Energy-Saving Activities by Optimizing Steam Supply in the Site

Japan Semiconductor Corporation Oita Operations

Japan Semiconductor Corporation Oita Operations, which manufactures automotive analog semiconductors, etc., is a type 1 designated energy management factory under the Act on Rationalization of Energy Use and Shift to Non-fossil Energy (hereinafter referred to as the Energy Conservation Act).Since over 90% of the energy used at the Operations is electricity, our energy-saving initiatives have primarily focused on reducing electricity consumption. Recently, however, we are also working to reduce city gas consumption, which is also a necessary energy-related initiative under the Energy Conservation Act.
Specifically, we reviewed the steam supply system between buildings in the site to minimize heat radiation loss, maximized operational efficiency using water tube boilers along with newly installed compact once-through boilers after more precisely predicting the required steam within the Operations, and adjusted the steam supply pressure.
As a result of these initiatives, we successfully reduced our city gas consumption by 9.1% compared to previous levels. These initiatives received Energy Conservation Center Chairman's Award in the Energy Saving Category at the awards ceremony for the 2022 Energy Conservation Grand Prize for excellent energy conservation equipment.

Awards ceremony for the 2022 Energy Conservation Grand Prize