Power of solar energy

Solar water heater

Solar heating is a system that captures the sun's radiation to heat water very economically
and efficiently. Solar radiant heat is an energy that is emitted by the sun. Ii is free renewable source of energy that does not cost anything to heat water. A system with efficient collector and matching system can save approximately 50 - 60% of energy demand for domestic hot water heater. There are two types of solar heating
system.
(i) Thermosyphon system (Natural circulation, (ii) Pressurized or pumped (Forced
circulation system)
The basic components of solar water heater are
(i) Flat plate collector, (ii) Storage tank. (iii) Return tube
In most of the household system, natural circulation type solar water heater is used L.
this system circulation of water occurs due to natural convection or thermosyphonie A
the water is heated its density decreases and hot water rises and flow into the top of the
storage tank. Colder water from the bottom of the tank having higher density enters the
lower part of the collector. The difference in densities of hot and cold water provides a
driving force for the circulation of water. Hot water is drawn from the top of the tank
The bottom of the tank is placed 1.0 feet above the collector