Desarrollo de un sistema de medición de masa con control de temperatura en cámaras de secado de biomateriales del CDTS

Abstract

CONDITION FOR PUBLICATION OF PROJECT. This work describes the construcBon, automaBon, and validaBon of a diffusion-based drying chamber with temperature control, designed to study the behavior of biomass during drying processes. The system integrates an ESP32 microcontroller responsible for data acquisiBon and PID temperature control, a helical resistance coil as the heat source, and a fan to generate forced airflow. The chamber incorporates PVC tubes, equipped with SHT31 humidity sensors and supported by a balance designed with strain gauges, allowing real-Bme recording of variaBons in mass, humidity, and temperature. The validaBon procedure consisted of exposing a sample of known mass (reference mass) to a target temperature (setpoint) and recording the variables to validate the system’s performance. Preliminary results showed that the PID controller maintained the temperature within acceptable margins, and the monitoring of the reference mass followed the expected trend, remaining constant during the test period. It is concluded that the proposed system consBtutes a highly applicable pla[orm for educaBonal and research purposes, successfully controlling the criBcal variables required for studying mass and heat transfer mechanisms in biomass drying. Keywords: Biomass drying, PID control, sensors, traceability, metrology, humidity.