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- Improvement of Production Line
Improvement of Production Line
Since setting the Green Production Line Improvement Guidelines in 2002, Yokogawa has continued make improvements to each production line to reduce the environmental load. Yokogawa is also making efforts to conserve the environment by reducing contaminants in the air, water, and soil as well reducing CO2 emissions generated by the use of electricity while lowering manufacturing cost at the same time.
Reduction of Power Consumption through Compressor Operation Control
Compressor
Yokogawa Manufacturing Komine Factory is working on reducing power consumption by lowering the pressure of the compressor. For the year 2009, Yokogawa Manufacturing worked on lowering the pressure of the compressors those are operated 24 hours a day.
After evaluating the pressure levels in equipment, we installed amplifiers on ultrasonic welders that had recorded large pressure fluctuations. This has enabled the compressors throughout the factory to run at a lower pressure of 0.59 MPa (originally 0.64MPa), reducing the annual power consumption 40%, from 9.9MWh to 6 MWh.
Effects of Power Reduction by Day-to-Day Monitoring
Yuuji Kuwata
Energy Conservation Team Leader
Yokogawa Manufacturing Kofu Factory
Yokogawa Manufacturing Kofu Factory has been actively realizing energy savings through day-to-day monitoring. This is led by an energy conservation team consisting of Kofu Factory's qualified person for energy management, the department in charge of the facility, and environmental facilitators from each department. Through this team, a company-wide effort is being made to visualize energy data and to eliminate waste in production lines, using YOKOGAWA's own products InfoEnergy and Enerize. Because energy consumption can be grasped by the facility operator in real time for each line or product, suggestions for improvements from the production floors are being made proactively.
Since the year 2000, the Kofu Factory has been proactively rolling out energy saving initiatives such as the use of inverters in lighting and large pumps, or the deployment of energy efficient equipment at various places within the factory. In order to continually foster these practices, they have required each department to set target power consumption values, and to monitor its energy consumption daily, posting them on the "action board" in their work area.
By clarifying each department's environmental goals such as target power consumption and the department in charge of each goal, there is a heightened sense of awareness among the members of the energy conservation team and members of each department. This in turn, makes this a fully participated energy conservation effort.
In addition to such low-profile activities, in 2009, the factory made efforts to reduce power consumption by controlling the air conditioning of the clean room. There is a need to maintain the air at a certain humidity and cleanliness in the clean room, so by making fine adjustments and shutting down some of the indoor and outdoor air conditioning machines afterhours for the night, an annual energy saving of approximately 360 Mwh is projected.
