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Ground freezing technique using CO2 in constru...


About this presentation

related to ATMOsphere Asia 2016
published on 10 February 2016
14 pages

After explaining the concept of ground freezing techniques using natural refrigerants for construction works, the presentation comapred a CO2/NH3 freezing system to a conventional R22 system, which achieves a vastly greater COP of 2.55 compared to 1.63. Chemical Grouting intends to help green the construction sector in Japan, with a metropolitan expressway and bullet train among its planned works in the near future.

About the speaker(s)

Hiroshi Soma


Dr. Soma serves as the Manager of the Engineering Development Departement at Chemical Grouting, Co.,Ltd. He studied new methods and machines for soil improvement and thermal flow. He received his Dr. Eng. focusing on the theme of the geothermal heat pump utilizing CO2 in 2012. He joined Chemical Grouting in 1996.