This driver allows to study a fairly complex problem, that of the adaptation of a steam power plant to changes in temperature of the coolant or in the maximum pressure of the cycle.

In this example, the various components are coupled by non-linear equations:

• First, the condensing pressure is set by the heat balance of the condenser, phase change exchanger, which sets the saturation temperature;

• The turbine sets the steam flow-rate (depending on the expansion ratio and the upstream pressure, as well as its rotation speed if we take it into account).

The main parameters of the steam power plant, namely the pressure levels and flow-rate, are set by several components strongly coupled whose calculation cannot be done independently.