Changed one instance of <code>Modelica.Fluid.Sources.MassFlowSource_T</code>  that was connected to the two fluid streams, to two instances, each having half the mass flow rate. This is required for the model to work with Modelica 3.2.1 due to the change introduced in https://trac.modelica.org/Modelica/ticket/739.
Updated reference result due to changes in example model.