The diagram illustrates the structure and function of a basic solar panel used for heating air and water.
Overall, the solar panel consists of a box with an inlet and an outlet and is covered by transparent glass on top. Solar energy is absorbed within the box to heat the air or water that flows through it.
In the first process, air is heated. Cool air enters the box through the inlet on one side. As sunlight passes through the transparent glass, it warms the air inside. The warm air then exits through the outlet on the opposite side of the box.
In the second process, water is heated. In this case, water enters the box through the inlet, passes through a coiled pipe inside the box, and then exits through the outlet. The sun’s rays heat the water as it travels through the pipe, and the warm water flows out through the outlet.
