Absorption chillers

At the Keihanna Technology Innovation Center, OMRON's R&D base, power supply systems and air conditioners are in operation around the clock for the cleanroom and environmental testing facilities. To accommodate this power demand, the center uses a gas cogeneration system together with a commercial power source.

As an energy-saving measure, the center changed the cogeneration system control method to suppress power variations accompanying the switchover to commercial power, resulting in a drop in the peak value. In addition, optimized settings for heat source water flow rate-based operation of absorption chillers enabled operation for longer hours, which contributed to enhanced efficiency for waste heat usage. Data for electricity usage and operation time for each equipment piece has been an accumulated 95%. Based on this data, the energy supply was optimized by factoring in load fluctuations associated with the deployment of equipment and personnel. As a result of these efforts, the Keihanna Technology Innovation Center reduced energy usage by 11% and CO2 emissions by 1,100 tons compared to fiscal 2005.