| 摘要 |
<p>PURPOSE:To lessen the loss of radiant heat by controlling power loads to a reference level by a method in which a proper working time of a heater is calculated from the amount of hot water being used and the condition of remaining hot water and the desired hot water is produced. CONSTITUTION:Heat quantity K1 to be stored in a hot water storage tank is calculated by an arithmetic unit A6 from the equation K1=(T1-a)XV[where V is the value l set by a hot water amount setter 4 and T1 is a set temperature deg.C of hot water and (a) is yearly lowest temperature], and the heat quatity K2 of the remaining hot water is calculated by an arithmetic unit B9 from the equation K2=(T2-a)Xv (where v is the amount l of remaining hot water, measured by a remaining hot water amount sensor 7 and a remaining hot water temperature sensor 8 and T2 is the temperature deg.C of remaining hot water). Then, a desired electrification time H is calculated by an arithmetic unit C10 from the equation H=(K1-K2)divided by Wdivided by 860 (where W is consumed power KW of heater and 1kwh=860cal). By using these values thus obtained, the desired hot water is produced.</p> |
