solar water heater< with Thermosyphon

These systems are composed of solar collector, storage tank, expansion tank and other accessories .

This solar thermal system consists of 2 essential elements:

o The solar collectorprovides power throughout the day, this is due to the greenhouse effect occurs when solar radiation reaches the absorber heat emitting radiation. This radiation is maintained by an opaque glass which means that the collector absorbs radiation and emits very little .
o The storage tank is where the energy throughout the day in the form of hot water. The deposit is thermally insulated and has auxiliary support - electrical resistance .

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The operating principle in the solar system with thermosiphon is based on the following:

the solar radiation is focused on causing the heating of the collector thermal liquid comprising water and antifreeze;
Heat is transferred to the fluid flowing through the tubes constituting the solar collector;
The heated liquid is less dense than the cold water, then hot water rises and circulates in closed loop through the coil heat tranfere tank, the water accumulated therein by heating it;
the heat exchanger transmits heat energy contained in the flowing water for consumption which is on deposit;
the thermal fluid is denser, cools and descends thus causing a circulation natural, or also called thermosiphon.

There is an electrical resistance controlled by a thermostat , which provides support when energy is cloudy or overcast days or greater needs for solar hot water.

Split pressurized solar water heater

In situations where it is not feasible to place the fuel tank above the top of the collectors and for large systems it is usually necessary to use pumps to move the fluid electrocirculadoras heat. The pump can be controlled by an automatic control system (charge differential).

The control system (Differential Drive) is adjusted so as to put the pump as soon as the temperature difference (Tout - TDEP) between the collectors and the tank is 5ºC.

These systems are composed of solar collector , storage tank , pump electrocirculadora , differential controller , trap , expansion vessel and other small accessories .

The essential elements of this type of solar thermal system are:

The solar collector provides power throughout the day , this is due to the greenhouse effect occurs when solar radiation that reaches the absorber heat emitting radiation . This radiation is maintained by an opaque glass which means that the collector absorbs radiation and emits very little .
o The storage tank where the energy stay throughout the day in the form of hot water. The deposit is thermally insulated and has auxiliary support - electrical resistance.
The circulating pump allows circulation of the fluid thermal collectors to the tank .
The differential command that controls the pump through the differential temperature on the collector probe and probe in the tank.

The operating principle in the solar system with thermosiphon is based on the following:

the solar radiation reaches collector causing heating of the thermal liquid comprising water and antifreeze;
Differential charge pump commands start the pump when the temperature of the probe manifold is higher than plus or minus 4°C;
the deposit is crossed by the heat transfer fluid passing through the heat exchanger;
the tank is fed by cold water is replenished by drinking water that heats;
charge pump differential orders for the pump when the temperature differential of the pump is lower than programmed, for example, when the temperature difference is less than 4°C.

There is support in this system energy (electrical or boiler) for days with less sunshine or bigger needs for solar hot water.