Projecto de sistema de controlo centralizado de temperatura de caldeira de fluido térmico com PLC para Fasorel

Abstract

The Professional Internship is a form of completion of the course at the Faculty of Engineering at Eduardo Mondlane University. The present work presents the project to improve the thermal fluid boiler at Fasorel, if that was presented during the internship period. The case study focused in the design of a fluid boiler centralized temperature control system thermal with PLC. This proposal presents the control loops as a function of the temperature of the fluid for the Burner. Regarding the combustion control performed by Burner, the ties of control in place for this purpose are considered to adequately comply with its function of maintaining safe combustion. The proposed control system loop acts on the electrical power supply of the Burner controlling the on, off and its normal operation, and has applications to interact with the user, allowing him to visualize the state of the process in full operation, configure the temperature limits for the three sensors installed in the boiler (fluid forward, fluid return and stack sensor) of the process thermal and record information from the same process. The results obtained through a simulation carried out at temperature control, using the TIA PORTAL program, demonstrated the applicability and advantages of implementation of the proposed control loops (TRADUÇÃO NOSSA).