The hot air from the outlet of the drying collector is connected to the inlet of the drying chamber. The fan is attached to the inlet of the drying collector to conduct the forced convection experiment.Fig. 1 Indirect type forced convection solar dryerC. Experimental procedure The broken copra is distributed evenly in the trays and is kept inside the chamber for solar drying. In the designed solar dryer, the air is blown into the vacuum tube collector with the help of the external device fan. As solar radiation falls on the sensor, it heats up and transfers heat to the air flowing through the drying sensor. This hot air enters through the entrance to the drying chamber where the copra is loaded into two trays. The moving hot air evaporates the water content (humidity) of the copra according to the basic mechanism of removing moisture from the surface of the product to the environment, followed by the removal of moisture from the interior of the product towards the surface [4]. The air speed at the platen was adjusted using a control valve. During the experiments, the temperatures at different locations of the solar collector and the drying chamber, the dry and wet ambient bulb