First round of case study selections for ATMOsphere Asia 2016

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The ATMOsphere Review Board has made its first round of selections for case studies to be presented at ATMOsphere Asia 2016, which will take place on 9 & 10 February in Tokyo, Japan. A second round of case study selections will be announced in the coming days.

Congratulations to Alfa Laval, BITZER, Danfoss, Denso, SANDEN and SWEP, who will present the following case studies during ATMOsphere Asia 2016.

Ammonia heat pump optimization at high temperature water heating, Rolf Christensen, Alfa Laval

This case study presentation will show a possibility to increase efficiency for high temperature ammonia heat pumps where a relatively large temperature rise on the water side exists. By splitting the condenser into two sections, it is possible to lower the condensing temperature and consequently increase the COP of the system. It is also possible to reach outlet temperatures higher than the condensation temperature. Using the concept, one can also achieve outlet temperatures substantially higher than the condensation temperature, and still recover much more heat than only that available by means of desuperheating.

High-efficient integrated CO2-based solutions around the world, Oliver Javerschek, BITZER

CO2 systems represent state-of-the-art technology in commercial refrigeration. However, the highest level of the development is not reached yet. The systems turn more and more into integrated solutions for low- and medium temperature load as well as air conditioning and heating in order to cope efficiently with different ambient conditions and offering at the same time high annual energy efficiencies. This case study will highlight various projects around the world of CO2 applications. All introduced projects are characterised by innovative capacity, integrity, efficiency and sustainability.

Ultra-low charge ammonia glycol chiller cutting down operating costs, Inderpal Saund, Danfoss

The case study will describe in detail a recently installed ultra-low charge glycol chiller operating with ammonia as refrigerant. The capacity of the chiller is 160 kW at -2 SST; the total charge is 4.9 kg of ammonia. This brings the specific refrigerant charge down to an unprecedented 30g/kW refrigeration capacity (compared to 2,000g/kW in some commercial applications). The case study will further detail the decision making process of the end user (Sylvan Mushrooms Australia) and how the ultra-low charge ammonia glycol chiller reduces the operating cost as well as minimizes the environmental footprint.

Energy saving effect of ejector technology, Masahiro Takatsu, DENSO

DENSO launched the first mass production type ejector into the market in 2003. The applications have expanded to refrigerated trucks, CO2 heat pump water heaters, vehicle air conditioners, and CO2 refrigerant vending machines. This presentation will show the energy saving effect and history of ejector development within DENSO.

Results of CO2 refrigeration systems for CVS and other applications, Yukio Yamaguchi, SANDEN

SANDEN’s cascade system with pressure control system certified that CO2 refrigeration system is applicable for Very High Temperature Condition such as over 40 degrees C. SANDEN is a producer of hermetic CO2 compressors; the production of hermetic compressors started in 2011, and the accumulated production volume exceeds 1.5M compressors around the world. From 2014 to 2015, SANDEN delivered over 150 complete CO2 refrigeration systems for CVS in Japan. On top of that, SANDEN CO2 compressors are applied to air conditioning systems in the production facility.

Results of heat exchangers operated in hard water conditions for CO2 heat pumps, Björn Felgenhauer (tbc), SWEP

A system will be presented which protects the heat exchanger from scaling so that the heat exchanger can be safely operated in tap water applications. Components are available- mainly also due to CO2 approach in the industrialized countries but the issue with water quality remains. Stratification is the key to increasing efficiency but at elevated temperatures will increase the risk of scaling. This case study will be showing test results of a heat exchanger operated in hard water conditions according to the taping standard DIN ISO 16147. The heat exchanger was operated with and without a passive back flush valve and even compared with existing tube in tube heat exchanger. Further we show the installation of a CO2 tap water heat pump using a passive back flush principle in real life condition.

About ATMOsphere Asia 2016

Returning for it's 3rd edition, ATMOsphere Asia 2016 is THE industry event bringing together HVAC&R experts from across the globe! Perfectly timed on 9 & 10 February, 2016, to coincide with the Supermarket Trade Show, the conference is expected to attract a record number of both Asian and international end users and other leading industry stakeholders.

The conference will cover the latest natural refrigerant technology innovations, market trends and regulatory issues, looking at both the Japanese scope as well as the international dimension.

To register for the event, please visit

View preliminary programme

For more information about ATMOsphere Asia 2016, please visit

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