Desenvolvimento de um módulo de controle de temperatura da água usando PID

Abstract

The production of homemade beer has grown significantly in recent years and, along with that, the need for equipment to standardize this production. The mashing stage, which consists of cooking the cereals with water at previously defined temperatures and time intervals and, subsequently, at the boiling point, plays a fundamental role in this production. Modules responsible for automatically controlling the water temperature are commercialized, however they are expensive. The focus of this work is to design, develop and test a low-cost didactic module, capable of controlling the water temperature using the PID control method, making its use viable in the beer mashing stage. For this realization it is necessary to discover the parameters 𝑘𝑃, 𝑘𝐼, and 𝑘𝐷 from the adjustment of the experimental data, these parameters will be used in the algorithm implemented in the C/C++ language, responsible for the temperature control of the prototype. The tests showed that the prototype is functional, being able to control the water temperature within a margin of error of approximately ± 1°C, even if affected by disturbances that alter the controlled variable.