| Abstrakt: |
In this study, the drying of coffee beans was carried out by the solar-photovoltaic drying method and analysis of the profile of the inlet and outlet air temperatures, solar heat intensity, and air humidity in the photovoltaic-ventilation solar drying. Then the drying, rate, drying, and drying of photovoltaic-ventilation solar drying were also obtained compared with traditional solar drying. The photovoltaic-ventilation solar dryer consists of five main components: a solar panel, temperature control, ventilation fan, and drying chamber. The initial moisture content of the coffee beans was 52% wb and dried to a moisture content between 10 - 12% wb. Coffee beans dry faster when used as a solar drying method compared to the photovoltaic method compared to the traditional method, with drying temperatures of 40°C, 45°C, and 50°C. The final results of coffee moisture content in traditional drying, solar drying based on photovoltaic variables at 40 °C, 45 °C, and 50 °C, respectively, were 11.60%, 11.31%, 10.95% and 10.28%. This is because the higher the drying temperature, the faster the drying process. Then the highest drying efficiency results are in the drying time for the first 60 minutes, which is 10.39% at a temperature of 50°C. The modelling shows that the most efficient drying of coffee beans is the solar drying method based on a photovoltaic temperature of 50°C. [ABSTRACT FROM AUTHOR] |
