The solar energy is the most capable of the alternative
energy sources. Due to increasing Demand for energy
and rising cost of fossil type fuels (i.e., gas or oil)
solar energy is considered an attractive source of
renewable energy that can be used for water hearing in
both homes and industry. Heating water consumes
nearly 20% of total energy consumption for an
average family. Solar water heating systems are the
cheapest and most easily affordable clean energy
available to homeowners that may provide most of hot
water required by a family.
Solar heater is a device which is used for heating the
water, for producing the steam for domestic and
industrial purposes by utilizing the solar energy. Solar
energy is the energy which is coming from sun in the
form of solar radiations in infinite amount, when these
solar radiations falls on absorbing surface, then they
gets converted into the heat, this heat is used for
heating the water. This type of thermal collector
suffers from heat losses due to radiation and
convection. Such losses increase rapidly as the
temperature of the working fluid increases.