STABLE TEMPERATURE CONTROL SOLUTION FOR MICROBIAL DRYING USING GREEN ENERGY TECHNOLOGIES

Abstract

In this study, a temperature stabilization control solution for a drying chamber is proposed by applying a closed-loop Proportional Integral Derivative (PID) control algorithm integrated via a Variable Frequency Drive (VFD). A laboratory-scale model was fully constructed with multi-mode operation capability under two different energy sources. Experimental results indicated that, with a photovoltaic (PV) power supply, the system reached a target temperature of 45°C after 30 minutes of operation. Meanwhile, when utilizing a hydrogen and oxygen (HHO) gas mixture generated from the water electrolysis process, the system achieved the same temperature level of 45°C after 60 minutes. Once the setpoint temperature was reached, the system operated stably under both modes. This model serves as a practical application of renewable and green energy sources in the field of biotechnology, contributing to raising public awareness about energy transition, promoting clean energy development, and supporting sustainable development goals.