Mitsubishi Heavy Industries Limited

Yo Akiyama

Akihiko Yano

Junichi Kaga

Makoto Kishi

Atsushi Matsuo

Yoshihiro Deguchi

Seiji Goto

Taketoshi Yamaura

A system for planning operation of a power plant capable of a first mode driving a power generator using a turbine and a second mode not driving the power generator using the turbine over a predetermined period. A determination unit determines whether a predicted power-selling price is higher than a power generation cost; and a planning unit calculates a loss index of the first and second modes in a case where the predicted selling price is equal to the generation cost or less within the predetermined period and formulates a plan to operate the power plant in a mode having a smaller loss index. The loss index of the first mode includes a power-selling loss that is a difference between the predicted selling price and the generation cost, and the loss index of the second mode includes a loss that is caused by not driving the power generator.

Operation plan planning system for planning an operation plan of a power plant and operation plan planning method for planning an operation plan of a power plant

An oil-degradation detecting apparatus that can more accurately judge oil degradation and a mechanical system having a rotating part or a sliding part and including the oil-degradation detecting apparatus are provided. Two plates () are disposed in an oil flow path () so as to be parallel to each other, an ammeter () measures a current that flows when an AC voltage is applied between the two plates (), a voltmeter measures the voltage between the plates (), and a signal processor (processor) () determines the electrical conductivity and the dielectric constant of the oil () based on the measurement results from the ammeter () and the voltmeter () and judges degradation of the oil () based on the electrical conductivity and the dielectric constant.

Oil-degradation detecting apparatus

A method of monitoring deterioration of lubricating oil and a device therefore capable of judging deterioration of the oil with high accuracy suppressing measurement error due to mixing of foreign matter in the oil. Correlation between relative permittivity and TBN (total base number) of the lubricating oil is obtained beforehand (step S), electric current and voltage are measured (step S) when high-frequency voltage is applied between a pair of electrodes located in an oil path in a gas engine, permittivity of the oil is detected (step S) based on the measurement of current and voltage, TBN of the oil is obtained (step S) from the correlation between relative permittivity and TBN, and deterioration of the oil is judged by the obtained value of TBN.

Method of monitoring deterioration of lubricating oil and device therefore

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Tokyo, Japan

Yo Akiyama