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Business Sites:Energy Conservation / Prevention of Global Warming
–Introduction of High-efficiency Equipment–

Introduction of highly efficient humidifying systems

  • JAPANJapan/Ricoh Microelectronics Co., Ltd.
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Ricoh Microelectronics Co., Ltd. (RME), a manufacturer of electronic circuit modules, has been working to improve the energy efficiency of its energyintensive humidifying systems in the middle and long term. In fiscal 2009, four steam humidifiers on the first floor of its factory were replaced with highly efficient evaporative humidifiers. Air conditioning is necessary on the first floor throughout the year due to the heat from the manufacturing machines. The introduction of these evaporative humidifying systems has eliminated the need to use energy to generate steam, and has taken much of the load off the air conditioning due to lower room temperatures achieved through the power of vaporization. In addition, one of the four air conditioners has been equipped with an inverter that minimizes the air volume to control the factory temperature when it is not operating. These measures are expected to reduce the consumption of Bunker A fuel oil by 35.4 kℓ, or approx. 30% of the annual amount used and annual electricity consumption by 118,787 kWh. These improvement activities became eligible for a fiscal 2009 subsidy from NEDO* for business operators working to improve the efficiency of energy use.

  • *NEDO: New Energy and Industrial Technology Development Organization

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Installing an inverter compressor and improving the control method reduces energy consumption

  • JAPANJapan/Ricoh RS Division (Fukui Plant)
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Ricoh Fukui Plant has had energy monitoring systems installed since 2000 to measure the energy used on the production line and by the processes on a real time basis. The data obtained is used to identify and prioritize areas for improvement, enabling the plant to carry out energy-saving activities effectively and efficiently.
When producing toners, compressed air is used to crush the raw materials against the panel to produce the toner particles. The air compressors used for this purpose account for approximately 45% of the total CO2 emissions in the toner production process.
To reduce CO2 emissions, the plant replaced one of the air compressors
used in toner production with an inverter controlled model. Mainstream compressors usually operate with an on-off control system, which inevitablyinvolves unnecessary energy consumption when adjusting the pressure to the change in the airflow requirements. In January 2009, the plant installed an inverter controlled compressor based on the result of an elaborative calculation. The introduction of this one inverter compressor unit improved the compressor control system, optimized the number
of compressors in action, and thus eliminated 98% of the energy lost under the existing system.
As a result, the Fukui Plant reduced its annual power consumption by 888.7 MWh, CO2 emissions by 335.9 tons, and related costs by approximately 12 million yen.

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