Outlet model of coaxial vacuum tube solar collector on ethanol distillation

This research discussed the regression model of the outlet level volume of coaxial vacuum tube solar collector used for ethanol distillation. The vacuum tube solar collectors generate a heat up to 80°C. The ethanol distillation process requires a temperature level of 79°C only. To gain the best data, the experimental research was carried out. The methods to obtain the appropriate model were Origin Pro 8 and data triangulation. The results revealed the best regression equation is the Power model. The dependent variable is the pressure level of vacuum tube solar collector cavity, and the independent variable is ethanol as the outlet level volume, and It presented the model with radiation intensities of 782 W/m2, 878 W/m2, and 998 W/m2.