AixLib.Fluid.Sources.MassFlowSource_WeatherData

# .AixLib.Fluid.Sources.MassFlowSource_WeatherData

Ideal flow source that produces a prescribed mass flow with prescribed trace substances, outside specific enthalpy and mass fraction

## Information

Models an ideal flow source, with prescribed values of flow rate and trace substances, with temperature and specific enthalpy from outside:

- Prescribed mass flow rate.
- Boundary composition (trace-substance flow).
- Outside specific enthalpy.
- Multi-substance composition (e.g. water vapor) from outside.

If `use_m_flow_in` is false (default option), the `m_flow` parameter is used as boundary flow rate, and the `m_flow_in` input connector is disabled; if `use_m_flow_in` is true, then the `m_flow` parameter is ignored, and the value provided by the input connector is used instead.

The same applies to the trace substances.

The AixLib.Utilities.Psychrometrics.X_pTphi block is used with the input data including `pAtm`, `TDryBul`, `relHum` from weather bus `weaBus`, to calculate `X`.

The same applies to the specific enthalpy.

Note, that boundary temperature, mass fractions and trace substances have only an effect if the mass flow is from the boundary into the port. If mass is flowing from the port into the boundary, the boundary definitions, with exception of boundary flow rate, do not have an effect.

## Revisions

- March 11, 2024, by Michael Wetter:
  Corrected use of `HideResult`.
  This is for #1850.
- January 09, 2023, by Jianjun Hu:
  Changed base class to constrain medium to moist air.
  This is for IBPSA, #1681.
- November 14, 2019, by Michael Wetter:
  Removed duplicate connector.
  This is for #1248.
- January 14, 2019 by Jianjun Hu:
  Changed to extend AixLib.Fluid.Sources.BaseClasses.PartialSource. This is for #1050.
- May 21, 2017, by Jianjun Hu:
  First implementation. Created flow source with prescribed mass flow and trace substances, outside enthalpy and composition. Weather bus is used. See #777.

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