Controle de CO₂ em câmaras frigoríficas com aplicação de controlador lógico programável

Abstract

This study aims to implement and analyze an automated system for CO₂ control in a small-scale potato cold storage chamber, using a programmable logic controller (PLC) and a CO₂ sensor to regulate storage conditions. The research adopts a mixed approach, combining qualitative and quantitative methods. In the practical phase, a CO₂ concentration monitoring and control system was developed, based on parameterizable limits, operated by a PLC. Experimental tests were conducted considering variables such as thermal insulation of the environment, human presence and temperature. Despite limitations in the insulation of the prototype, the results demonstrated that adequate ventilation and parameterizable control of the CO₂ flow contribute to the optimization of energy consumption and the improvement of storage efficiency.