Controle de umidade baseado na carta psicrométrica para cabines de pintura

Abstract

The physical-chemical phenomena that involve the application of automotive paint are very sensitive, requiring strict control of the factors that influence them. any parameter out of specification is expressed in the form of application problems. a problem of excess of crater in the painting at certain times of the year was evidenced in the line of context painting of this work. After brainstorming and drawing up a diagram of ishikawa, the possibility of the air conditioning causing this effect was considered once that the state of the outside air varies throughout the year. Upon investigation it was discovered that the house of air that feeds the painting cabin does not have humidity control or infrastructure for this, allowing the variation of the humidity inside the painting booth. It was found that the limitations that the available infrastructure of actuators (heat exchangers and water sprays) would offer to perform humidity control would allow it to be implemented, but to a limited extent. It was noted, then, through the analysis of the output of the system, that the set has the capacity to execute the specified, it was enough to implement a control. It was then proposed the implementation of a humidity control based on expert knowledge, the psychrometric chart, to perform its function.