Hitachi, Ltd.

Hitachi Plant Technologies, Ltd.

Hiroshige Kikuchi

Koji Watanabe

Kenichi Nakashima

Takumi Sugiura

Yasuhiro Kashirajima

Tadakatsu Nakajima

Keiji Sasao

Tsutomu Kawamura

Ryousuke Nakamura

Kaoru Kawabata

Susumu Ikeda

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.

Heat source system managing device, heat source system managing method, and program

In a cooling system for an electronic device of the present invention, server rooms in which a plurality of servers are placed, an evaporator which is provided close to each of the servers, and cools exhaust air from the server by vaporizing a refrigerant with heat generating from the server, a cooling tower which is provided at a place higher than the evaporator, cools the refrigerant by outside air and water sprinkling, and condenses the vaporized refrigerant, and a circulation line in which the refrigerant naturally circulates between the evaporator and the cooling tower. According to the cooling system, an electronic device which is required to perform a precise operation with a heat generation amount from itself being large, such as a computer and a server, can be efficiently cooled at low running cost.

Cooling system for electronic equipment

A control server includes a device information database storing device characteristic data constituting the air conditioning equipment, a fuel/power rate database storing price and rate data regarding gas, oil, power and the like, a device characteristic and price database, an air conditioning equipment simulator for calculating running costs by using the data stored in the fuel/power rate database, and communication portion for performing communications through a network. The control server, and an air conditioning management controller for managing and controlling the air conditioning equipment provided with the communication portion for performing communications through the network, are connected to the network. An operation plan is made by the control server, the operation plan is transmitted to the air conditioning equipment management controller for controlling the air conditioning equipment through the network, and the air conditioning equipment is controlled and operated according to the operation plan.

Air conditioning equipment operation system and air conditioning equipment designing support system

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Tokyo, Japan

Hiroshige Kikuchi