# Air humidity and dew point
# Scope: Humidity ratio from supplied water-vapor saturation pressure at a known temperature.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

relativeHumidity = 0.5
saturationPressure = 3.17 kPa
totalPressure = 101.325 kPa

vaporPressure := relativeHumidity*saturationPressure [kPa]
humidityRatio := 0.62198*vaporPressure/(totalPressure-vaporPressure)

check humidity ratio budget example: humidityRatio <= 0.012

scenario alternative: relativeHumidity = 0.4