The concept of smart cities and smart homes has caught up recently. A smart city or home would be incomplete without it harnessing the benefit of Solar Energy. Solar products reduce our carbon footprint dramatically and work towards sustainable living for our future generations. So, the need of the hour is a Solar City or Solar Home.
Energy saving is a key aspect of a Smart Home. Solar water heating systems use the sun’s inexhaustible energy to heat water and stop the harmful emissions caused by conventional heating of water. Also, it saves electricity bills as solar water heaters reduce the need for conventional water heating by about two-thirds. Additionally, solar heaters pay for their installation within 5 years with electricity savings.
Component s of Solar water heating system
Solar water heating systems can be primarily divided into two components: a solar collector and an insulated storage tank. Both are connected to each other. The solar collector is usually a thin, black plate installed on a rooftop. Beneath this plate water runs through small tubes and is heated by the sun’s rays. The hot water then flows into the tank. The Hot water stored in the tank can be used for various purposes.
Types of solar water heaters
Flat Plate Collectors (FPC)
Flat Plate Collectors consist of an insulated outer metallic box covered on the top with a glass sheet. The inside consists of blackened metallic absorber (selectively coated) sheets with built in channels or riser tubes to carry water. The absorber absorbs the solar radiation and transfers the heat to the flowing water.
Evacuated Tube Collectors (ETC)
Evacuated Tube Collectors are made of double layer borosilicate glass tubes evacuated for providing insulation. The outer wall of the inner tube is coated with selective absorbing material. It absorbs the sun’s radiation and transfers the heat to the water which flows through the inner tube.
Advantages of Solar Water Heaters