FPC SOLAR WATER HEATER BY SUNSTELLAR

Solar Water Heater is a renewable energy device which uses Solar Thermal Energy to heat water which save electricity and thus money; electricity is becoming more and more expensive and its availability is becoming unreliable;

• Solar water heaters are non-polluting.
• Solar water heaters are safer than electric geysers as they are located on the roof.
• Solar Water Heater gives hot water 24 Hours a day .

• A typical domestic solar water heater consists of a hot water storage tank and Solar Collector of either Flat Plate Type (FPC) or Evacuated Tube Type (ETC).
• The collectors are installed facing the sun – South direction to allow solar radiation to come in.
• Water is heated because of high absorptivity of solar collectors.
• Heated water is collected in the tank which is insulated to prevent heat loss.
• Circulation of water from the tank through the collectors and back to the tank continues automatically due to density difference between hot and cold water (thermosyphon effect).

• TEAM Stellar identifythe appropriate Collector Area required for Solar Collectors which results in fast heating of water.
• Collector used in Stellar Solar Water Heaters are made with BIS Complied raw material and are technologically advanced .
• Stellar Solar Water Heater customisses the Hot Water Tank as per water condition in your area which results in maximum life of system
• Stellar Solar Water heaters uses Robotic and Automatic Production process to manufacture best in class systems.
• Stellar Tanks are insulated with high density PUF Insulation to ensure minimum heat loss during night and winters.
• Stellar Solar Water Heater Systems are mounted on best in class heavy duty Steel Structure which prevent any damage in high winds .

It is Always better to buy a solar water heater of the right capacity in consultation with an expert or Stellar Channel Partner or Design Engineer. Usage of Hot Water vary on many factors.For on an average indianhousehold , System Capacity should be 40-50 Liters per member of a Family and 50-75 litres for Kitchen per day . So for a family of 4-5 Persons, System Capacity suggested is 300 LPD.

• The basic requirement for functioning of a solar system is availability of unobstructed sunlight for the whole day.
• Typically, domestic solar water heating systems are installed on the roof of the house.
• The collectors of the system have to face the sun and hence should be oriented due south for maximum interception of sunlight. Thus there should be no obstruction to sunlight in the south, west and east directions in that order of preference (an arc of about 120 °, 60° both sides of the southern direction should ideally be shadow free).
• As a thumb rule, the requirement of shadow free area is around 3 sq. m for each 1 x 2 m collector used.
• It is best if the area is flat, away from rain water drains and as far as possible, close to the bathrooms where hot water is to be supplied.
• Cold water should be available at the height of around 2.5 m from the base of the system.

• It consists of an absorber plate which is coated on its sun facing surface with an absorbent coating, also called selective coating.
• The absorber consists of a grid of metallic tubes and sheets. Water flows through the tubes. Sheet absorbs the solar radiation falling on it and transfers it to water.
• The absorber plate is placed in a top open box to protect it from weather. The space between back and sides of the absorber and the box is filled with insulation to reduce heat losses. The front of the box is covered with a high transmittance glass plate.
• Flat plate collectors are specified on the basis of their area and are of commonly 1x2 m size.

• ETC Stands for Evacuated tube Collector .
• ETC Collectors are the most efficient solar Thermal Collectors used for heating water .
• ETC Collectors are made of two borosilicate glass tube with inside coating of Copper and Alloy and outside black color coating . The Second glass tube is used to create vacuum insulation so that heat is trapped inside the inner tube and there is no heat loss to environment .
• ETC Tubes comes in 2 Popular sizes – 58 MM Dia and 1800 MM Length and 58 MM Dia and 2100 MM Length .Each Tube is Capable of Heating 10 – 15 Liters of Water in one Day .

• The heating of water by the solar water heater will obviously be affected.
• If it is so cloudy that energy received from the sun is almost zero, the output of solar collectors also will be nil.
• On partially cloudy days some output can be expected.
• But, the system can be designed with a suitable electrical back up heater to take care of hot water demand on cloudy days.

Depending on the Usage and geography Electricity saved varies . A standard 100 LPD Solar Water Heater System can save 2-3 Units of Electricity Each Day . Normally Solar Water Heaters can recover its Cost within 3 Years .

• Domestic solar water heating system does not require significant maintenance. Occasional leakages in the plumbing could be easily repaired by common plumbers.
• In case quality of water is hard, scale deposition in the collectors may result over the years. This may require descaling with acids for which it is best to contact the suppliers.
• Broken glass may also have to be replaced by the suppliers.
• If outside exposed surfaces are painted, the paint may have to be redone every 2-3 years to prevent corrosion of the surfaces.