Controlled Mass Flow Rate Source (2P)

The volume of liquid in the source is considered negligible and is ignored in the model. There is no accumulation of liquid between the ports, so the sum of all mass flow rates entering the source should be zero.:

where — mass flow rate at the source through the appropriate port.

If for the parameter Flow rate type the value is set Volumetric flow rate, then the mass flow through port A is calculated based on the volume flow:

where

By default, the source maintains the set flow rate by performing isentropic work on the incoming liquid, although the block provides the option to ignore this term. If the model takes into account the speed at which the source performs work, then it is equal to the sum of the energy flows through the ports.:

where — the flow of energy to the source through the port or through work. The energy flow due to work is equal to the power generated by the source. Its value is calculated from the values of the specific total enthalpy at the ports:

Specific total enthalpy defined as

where

The value of the specific internal energy is determined taking into account the fact that the work performed by the source is isentropic. Then the specific entropy, which is a function of the specific internal energy, should have the same value at ports A and B:

where — specific entropy. If the check box is Isentropic power added removed, the specific total enthalpies in the ports have the same value ( ), and the work done by the source is zero ( ).