Design of a proportional integral derivative controller of temperature regulated for a nursery

Abstract

This article describes the design and simulation of a proportional integral derivative PID controller that operates a proportional control valve to allow the flow of hot water to the radiant floor of a pig farm to maintain the required temperature. In the development of the project physical and mathematical concepts are required for controlling, the temperature oscillations in the range of 25 °C to 35 °C and the heat flux through the radiating surface of the floor, as well as analyzing the parameters involved for the development of the control system; In the control system design the characteristics and parameters involved in the pigs rearing by means of corral were identified; later the thermal analysis of the heating system integrated into the radiant floor that supplies heat to maintain the temperature was carried out, then the response of the temperature control system was simulated in the Scilab software and finally, the programming of the proportional integrative control was carried out. The design considers using gas generated in a biodigester to transfer thermal energy to the heating water that circulates through the floor, transferring heat to the brood module until it reaches and maintains the desired temperature using a control system that involves a proportional valve program in Arduino. The entire system was simulated by means of software including the gas and water circuits according to the heat transfer flow required to maintain the controlled temperature inside the module. The developed design allows controlling the heat flow to maintain the required temperature, stabilizing the process in 20 minutes.