Patent ID: 7917252

Claim:
A load controlling device comprising: a processor and storage device, said load controlling device further comprising: an information acquiring portion for acquiring an amount of main electric power indicating an amount of electric power for an entire unity using electric power, fuel cell operation information indicating an operation state of a fuel cell main body that supplies electric power and thermal energy, device operation information indicating an operation state of a device consuming at least one of the electric power and the thermal energy, and control condition information indicating a control condition for each device; a post-control electric power amount data generating portion for generating plural pieces of running control information each indicating a changeable running method for each device on the basis of the control condition information acquired by the information acquiring portion, and generating plural items of post-control electric power amount data each indicating the amount of main electric power for every specific time obtained in a case where the running method of the device is changed in response to the plural pieces of running control information on the basis of the amount of main electric power, the fuel cell operation information, and the device operation information acquired by the information acquiring portion; a post-control hot water storage amount data generating portion for generating plural items of post-control hot water storage amount data each indicating an accumulated amount of hot water for every specific time generated in a case where a fuel cell generates electric power on the basis of the plural items of post-control electric power amount data generated by the post-control electric power amount data generating portion; a hot water storage amount determining portion for determining whether the accumulated amounts within the plural items of post-control hot water storage amount data generated by the post-control hot water storage amount data generating portion exceed a specific heat capacity; a reduction amount calculating portion for calculating plural energy cost reduction amounts indicating respective differences between plural energy costs, incurred in response to the plural items of post-control hot water storage amount data determined as not exceeding the specific heat capacity by the hot water storage amount determining portion and the plural items of post-control electric power amount data corresponding the plural items of post-control hot water storage amount data, and an energy cost incurred in response to the amount of main electric power before the running method of the device is changed; and a running method determining portion for determining, as the running method of the device, the running control information corresponding to a largest energy cost reduction amount, which is largest among the plural energy cost reduction amounts calculated by the reduction amount calculating portion.