.AixLib.Airflow.AirHandlingUnit.ModularAirHandlingUnit.Components.SprayHumidifier

Information

This model provides a idealized spray humidifier. The output air humidity is calculated either using the input air humidity and the mass flow rate of water:

m_air,in X_air,in + m_wat,in η_B = m_air,out X_air,out

or it is calculated using a set point for the humidity at the outlet if the parameter use_X_set is set to true. Note: If the relative humidity with the givin set-point or mass flow rate of water would exceed saturation the humidification is reduced to reach saturation as maximum. Additionally a warning will be thrown.

The energy balance is formulated using the enthalpy of the air streams and the enthalpy of the water:

m_air,in h_air,in + m_wat,in h_wat,in η_B = m_air,out h_air,out

The humidifying degree η_B is calculated using the water to air ratio E:

η_B = 1 - exp(-k E)

E = m_wat,in ⁄ m_air,in

If the boolean variable simplify_m_wat_flow is set to true, the mass flow rate of the water is not considered for the mass balance. Moreover the enthalpy of the water is neglected for the energy balance.

The equations are based on [1].

References

[1]: Baumgarth, Hörner, Reeker (Hrsg.): Handbuch der Klimatechnik, Band 2, 5. Auflage, VDE Verlag GmbH, 2011 (pp.304-306)

Revisions

• April, 2019, by Martin Kremer:
  First Implementation.
• April 2020, by Martin Kremer:
  Extended from PartialHumidifier.
• January 2022, by Martin Kremer:
  Implemented maximum limit for saturation.