Curtesy of https://www.engineeringtoolbox.com/
Latent Heat Flow
Latent Heat Flow - SI-Units
The latent heat flow due to moisture in air can be expressed in SI-units (metric) as
Ql = hwe ρ q Δx / 3600 (2)
where
Ql = latent heat flow (kW)
hwe = latent heat of vaporization of water (2454 kJ/kg - in air at atmospheric pressure and 20oC)
ρ = air density at standard conditions (1.202* kg/m3)
q = air flow (m3/hr)
Δx = difference in humidity ratio (kgh2o/kgdry_air)
Sensible Heat Flow
Sensible Heat Flow - SI-Units
The sensible heat flow can be expressed in SI-units (metric) as
Qs = cp ρ q Δt / 3600 (1)
where
Qs = sensible heat flow (kW)
cp = 1.005* - specific heat air (kJ/kg K)
ρ = 1.202* - air density at standard conditions (kg/m3)
q = air flow (m3/hr)
Δt = temperature (oC)
* Note that air properties changes with temperature. Interpolate values if necessary.
Mollier Diagram