## Humid Air : Enthalpy |

Air psychrometrics |
## 1. Introduction The enthalpy of the humid air is, at a given pressure, the
energy necessary to heat 1 kg of dry air from the reference
temperature T
## 2. Calculation## General form
H' = Cp'.(T-T_{0})
+ ω.Λ_{0}With : H' = enthalpy of humid air (J/kg_dry_air)Cp' = specific heat of humid air (J/K/kg_dry_air) T = temperature of calculation (K) T _{0} = temperature of reference (K)ω = Absolute humidity of air (-) Λ _{0} = vaporization enthalpy at T_{0} (J/kg)
## In practice, at 273 KH' = (1005 +
1884*ω).(T-273) + 2.5023.10^{6}.ω |