This is a model for a differential pressure sensor that can be
enabled or disabled with the Boolean parameter
have_sen. If disabled, the control input variable
y is removed and the model simply consists of two
fluid ports that are not connected to each other and for which the
following equations are used. So the model must still be provided
with pressure conditions at each port.
// Zero flow equations
port_(a|b).m_flow = 0;
// No contribution of specific quantities
port_(a|b).h_outflow = 0;
port_(a|b).Xi_outflow = zeros(Medium.nXi);
port_(a|b).C_outflow = zeros(Medium.nC);