Facility Operations and Development Team

We perform maintenance and management of electrical and cooling facilities to ensure stable operation of the K computer. We are also working on R&D for maintaining an optimal working environment by combining steam-driven absorption refrigeration and inverter turbo refrigeration equipment, together with the operation of two 5000kW-class cogeneration systems. Other systems our team is developing include hot-spot sensing equipment to keep temperatures uniform in the space occupied by the supercomputer and temperature measurement instrumentation with the capacity of giving feedback to air conditioning and cooling equipment on a real-time basis.

Research Subjects

• Development of the optimization driving technique of a power supply and cooling facilities
• Development of the hotspot analysis technology
• Development of the real-time operation technique

Publications

1. Sekiguchi, Y., et al.:
   "Cooling system of the next-generation super computer -Towards PUE1.3"
   Proceedings of the Annual Meeting 2011 of The Society of Heating, Air-Conditioning and Sanitary Engineers of Japan,469-472(2011)
2. Sekiguchi, Y., et al.:
   "The super computer does not stop in eyewink voltage drop"
   Proceedings of the Annual Meeting 2011 of The Institute of Electrical Installation Engineers of Japan,319-320(2011)
3. Sekiguchi, Y., et al.:
   "Cooling system of the next-generation super computer"
   Proceedings of the Annual Meeting 2010 of The Society of Heating, Air-Conditioning and Sanitary Engineers of Japan,49-52(2010)
4. Morita, N., et al.:
   "Setting example of eyewink voltage drop measures in the next-generation super computer institution"
   Proceedings of the Annual Meeting 2010 of The Institute of Electrical Installation Engineers of Japan,415-416(2010)
5. Sekiguchi, Y., et al.:
   "Power supply facilities of RIKEN next-generation super computer"
   Proceedings of the Annual Meeting 2010 of The Institute of Electrical Installation Engineers of Japan,413-414(2010)