modelSteamTrap

Steam trap with isenthalpic expansion from high to atmospheric pressure, followed by a isobaric condensation process as flashed steam is brought back to a liquid state

Extends from Buildings.Fluid.Interfaces.PartialTwoPortInterface.

Information

The steam trap ensures that only liquid condensate leaves the component, while any flashed steam is returned to a liquid state before discharge. The model assumes a steady state isenthalpic thermodynamic process that transforms water from an upstream high pressure state to atmospheric pressure, followed by an isobaric condensation process as flashed steam vapor is returned to a liquid state. This implementation is consistent with physical valves that vent to the atmosphere.

References

Kathryn Hinkelman, Saranya Anbarasu, Michael Wetter, Antoine Gautier, Wangda Zuo. 2022. “A Fast and Accurate Modeling Approach for Water and Steam Thermodynamics with Practical Applications in District Heating System Simulation,” Energy, 254(A), pp. 124227. 10.1016/j.energy.2022.124227

Kathryn Hinkelman, Saranya Anbarasu, Michael Wetter, Antoine Gautier, Baptiste Ravache, Wangda Zuo 2022. “Towards Open-Source Modelica Models For Steam-Based District Heating Systems.” Proc. of the 1st International Workshop On Open Source Modelling And Simulation Of Energy Systems (OSMSES 2022), Aachen, German, April 4-5, 2022. 10.1109/OSMSES54027.2022.9769121

Parameters

TypeNameDefaultDescription
Modelica.Units.SI.AbsolutePressurepAtm101325Atmospheric pressure discharge state
Modelica.Units.SI.TemperatureTSatBuildings.Media.Steam.saturationTemperature(pAtm)Saturation temperature at atmospheric pressure

Components

TypeNameDefaultDescription
Modelica.Blocks.Interfaces.RealOutputQLos_flowHeat transfer loss rate
Medium.SpecificEnthalpydhChange in enthalpy

Revisions

  • September 15, 2023, by Kathryn Hinkelman:
    Added publication references.
  • March 2, 2022, by Kathryn Hinkelman:
    First implementation.