thermal exchange power of about 105 kW. The management
system does not satisfy the primary energy requirement for
of the solar system flows have been grant by means of 2
DHW production, a diverter valve directs the pre-warmed
circulation groups with multiple connection, in order to win
water through the plate exchanger feed by the boiler. The
the head losses (localizzate e distribuite) of the solar plant.
boiler integrates the heat need to get DHW at the desired
A precise sizing of the main pipes of 35/32 mm and 28/25 mm and the secondary (interrate) pipes of 22/20 mm, has allowed to contain the head losses and to gain an adequate speed for the correct system working. To have a correct heating fluid flow for the functioning, every solar circulating group have been set to the highest speed in the working range. The solar controller allows the electric management of the circuit, controlling the functioning and with electrical losses reduction, since it makes the fluid circulating only if the collectors are able to exchange a minimum value of solar energy. On the controller have been activated also the protection and cooling functions to protect from temperature peaks, which are very brief due to the DHW requirement. To
temperature at any moment. Every recirculating system is
have an uniform distribution of the head losses related
supplied with another diverter valve, that directs the water
to the project flow of 30 l hour/m2 collector, due to the
of the recycle circuit through the exchanger or the tanks,
distance between the collectors and the tanks. If the solar
depending on the temperature of the return and of the solar tank storage.
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