Abstract
A simple, continuous, energy-blending process is analyzed to attain an understanding of its dynamic performance when the flow rate of either the hot or cold fluid is time variant. A linearized analysis based on small changes of all variables is employed to estimate the static and dynamic performance of the process when simple controllers are used to regulate temperature of the out-flowing mixture. Possible advantages are indicated for the use of nonlinear flow versus stroke characteristics of the flow-control valve together with its connecting lines. Graphical analyses show the performance of various control schemes when the system variables undergo large changes and indicate how valve characteristics may be chosen for the blending process under control.
