Solar water heaters have turned now to a developed technology that is capable of replacing the other conventional water heating methods such as electric water heaters. The market for solar water heaters is expanding internationally, including Egypt that is supplied with abundance in solar energy for all communities with cheap cost and safety way.
Main Components of Solar Water Heaters
The solar water heater comprises of:
- Solar collector.
- Insulated tank.
- Connecting pipes and other essentials instruments such as i.e. pumps and valves.
- Controller unit.
Evacuated tubes technology:
The evacuated tube collectors considered the latest technology in the world for water heating fields. Solar evacuated-tube collectors, on the other hand, contain rows of tubes which are constructed by encasing absorber tubes inside transparent glass tubes. The air in the space between the two tubes is removed to create a vacuum, which prevents convective or conductive heat loss.
Heating water using free fuel i.e. solar energy, thus recovering the initial costs within 1 – 2 years.
The solar water heaters can be installed with almost no adjustments to roof structure; there are a big range of residential systems, using a variety of technologies for almost any house to suit all preferences.
Various installation positions and integration with the buildings.
Water is easily heated to a temperature of 65 – 99°C in summer and winter as an average.
Solar water heaters of 200 – 300 – 360 – 420 liters capacity are suited for domestic use.
It eliminates the emission of carbon dioxide making it environment friendly.
Intelligent controller units with lots of functions to achieve automatic controlling of water level to suit the client’s requirements.
The controller unit enables the client to easily monitor the water level and temperature through its integrated display.