Kinetic Behavior of Mono-tube-boilers

Abstract

The kinetic behavior of a mono-tube-boiler is very important for its control. Since the controlled variables of a boiler (pressure, temperature) are the complicated functions of enthalpy and distributed along the tube length, the kinetic analysis is not easy. In this paper, the author analyses it, supposing that the temperature is distributed but the pressure is lumped in the tube. The results are illustrated by a numerical example which represents the transient response for the stepwise change of fuel, feed-water and steam demand. He also applies them to the evaluation of the automatic control systems for mono-tube-boiler.