IMPROVING THE PERFORMANCE OF TEMPERATURE CONTROL LOOP IN A CRUDE OIL REFINERY THROUGH THE DIGITAL SIMULATION TECHNIQUE
The International Conference on Applied Mechanics and Mechanical Engineering
Due to the rapid growth in digital control•technology because of their • : great advantages,it now possible to consider implementing a digital prog-• rammable controller for many industerial processes.In this paper some _ • software aspects of digital controllers for temperature control loop in • crude oil refineries have been discussed and a new method has been developed for rapid tuning of these controllers'parameters through the implementation of digital simulation technique:Different
... ue:Different structures of the control loop have been investigated with main emphasis is given to casca-• ded and feedforward/feedbackward loops.Cascaded'structures is shown to :reduce the effect of the time delays and yield better dynamic characteristics for the control loop.Preview of the future system disturbance inputs through the feedforward path is shown to be effective to improve the • performance of the overall control system.The results of the present inv-• :estigation indicate that the proposed method is capable to detune the parameters of each controlling action either on-line or off-line with substantial improvement in the dynamic -performance -of the control loop.Illus: .trative examples as well as practical applications are also included. * Engineering Office,Cairo Oil Refining CO., Mostorod,Egypt.