公开(公告)号：US10808947B2

公开(公告)日：2020-10-20

申请号：US15533675

申请日：2015-11-06

Applicant: HITACHI, LTD.

Inventor： Tsutomu Kawamura ,  Kaoru Kawabata ,  Ryousuke Nakamura ,  Hiroshige Kikuchi ,  Susumu Ikeda

IPC: F24D11/00 ,  F24F11/89 ,  F28D20/00 ,  F24F11/47 ,  F24F11/30 ,  F24D19/10 ,  F28D19/00 ,  F24F140/60 ,  F24F130/00 ,  F24F130/10 ,  F24F110/10

Abstract: A heat source system managing device includes: a predicted heat demand upper limit calculating unit configured to calculate a predicted heat demand upper limit by adding a prediction error to a predicted heat demand value for a heat source system; an operation plan preparing unit configured to prepare an operation plan of the heat source system to supply heat of the predicted heat demand upper limit to a consuming facility; a surplus stored heat quantity calculating unit configured to repeatedly perform a process of calculating a surplus stored heat quantity by subtracting a heat quantity consumed by the consuming facility from the predicted heat demand upper limit; and an operation plan changing unit configured to sequentially change the operation plan by decreasing a future operation rate of a refrigerator to cancel the surplus stored heat quantity.

公开(公告)号：US10600135B2

公开(公告)日：2020-03-24

申请号：US15577063

申请日：2016-03-22

Applicant: Hitachi, Ltd.

Inventor： Michiki Nakano ,  Susumu Ikeda ,  Yu Ikemoto ,  Takashi Fukumoto

IPC: G06Q50/06 ,  H02J3/14 ,  H02J3/38 ,  G05B13/02 ,  G06Q10/06 ,  H02J3/00 ,  H02J13/00

Abstract: To minimize the amount of calculation for changing an operation schedule even when there is an increase in the number of sites. A management computer calculates a first total schedule value, which is the total of the schedule values for each of the sites within a first time frame. If the first total schedule value exceeds a first target value set in advance, the management computer: calculates a first excess amount of the first total schedule value in relation to the first target value; selects, as a first site, a site subjected to a change in a demand schedule from a group of candidate sites satisfying a candidate criterion set in advance from among a plurality of the sites, the selection being performed on the basis of information on the facility characteristics for each of the sites; changes a first demand schedule of the first site in the first time frame; and transmits the changed first demand schedule to a control device of the first site.