Mitsubishi Hitachi Power Systems, Ltd.

Yoshiyuki Hamaji

Mayumi Saito

Toru Tanaka

Akihiro Hamasaki

Atsushi Sugimoto

Masashi Inoue

Naotaka Mikami

Masayuki Takahama

Masanori Fujioka

Provided is a plant state monitoring method which monitors an operation state of a plant by using the Mahalanobis distance based on the plant state amount. The method creates a first unit space as a set of data used to be a reference when judging whether the plant operation state during a start operation period is normal according to the state amount in the plant start operation period. The method also creates a second unit space as a set of data used to be a reference when judging whether the plant operation state during a load operation period is normal according to the state amount in the plant load operation period.

Plant state monitoring method, plant state monitoring computer program, and plant state monitoring apparatus

A water quality management device is provided with a water quality index value acquisition unit which acquires water quality index values including a makeup water quality index value indicating water quality of makeup water and a circulating water quality index value indicating water quality of circulating water, and a determining unit which determines an amount of concentration control associated with a concentration rate of a circulating water system based on the water quality index values acquired by the water quality index value acquisition unit.

Water quality management device, water treatment system, water quality management method, and program for optimizing water treatment system

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Hyogo, Japan

Yoshiyuki Hamaji