We are happy to announce the first five Technology Case Study Presentations for ATMOsphere Europe 2012. Below you will find a short summary of the case studies selected:
Field trial results of efficient container refrigeration applications using CO2 by J. Michael Griffin, Carrier Transicold:
As the shipping industry becomes more focused on making further improvements to reduce the global warming impact of refrigerated container shipping, much attention has been given to CO2 emissions, both direct and indirect. In anticipation of this growing concern, last November Carrier introduced the world’s first natural refrigerant container unit, the NaturaLINE™, which uses carbon dioxide (CO2) refrigerant. The units have successfully operated over a full range of ambient temperature settings and conditions, maintaining frozen and perishable set points -35º C (-31° F) to 30º C (86° F), on routes crossing the Atlantic and Pacific oceans, on trips ranging from 4- to 28-days. To demonstrate the success of the NaturaLINE sea trials, Carrier will provide a case study overview of an actual shipment. Overall performance characteristics, such as energy and CO2 emissions savings will also be discussed. As of July, a progressively growing number of NaturaLINE units had been put into service among four customers. Carrier will review field trial results as demonstrated by the participating major shipping lines.
Transcritical CO2 cooling system for Norwegian ice cream manufacturer by Torben Hansen, Advansor:
The case study will present a project with Norway’s leading ice cream manufacturer, Diplom-Is AS, who wanted to install an environmental and cost efficient refrigeration system in a newly built cold storage warehouse in Trondheim, Norway. Advansor delivered a CO2 transcritical booster system. The key concept includes a single rack design fitted with compressors, oil management system, receivers, safety equipment, electric cabinet including a controller system that ensures reliable operation. Heat recovery with capacity of 150kW and hot gas defrost options were specially designed and added to the booster system on the medium temperature and low temperature discharge side. Expected yearly energy savings as well as first results and efficiency figures will be presented.
Large scale NH3/CO2 system for warmer climates by Alexander Cohr Pachai, Johnson Controls:
Considering the Montreal Protocol and the coming phase-out of CFCs and HCFCs in article 5 countries, Jordan Poultry has chosen to invest in a CAFP cascade unit using ammonia for the high temperature stage and CO2 for cooling and freezing applications. JCI will present the project that was installed and commissioned in August 2012, a system that is perfectly suitable for warmer climates like the Mediterranean regions. Phase 1 of the installation comprises two batch freezing cells and a chilling conveyor belt which is connected to the CO2 system. The refrigeration plant is designed with a minimum ammonia charge to cool a two-stage CO2 system. The CO2 high temperature stage for cooling will be running at -10℃ and the batch freezer will run at -40℃. Results from phase 1 of the project will be presented as well as possible future upgrades including a CO2 recovery system that will be able to produce about 500 kg CO2 / hour.
Transport refrigeration system using CO2 by Bart Ezendam, Thermo King:
The case study will summarise the developments by Thermo King of cryogenic solutions over the last 15 years which reduce the carbon footprint of refrigerated vehicle fleets. Being the only open cycle transport refrigeration system using CO2 that is currently commercially available, the concept is based on the use of liquid CO2 (R-744) to provide refrigeration effect. CO2 is available in massive quantities as a by-product of various industrial processes such as fertilizer and chemical production. The comparative impact of an open cycle CO2 based cryogenic solution versus conventional diesel driven refrigeration units as well as nitrogen based solutions are also discussed. An analysis of the actual refrigerant consumption, and thus the carbon footprint emission between the cryogenic refrigerated vehicle fleet and a diesel driven refrigerated vehicle fleet, based on a typical life of the units will be also presented.
Efficiency improvement in commercial refrigeration for warmer climates with CO2 by Sergio Girotto, enEX:
A new system design, based on a liquid recirculation method using an ejector for liquid pumping with a saving potential of 15% during the whole year as well as experimental data will be presented by Sergio Girotto. It is based on the assumption that the current basic CO2 technology uses a design derived from the one in use with HFCs. Due to that the potential of CO2 as a refrigerant is not fully exploited. Furthermore the present solutions, widely used in Nordic countries, are not suitable for warmer southern European climates, as well as in many other areas of the world. A thorough re-design and experimental work has been undertaken to solve this and new products incorporating the latest developments are now on the market. The ejector design can be easily combined with another technique suitable for increasing efficiency in warm climates. Since 2008 several types of the so-called parallel compression techniques were installed and their results were fully analysed. At the moment 12 installations are in operation in several countries. Lessons learned will be presented, as well as an energy and economic analysis. The overall energy efficiency increase compared to simple CO2 systems now in use, combining the 2 above methods, can be as high as 25%. The impact of the new solution in terms of increased reliability and safety for the end user will be discussed.
Next week we will announce part two of the selected technology case studies for ATMOsphere Europe 2012.
Preliminary programme
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