A proposal on energy utility management of the ILC

Peak electric power capacity in the ILC first phase of the plan will be 164 MW and annual power consumption will be up to one billion kWh. In our experience of large-scale accelerator facilities, the maximum peak electricity load was 96 MW in TRISTAN (59% of ILC) and the maximum annual power consumption was 500 million kWh in B-factory (50% of ILC). Reduction of research facility CO₂ emissions is a serious concern thus the ILC design is based upon superconducting RF technology which is optimized to obtain high luminosity using as little power as possible. In addition great effort has been made to improve the power efficiency of all of the accelerator components and to recover the power from the spent beam after collision. Due to the large volume of liquid helium stored in the ILC (about 660 k liters), the electric power system should be highly reliable and an enough redundancy. Therefore, the power to be used in the ILC, will likely be supplied from the commercial power grid and by using the gas cogeneration system (CGS). In this paper, we would like to propose that the air-conditioning of the research facility be powered by woody biomass and solar thermal energy sources and that in addition waste heat produced by the facility will be utilized by local industries. These are some of the methods we would like to propose in order to realize the goal of being a 'Green ILC'. (author)