ATMOsphere Asia 2015 announces Case Study Selections

By Pilar Aleu, Jan 26, 2015, 18:00 5 minute reading

The ATMOsphere Review Panel has announced the case studies selected for ATMOsphere Asia 2015, which will take place from 3-5 February in Tokyo, Japan. Leading companies will present their latest natural refrigerant technologies and projects for a number of different applications, including commercial refrigeration, light commercial refrigeration and heat pumps.

Panasonic, Mayekawa, Sanden, Danfoss, BITZER, Carel, Yamato, Danfoss, Emerson REI-TECH and Mitsubishi Heavy Industries will be presenting their innovative CO2-based technologies and/or projects at the 2nd annual ATMOsphere Asia conference in Tokyo, Japan.

"Transfer pressure control type" CO2 refrigeration system by Hidekazu Tachibana, Panasonic

The presentation will provide an introduction to Panasonic’s environmental strategy and related solutions for food logistics. In particular, it will focus on Panasonic’s CO2 refrigeration systems discussing the current record of installations, as well as future developments. The case study will look at Panasonic’s “Transfer pressure control type” CO2 refrigeration systems, in which the automatic control of transfer pressure from the condensing unit was developed.

Introduction of “Pascal Air” – an air refrigeration system by Nobuya Ishitsuka, MAYEKAWA MFG

Mayekawa has developed a refrigeration system using air as the working fluid. Known as the “Pascal Air”, this refrigeration system produces the extremely low temperatures (-50°C ~ -100°C) required in cold warehouses. The presentation will highlight how the “Pascal Air” has been applied in cold warehouses, food freezing and the pharmaceutical industry.

CO2 cascade heat pump for CVS by Yukio Yamaguchi, SANDEN Corporation

SANDEN will present its CO2 cascade refrigeration system which equips 3 CO2 loops in one system. While HFC-CO2 cascade refrigeration systems are well known globally, SANDEN’s cascade system is unique in that it equips the CO2 loop not only on the lower side, but also on the higher side. SANDEN developed a pressure control system to improve the COP of the refrigeration system, improving COP by about 20%. It also developed an all aluminum gas cooler for the CO2 loop, one of the best solutions for reducing the cost of the system. During the case study presentation, SANDEN will discuss the application of its CO2 cascade heat pump in CVS stores.

Empirical evaluation of the annual efficiency for a trans-critical R744 booster system with parallel compression in Asian climate conditions and sample applications by Oliver Javerschek, BITZER

Looking at supermarket applications, booster systems represent the most common system type for transcritical CO2 applications. The application of parallel compression is an increasingly applied as one of the methods for increasing the annual COP of these types of systems in warmer climates. Bitzer will present the potential for an improved energy efficiency with parallel compression with a state-of-the-art transcritical CO2 booster system with flash gas bypass, which was installed at BITZER’s Rottenburg site for practical training seminars in autumn 2010. The case study will also provide further information about systems with parallel compression applied in the field.

Integrated CO2 systems for warm climates by Katsunori Shibata, Carel

Within the commercial refrigeration industry, SWC and CAREL Japan are drawing from lessons learned in Europe and implementing the technology in Japan. Given the Japanese market’s large focus on convenience store formats, the most applicable solution is a small footprint CO2 transcritical compressor rack. The CO2 transcritical compressor rack is a system able to run with a maximum pressure of 120bar on the high side. Through the use of a high-pressure valve (HPV) and a receiver pressure valve (RPV), the high stage pressure can be controlled, maximising the COP of the entire system and regulating the intermediate pressure lower than 60barg. This allows for the installation of standard components from the liquid line to the cabinets. Two compressor racks have been installed in different labs to test the technology and provide real training.

F-gas free Ultra Eco-Ice System with CO2 refrigerator by Sadao Nishimura, Yamato Co.

Yamato will present its F-gas free Ultra Eco-Ice System, designed for display cases, which uses a CO2 refrigeration system and brine-ice thermal storage system. It allows end users to retrofit existing display cases to use brine, rather than replacing the entire case. There is no high pressure CO2 within the supermarket. The system operates the thermal storage with multiple CO2 systems to ensure operation with cold storage and other CO2 units if one should fail. This ensures high safety and reliability within the system. Yamato will focus on a demonstration project that retrofitted the high and medium temperature display cases of an HFC system to a CO2 brine system.

Retailers Ensure Sustainable Technology Uptake - KIWI case Norway and transcritical technology fitting Asia by Anders Juul, Danfoss

Focusing on a CO2 refrigeration system set up by Danfoss and Carrier in a Kiwi supermarket in Auli, Norway, the presentation will discuss how the 1,300 square meter store expects to save 50% on electricity, a reduction similar to 100 private homes. The project in Norway serves as an example for environments with an annual average temperature less than 30°C such as Japan, Korea, Mongolia and northern China.

Controls designed to help improve CO2 system pressure stability by Abel Gnanakumar, Emerson

Emerson’s presentation will highlight the company’s latest developments in the field of CO2 refrigeration including Emerson controls designed to improve CO2 system pressure stability. The optimisation of CO2 system pressure is achieved by improving flash tank pressure stability, evaporator pressure / temperature stability, system suction pressure stability and higher suction pressures. Advanced high-pressure controllers help maintain sub cooling in condensers in subcritical mode, create pressure drop into the flash tank and optimise COP during transcritical operations.

CO2 Heat pump water heater for commercial use by Hironari Fujiki, Mitsubishi Heavy Industries

Mitsubishi Heavy Industries has developed a two-stage compressor for commercial CO2 heat pump water heaters. Employing the world’s first combination of rotary and scroll mechanisms and intermediate gas injection, it realises high reliability and high efficiency under a wide range of conditions. The Q-ton, a commercial CO2 heat pump water heater equipped with this compressor, has significantly improved the heating capacity and COP, making it possible to introduce heat pump water heaters in colder regions, which has proved difficult in the past. Energy costs were reduced by approximately 50%. Mitsubishi Heavy Industries’ presentation will focus on the product and its energy saving results, providing site examples at a hotel, a factory and a care home for the elderly.

About ATMOsphere Asia 2015

ATMOsphere Asia serves as the meeting place for HVAC&R industry stakeholders from both Asia and around the world to discuss the latest natural refrigerant market trends, regulatory issues and technology innovations. The conference programme covers a range of applications including commercial, light commercial, & industrial refrigeration, heat pumps and air conditioning.

To register for the event, please visit

View preliminary programme

For general information, please visit


By Pilar Aleu

Jan 26, 2015, 18:00

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