The diagrams illustrate the structure of a basic solar panel and demonstrate how it can be used to heat both air and water.
Overall, it is clear that the solar panel traps heat through a transparent top, and this heat is then transferred to either air or water, depending on the intended use.
To begin with, the first diagram depicts the simple construction of a solar panel. It consists of a rectangular box with a transparent top that allows sunlight to pass through. Furthermore, heat energy enters the box through this transparent layer, warming its interior. An inlet and outlet pipe are attached to the sides of the box, enabling air or water to flow through. Moreover, in the second diagram, the solar panel is used for heating air. Cool air enters by the inlet on one side of the box. In addition, this warm air then flows out through the outlet on the opposite side.
The final diagram explains how the same panel can heat water. Additionally, in this version, a coiled water pipe is placed inside the box. Subsequently, cool water flows into the panel through the inlet pipe and travels through the coiled tube. As the sun’s rays heat the box, the water inside the pipe gradually becomes warm. The heated water then exits through the outlet pipe.