solar water heater is good device to get heated water for using in many application like getting steam for a power plant .
Dear Dr Abass
The maximum water temperature depends on many factors as:
1- the solar heater collector area.
2-The solar heated materials and technology.
3- The solar intensity during the day
4-The solar air temperature and the ambient temperature.
As an example: for hot countries which their ambient air temperature about 10 degrees with solar intensity of 300 w/m2 and for 2 square m collector the most worm water degree can be achieved do not exceed 70 degree centigrade.
Regards
It is up to the pressure level of your system I think. If the solar system is operating at about 1 atm., than the system cannot exceed 100 C. But, if the operating pressure increased than the temperature may reach quite more than 100 C .
To handel a steam at high temperature and pressure , you should use a pressurized evacuated tube solar collector with solar concentrator.
Dear Dr Abass
The maximum water temperature depends on many factors as:
1- the solar heater collector area.
2-The solar heated materials and technology.
3- The solar intensity during the day
4-The solar air temperature and the ambient temperature.
As an example: for hot countries which their ambient air temperature about 10 degrees with solar intensity of 300 w/m2 and for 2 square m collector the most worm water degree can be achieved do not exceed 70 degree centigrade.
Regards
Dear sir Miqdam I agree your answer and i can added the wind velocity and the insulation of the heater and type of glass cover .
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