The ATMOsphere Review Panel is pleased to announce the second round of case study selections for ATMOsphere Australia 2017 on 2 May in Sydney.

SCM Frigo, CAREL Australia, Emerson, CRS, KAV Consulting and Kawasaki Heavy Industries will discuss their innovative natural refrigerant-based technologies at the conference. 

SCM Frigo: Improving the energy efficiency of CO₂ refrigeration system by Mirko Bernabei

This case study refers to a test SCM Frigo has done on a booster unit equipped with all the technology available today, measuring the different performances. The test has been carried out in a certified LAB in Italy (IMQ lab in Amaro, Udine) in compliance to EN 14511:2013. 

The presentation will discuss how both parallel compression and mechanical subcooling solutions appear to be convenient solutions for reducing commercial refrigeration CO₂ system limits in warmer climates; where, as a matter of fact, both efficiency and refrigeration capacity of the transcritical single compression cycle undergo a rapid deterioration. 

CAREL Australia: Transcritical CO₂ systems for supermarket applications in Australia by Iain Skelton

8 transcritical CO₂ installations currently installed in NSW, VIC, QLD & WA. All of these installations are operating successfully using the CAREL transcritical controls solution. The presentation will give an overview of the necessary necessary components, controls and systems supplied into these projects. Furthermore, Skelton will discuss investments in technology and innovation while creating solutions to practically eliminate the 'climate barrier' for transcritical CO₂ systems in warmer climates. 

Emerson: The Helix Innovation Center - providing infrastructure to enable natural refrigerants adoption by Abel Gnanakumar

Helix Innovation Center provides a real life scenario to evaluate the different strategies to accomplish towards sustainability, for developing training content and hands on training. The center incorporates facilities to replicate a residential home, light commercial building, food service operation and supermarket. The investment provides an excellent opportunity for multiple stakeholders to come together, brainstorm, develop data driven justifications in controlled conditions while simulating real life scenarios.

This presentation of the transcritical CO₂ system strategies evaluation planned in Helix Innovation Center will be of interest to end users, consultants and system integrators being a warm to hot summer in the region. 

CRS (South Africa): Blast freezing of avocados with CO₂ by Wynand Groenewald

This case study explores the project designed, manufactured and installed by CRS, located in Johannesburg, South Africa. The facility employs a blast freezer application with a full CO₂ system. Its features include conveyor belt solution, with flooded evaporation system, making use of liquid reticulation at a evaporating temperature of -44°C. 

KAV Consulting: Two CO₂ projects with evaporative condensers by Klaas Visser

The company has recently completed the design of two Multi Function Two Stage Transcritical CO₂ Refrigeration Systems with Parallel Compression (MF2STCCO₂RSPC) employing evaporative condensers. 

The first project is currently under construction at a Cook Freeze facility North West of Sydney with a design capacity is 18,000 meals/day equating to about 12 tonnes/day. The system performs eight refrigeration functions and five heating functions. 

The second project is the design of a MF2STCCO₂RSPC for a 42,000 m3 −30°C cold store in Malaysia.  This system performs five refrigeration functions and four heating functions. This system demonstrates that efficient CO₂ refrigeration application is possible the world over if evaporative condensers/gas coolers are used.

Kawasaki Heavy Industries: Kawasaki turbo chiller using R718 (water) as refrigerant by Hayato Sakamoto

Kawasaki has developed turbo chiller using natural refrigerant of R718 (water) as refrigerant for air conditioning applications. Its refrigeration capacity is 100USRt (352kW) and COP is 5.1 at 30°C of cooling water temperature. Besides adoption of R718 (water) as refrigerant, Kawasaki turbo chiller has the comparable performance to existing chillers using HFCs, and is as compact as existing chillers by optimum arrangement.

Amount of HFC reduction by adoption of Kawasaki turbo chiller is estimated (assuming ambient temperature and cooling water temperature in Australia) to be 660 CO₂-ton and inclusive emission of HFC and CO₂ from power consumption would be reduced by 15% against existing HFC chillers.