Evaporator and condenser models — Buildings Library User Guide

# Evaporator and condenser models

class `PythonModel.heatexchangers.` `EvaporatorCondenser`(parameters)

  Bases: `object`

  Object for heat exchanger based on epsilon-NTU method for a heat transfer fluid exchanging heat with refrigerant experiencing constant temperature phase change.

  Parameters: | UA – Heat transfer coefficient of the evaporator or condenser (W/K).

  `get_RefrigerantTemperature`(Q_flow, m_flow, flu, T_in)

    Evaluate the refrigerant temperature.

    Parameters: | Q_flow – Heat transfer rate to the fluid stream (W). m_flow – Fluid mass flow rate (kg/s). flu – Fluid model. T_in – Inlet fluid temperature (K).
    Returns: | Refrigerant temperature (K).

    Usage: Type

          >>> import fluids
          >>> flu = fluids.ConstantPropertyWater()
          >>> eva = EvaporatorCondenser([21523])
          >>> '%.2f' % eva.get_RefrigerantTemperature(19300, 0.71, flu, 298.75)
          '305.25'

  `initialGuessParameters`(Q_nominal, P_nominal)

    Initialize guess parameters for calibration of the heat pump model.

    Parameters: | Q_nominal – Nominal heat pump capacity (W). P_nominal – Nominal power input (W).
    Returns: | A list of parameters to the compressor model, a list of tuples of the bounds of the parameters (min, max) for the calibration routine.

  `modelicaModelPath`()
    Returns the full path to the EvaporatorCondenser model in the
      Buildings library.

    Returns: | Full path to the compressor model in the Buildings library.

    Usage: Type

          >>> eva = EvaporatorCondenser([21523])
          >>> eva.modelicaModelPath()
          'Buildings.Fluid.HeatExchangers.EvaporatorCondenser'

  `printParameters`()

    Prints the value of the model parameters.

  `reinitializeParameters`(parameters)

    Reinitializes the evaporator or condenser using new parameters.

    Parameters: | UA – Heat transfer coefficient (W/K).

  `set_ModelicaParameters`(simulator, suffix='')

    Set parameter values for simulation in dymola.

    Parameters: | simulator – Simulator object (BuildinsPy) suffix – String to add at the end of parameter names.
    Returns: | Simulator object (BuildinsPy)