  • Dehumidification: Decrease in humidity ratio at constant temperature
  • Cooling & Dehumidification: Combined process in air conditioning
  • Adiabatic Mixing: Combining two air streams

Additional HVAC Engineering Resources

Air Handling Units

Design and analysis of AHU systems

Refrigeration Cycles

Vapor compression cycle analysis

Building Load Calculation

Heating and cooling load estimation

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