The diagram on the right shows a solar water-heating system from a contemporary home. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram represents the working process of a solar water-heating machine for a modern home. The process starts with a solar panel, to which two pipes are attached. One from below has a check valve and drain cock for cleaning. The substance in

this

pipe goes straight to the pump and

then

enters the cylinder part, where a coil is located. At the bottom of

this

section, there is a hole where cold water goes in, after that it is getting hot by the coil and flows from the opening on the top and becomes domestic hot water. The coil from the cylinder part continues its way and reaches an overflow vent, where a water tank is

also

placed. Following that, the pipe goes back to the solar panel thereby making a circular system.

Overall

,

such

systems can be really useful to protect the environment and go green. The circular systems are very efficient and save energy, especially when

such

machines use only solar power as only external source of power.