Tokyu Department Store - CO₂ Refrigeration System Case Study (in Japanese)

Kazuo Nakano and Tatsuya Tamura, representing the Tokyu Department Store, a Japanese retailer with 11 stores in Japan and one abroad, introduced the company’s actions to reduce the environmental impact of its stores and operations. The company’s efforts include introducing CO₂ refrigeration in a pilot project supported by METI. Shibuya Hikarie, a flagship department store in the centre of Tokyo, opened in April 2012, features 6 units of 13HP water-cooled CO₂ condensing units providing cooling to 40 showcases and 10 prefabricated refrigerated rooms. In comparison to an HFC system, energy efficiency has been improved by 26% and CO₂ emissions reduced by 215 tonnes of CO₂-eq per year.