What are the better methods to optimise an hybrid system (solar/gas) connected to the grid?
Dear Nada,
I have a coupled Solar/Natural gas water heating system in my home to produce hot water, which can be used in many a type of application, including floor heating.
The system consists of a solar boiler system with a natural gas heater coupled after the solar boiler system. My house is located in a temperate very variable oceanic/continental climate. Hence, it can be mild with westerly winds, but cold with easterly winds, actually the two main wind directions in Western Europe. The gas boiler is adaptive. When the solar boiler delivers water higher than 50°C the gas boilers does not heat to a surplus temperature. However with cold winter conditions, the solar boiler heats water up to about 30°C. Since that is not hot enough for heating or showering, the gas boiler heats the water additionally to about 60°C. Even under those circumstances one makes a profit since the solar boiler pre-heats the input water of the gas boiler, hence one saves on gas consumption even in winter. During summer there is enough solar energy to heat the water above 50°C continuously. The gas boiler does not operate during late spring, summer and early autumns, hence, about six months. I am very happy with that.
Best regards,
Frank
PS.: Details about this system can be obtained.
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