Experimental data aquisition of the U-LEAF Linear Fresnel Collector of the Cyprus Institute

**Experimental data set** Experimental_Data.mat file contains the experimental data for 50+ days of operation. This is a structure file (.mat) type to be opened with Matlab of equivalent. The data set is divided in several arrays: Date: Year, Month, Day, Hours, Minutes, Seconds Solar position: Azimuth of the sun, Elevation of the sun calculated based on NOAA algorithm Incidence Angle Modifiers: calculated from ray tracing software (Tonatiuh) DNI as measured by the pyrheliometer Weather station: Ambient Temperature, Pressure, GHI, Humidity, Wind velocity Reflectometry as measured several time per week and interpolated in between Absorber: Inlet, outlet and average temperatures in the absorber Heat transfer Fluid: Cp, Density, Massflow, Power absorbed Tracking status: ON/OFF **Machine learning** The X_train.csv, Y_train.csv, X_test.csv and Y_test.csv are files used to train the models and to test them. X files contain DNI, mass flow, inlet temperature, IAM and humidity. Y files contains the output powers. Data are normalised between 0 and 1 while zero values have been removed.