レーザトルクセンサを用いた発電プラントの性能診断技術

概要

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More than 70% of electricity in the world is supplied by thermal power plants, which use fuels such as oil, coal and liquefied natural gas. In recent years, combined cycle power plants fill the leading role of thermal power plants. It is important to evaluate the efficiency of turbines in combined cycle power plants, so that it leads fuel conservation and reduction of carbon dioxide emissions. Heat input-output analysis is often used to evaluate turbine efficiency. But the accuracy of analysis is approximately 10%, because it is difficult to measure high temperature fluid parameters such as flow rate and temperature. Therefore, we are developing a high accurate non-contact torque measurement system, which is comprised of He-Ne laser sensors, thin metal reflectors and the correlation method for calculating turbine torque by sensor output signals. We confirmed that torque measurement accuracy is approximately 1% in field tests for steam turbine power plants. Further, we carried out field tests in a combined cycle power plant. As a result, this torque measurement system is expected to be useful for a high accurate torque measurement in power plants.
一般社団法人日本機械学会の論文
2009-02-25