function m_MeOH_bias=Bias_calc(u)

%Input parameters:
x_MeOHsp    =u(1);  % current x_MeOH set point
mair_max    =u(2);  % air= mass flow of air (kg/h)
MW_MeOH     =u(3);               %32.04 g/mol
MW_air      =u(4);                %28.9647g/mol

m_MeOH_bias =(MW_MeOH/MW_air)*mair_max*(x_MeOHsp/(1-x_MeOHsp));


end 