The diagram illustrates how a solar panel is used to generate warm air and water. Overall, both processes rely on sunlight to increase the temperature of either air or water, with the main difference being the presence of a water pipe in the second method.
In the first method, the solar panel consists of a box with a transparent glass cover. When sunlight passes through the glass, it heats the cool air that enters through an inlet. As a result, the air inside the box warms up before being released through the outlet.
For water heating, a coiled pipe is placed inside the box to allow water to flow through it. Initially, cold water enters through the inlet, and as sunlight penetrates the glass cover, the water inside the pipe absorbs heat. Eventually, the warmed water exits through the outlet and is ready for use.
Overall, both systems operate using solar energy, but the water heating process requires additional piping to facilitate heat transfer.