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ITALIANO
INSTALLAZIONE
CORRETTO DIMENSIONAMENTO ACCUMULO
L’installazione della caldaia prevede sempre il collegamento all’impianto di un accumulo inerziale (volano termico),
costituito da un serbatoio di accumulo, con isolamento termico, in cui circola l’acqua riscaldata dalla caldaia.
Questo permette di assorbire rapidi aumenti o decrementi di temperatura, elevando l’autonomia dell’impianto a
regime.
Nella caldaia a legna il combustibile non può essere dosato come in una caldaia a pellet, gas, gasolio, quindi una
volta caricato deve essere consumato in un’unica soluzione. In funzionamento a regime di modulazione la potenza
minima erogata è maggiore del 30% rispetto alla potenza termica nominale quindi è necessario installare un accumulo
inerziale correttamente dimensionato secondo la seguente formula:
Vsp = 15TB x QN(1-0,3QH/Qmin) (in litri)
Dove:
Vsp è il volume dell’accumulo in litri;
QN è la potenza nominale della caldaia in kilowatts;
TB è il periodo di combustione in ore;
QH è la potenza media richiesta in kilowatts;
Qmin è la potenza minima della caldaia in kilowatts.
Supponendo quindi (es. con 35kW):
QN potenza nominale caldaia = 31,3 kW;
TB periodo di combustione = 3 ore;
QH potenza media richiesta = 25kW;
Qmin potenza minima caldaia 80% nominale = 24,5kW.
Vsp = circa 980 litri
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