3.1.1. Direct solar drying, DSD3.1.1.1. Weather conditions. Fig. 5 show the change in climatologicalparameters during the test day of April 9th. As can be seen, a maximumof solar global irradiance of 1000 W/m2 was achieved, with the averagemaximum values ranging between 950 and 990 W/m2. The minimumvalues of the ambient temperature were between 22.0 °C and 27.7 °C,while the maximum measured average values were between 29.0 °Cand 33.3 °C. Concerning the relative humidity, the minimum valueswere between 18.11% and 29.2%, and the maximum values werebetween 32.65% and 50.0%.