Collect. Czech. Chem. Commun. 1982, 47, 430-445

Temperature control in a chemical reactor through variable area of the heat transfer surface. Simulation analysis

Josef Horák and Zina Valášková

Department of Organic Technology, Prague Institute of Chemical Technology, 166 28 Prague 6


An algorithm has been developed and on a mathematical model analyzed to stabilize the reaction temperature of a batch reactor. The reaction has been a zero-order one and the reactor has been operated in a instable operating point. The action variable is the heat exchange surface whose area is increased if the temperature is above, or decreased if the temperature is below the set point. The following two-point regulators have been studied: An ideal relay, a relay with hysteresis and an asymmetric PD relay. The effect has been discussed of the parameters of the regulators on the quality of regulation. Stability analysis has been made of the stationary switching cycles and the domains of applicability have been determined for individual regulators with respect to the rate of change of the area of heat exchange surface.