A system which turns cold water into hot water with the help of heat contained in the Sun's rays is called a solar water heating systems (SHWS)
Around 60o to 90o C. The rise in temperature depends on
Yes, it can be installed on Rooftops, Building terrace, Open ground
There should be : - No shading, - South orientation of the collectors, - Collector Tilt = Latitude or + 10o thereof , - Over head tank with its bottom water outlet at least 8" above the hot water tank of a solar water heating system.
It generates hot water on : -Clear sunny day (Max.), - Partially cloudy day: Moderate,
- Rainy or heavily overcast day -Nil, - Average 300 days in a year (330 days in Gujarat & Rajasthan)
Only soft and potable water recommended - Hard water can reduce efficiency over time & damages collectors
Stainless Steel or copper for small tanks, Mild steel tank with anti-corrosive coating inside for large tanks
Galvanized steel pipes of class B or C are normally used. Copper pipes can also be used. Heat resistant plastic piping, if available, can also be used.
Yes, the best collectors are those with
SHWS can be provided with back up heating system by
- Electrical heater or - Boilers run on furnace oil/fire wood/coal or one bathroom should have elec. heater.
Maintenance is minimal :
-Periodic glass cleaning, -Check for leakages and valve functioning
The chart explains all!