| 摘要 |
<p>PURPOSE:To use a capacity of the title heater in correspondence with the actual use at the user side and to control a unified condition of a plurality of hot water storage type electrical water heaters under a central control device by a method wherein a required energization time to be applied to the heaters is calculated in response to the actual use of hot water at the user side and the expected water volume of use for tomorrow to be fed from the input device. CONSTITUTION:A memory device 12 stores actual data for several days HG for the energization time performed by an energization time measuring device 16 for each of the patterns fed to the input device 17 as data. The energization time calculation device 13 calls for the maximum value HGmax in the data stored in the memory device 12, multiplies the constant C with respect to the rate of surplus, for example, and then calculates the energization time Hs(Hr) as Hs= HGmaxXC. The central control device 200 accepts the data of desired time from the energization time calculation device 13 of the electrical water heaters 100A-100N and distributes each of the energization starting times in such a way as a load is uniformed for the entire electrical power supplying time period at midnight.</p> |
