Important information and facts about solar water heater:
Solar heater for savings, more luxury
Many believe that the solar heater completely obviates other heating sources
This is true to a large extent. When a solar heating system is installed in proportion to the "acual" daily consumption, the savings rate is more than 85%.
An auxiliary heating system is often relied upon as an electric heater most of the time for small capacities less than 500 liters.
It incould be within a central heating system that works on natural gas or diesel.
And the backup system is often relied upon when the sun is not shining, and it is often in the winter season.
There is an important relationship between the yield of hot water between summer and winter.
In the summer there are more hours of solar radiation and the water temperature from the source is "higher" and the nature of customer consumption requires less hot water in summer than in winter.
Quite the opposite of the winter season, where the solar radiation hours are less, the incoming water temperature from the source is less, and the consumption rate is higher.
Here the need for auxiliary heating system is essential.
Some tend to increase the capacity of the solar system in order to cover consumption completely in the "winter", and this is often an unsuitable option.
Because the production of hot water is daily, and therefore there will be a large amount of hot water produced in the summer without use, and thus the system is exposed to a large boil, and thus salts and sediments will form as a result of boiling, and this affects the life span of the system components.
It is always recommended to use the solar system as needed and activate the backup system. The amount of water required is estimated by several factors, the most important of which are:
1- The number of individuals benefiting from the system "permanently" according to the area code, and it is often estimated between 45-55 liters per person per day.
2- The number of bathrooms and the length of the piping network
3- Completely isolating the piping network raises the efficiency of the system by more than 25%, especially when the networks are large (in large, non-insulated networks, the loss may reach 50%)
4- The installation direction of the solar heater must be to the south and at a specific angle of inclination according to the latitude of the area to be installed in. The angle of inclination in Egypt is from 30-40 degrees)
5- In the event that it is not possible to install towards the south, the effect on efficiency must be taken into consideration.
6- The choice of the type of solar system depends on the quality of the incoming water from the source. In the event that the water is produced from desalination water, for example, the reservoir must be of a corrosion-resistant type and be provided with appropriate protection to protect the materials manufactured from it such as the magnesium or aluminum anode, or install of anti-rust and corrosion systems. And calcification on the grid