Automation of temperature sensor in biogas production from palm oil mill effluent (POME)

Abstract

The purpose of this research is to obtain the monitoring system and temperature data recording a system based on National Instruments USB-6001 and to obtain a Human Machine Interface (HMI) which is suitable for monitoring the temperature process of the conversion POME into biogas on a laboratory scale using LabVIEW software. This study was conducted by two stages, hardware design and software design. In hardware design, a stirred tank and a PC were connected to the microcontroller hardware National Instruments USB-6001. The software design was consisted of the LabVIEW programming. The results indicated that the components were suitable for the monitoring process of the conversion POME were the National Instrument USB - 6001, series TC module to DC and 5 volt power source, as well as a temperature sensor used is a thermocouple type K. For HMI design using LabVIEW 2014 was in accordance with the needs with the graphic display of temperature conditions in real time from a stirred tank and the data logger was automatically stored in the Microsoft Excel. After completion of the design of HMI, thermocouple that is used is calibrated to obtained a linear equations of analog data versus temperature data from a digital thermometer so that the equation to be inputted into the program LabVIEW block diagram which was y = 0.0064x + 0.2217 with R2 value was 0.993. Afterward, the research was continued using a set point 55 ° C with a variation of hysteresis 1, 3, and 5°C. Data was obtained from this study then to be calculated the standard error values to compare the data generated from every variation of hysteresis. The results indicated that the best data on research was the data obtained using hysteresis 1°C from the set point temperature compared with the data on the hysteresis 3 and 5°C.