Hello,

I have found one interesting model of boiler drum on the following web page: http://library.wolfram.com/examples/ANMdrumboiler
As you can see, model is 5th order. I have found out that 5 states are
used:
x1 drum pressure
x2 drum water level
x3 drum water temperature
x4 riser wall temperature
x5 steam quality in %

I don't understand why x3 and x5 are important. How steam quality can be calculated in %. What for example quality of 80% means? I assume that riser represents pipes through which water is supplied to a drum. Have you seen such models? I think this model is too complicated, and variables of the most interest are drum level, drm pressure and perhaps, temperature of drum upper (steam) wall and lower (water) wall.

What do you think?

I have found one interesting model of boiler drum on the following web page: http://library.wolfram.com/examples/ANMdrumboiler

I don't understand why x3 and x5 are important. How steam quality can be calculated in %. What for example quality of 80% means? I assume that riser represents pipes through which water is supplied to a drum. Have you seen such models? I think this model is too complicated, and variables of the most interest are drum level, drm pressure and perhaps, temperature of drum upper (steam) wall and lower (water) wall.

What do you think?