The ATMOsphere Review Panel is pleased to announce the first round of case study selections for ATMOsphere America 2018 taking place on June 12-14 in Long Beach, California.

CAREL Industries, Carnot Refrigeration, Emerson Commercial and Residential Solutions, Hillphoenix, and YourCleanEnergy will discuss their innovative natural refrigerant-based technologies at the conference. 

The presentations are: 

CAREL Industries | Modulating Ejectors: next steps for CO₂ transcritical systems in the USA by Diego Malimpensa 

CAREL Electronic modulating Ejectors are the cutting-edge solution that increases the energy efficiency of transcritical CO₂ systems in warmer climates, sustainably extending the possibility to use CO₂ in commercial refrigeration. The main feature of the solution is the continuous modulation ensured by the CAREL ejector design combined with dedicated control algorithms. Together they allow the system to continuously adapt to the typical variations in operating conditions of refrigeration system.

There are two main critical points for the success of this technology: usability: to be widely adopted, a new technology needs to be simple, and needs to be easily understood from all parties involved in the life cycle of a refrigeration system; and sustainability:available for all formats ande easy to be applied with a reasonable return on investment

Carnot Refrigeration | A CO₂ air conditioning chiller at the German embassy by Marc-André Lesmerises

Emerson Commercial and Residential Solutions | Integral display case technology will change the European retail landscape by Andre Patenaude

This case study will share the results of an independent institute comparing two different refrigeration system architectures using natural refrigerants from a leading European Small format retailer. Savings of the total store portfolio of this retailer from the entire life-cycle assessment will be detailed.

Hillphoenix | Application of CO₂ transcritical system at specialty bakery expansion by John Gallaher

Angelic Bakehouse is a sprouted grain bread producer that offers a variety of products that achieve Pure Bread Perfection. For an expansion of their faciity in Cudahy WI they turned to Zone Mechanical to help provide the best refrigeration system for their needs. The expansion includes five blast freezer cells, a packing area, a storage freezer and a shipping dock. While the initial consideration for refrigeration systems was to use ammonia, the location was in close proximity to multiuse development including retail and residential areas.  Zone Mechnical of Alsip, IL had experience applying CO₂ transcritical in other industrial applications and proposed the technology for use in the expansion. Angelic Bakehouse made the decision to utilize a CO₂ transcritical system because of  the safe and energy efficient operation experienced elsewhere in the Upper Midwestern United States. The presentation covers energy efficiency advantages and life cycle cost advantages compared to other technologies.  

YourCleanEnergy | Starter district heat for city of Seward, Alaska by Andy Baker

An innovative district heating system for the City of Seward, Alaska, with transcritical CO₂ heat pumps, has been recommended for funding by Alaska Energy Authority and Governor of Alaska. The concept design was completed by YourCleanEnergy LLC of Anchorage and utilizes ocean source heat loops to supply CO₂ heat pumps in the City Library, City Hall, City Annex, and City Fire Station. The design is based on Mayekawa 20 ton Unimo units connected to large buffer tanks that offset conventional oil and electric boilers in these existing buildings.

This project is integration of 300 ft deep vertical source loops in gravel adjacent to the ocean; transcritical CO₂ heat pumps; and waste heat recovery that reduces ocean source pumping required. The project will become the northern most ocean source district heat system in the USA, with the additional benefit of featuring the natural refrigerant CO₂ to offset fossil fuel heating