Chillventa - A Showcase for CO2 (Part 2)

By team, Oct 17, 2008, 14:35 4 minute reading

In this second part of live reporting from the international fair Chillventa, you can find selected key innovations  for industrial and commercial cooling and heating with CO2. Many other applications working with the natural refrigerant are on display. 

The last day of Chillventa, although more quiet than the previous two days, still revealed high interest from visitors for CO2 products on display, as component and system manufacturers confirmed to at the fairground. Besides already well established suppliers of CO2 compressors and installations, new manufacturers entered the field of R744 cooling, refrigeration, and heating. Prototypes and world premieres were visible at several booths.

Since a detailed reporting on all CO2 products presented at the fair is not possible, given the impressive amount of them, can only present selected ones below. However, we encourage you to send us more material about products not mentioned below.

The R744 Products

Danfoss: One part of its huge booth is dedicated to CO2 refrigeration in industrial and commercial applications. Movies explaining the application of Danfoss components and the operation of R744 systems match a display of valves, case controllers, cartridge pressure controls, pressure transmitters, expansion valves, and CO2 gas cooler pressure controls, to name just a few. 

Carel: The Italian supplier of retail solutions features its “Retail Sistema”, including a wide range of expansion valves exclusively developed for the use in subcritical and transcritical CO2 systems. Carel has added a new expansion valve for systems up to 1300 kW, displayed for the first time at Chillventa. Next year, it will complete its range with two new models, then covering the whole range from 40 to 2000 kW. While the market interest for subcritical solutions has now stabilized, Carel is seeking new opportunities in Asia. Two weeks ago it delivered the first subcritical system to South Korea. The company sees the future in a mixture of subcritical and transcritical systems on a global scale.

GEA: The international group has a huge variety of products suitable for CO2 on display, ranging from valves to large cooler systems. Its cooler for fruit and vegetables is used in ultra low oxygen rooms for temperatures around 0°C at an evaporation temperature of -5°C. It is highly successful in the Netherlands where in 2003/04 subsidies for using CO2 were provided. Although funds are no longer available, contractors have gained enough knowledge to produce R744 solutions at a cost-competitive price compared to HFC-based units. Requests by retailers show that CO2 is often preferred as the “greener” alternative.

Grasso: Part of the GEA Refrigeration group, Grasso has developed a compressor range for subcritical as well as transcritical industrial cooling and heating. The models can be used in coffee freeze drying, cooling of fishing vessels, and in heavy heat pumps, among others. Their reciprocating compressor for CO2 freezing and NH3 heat pump applications is operating at up to 50 bar. Subcritical applications are now considered a standard solution whilst transcritical systems are only in the first phase of commercialization.

Maja: The German manufacturer is displaying a CO2 ice flakes machine operating live on the exhibition floor. The world premiere first presented to the public at this event, produced 30% more ice than R404a systems. Depending on the model, Maja’s ice machine supplies 500 to 3,800 kg of ice in 24 hours. The system displayed at Chillventa uses a Bitzer compressor.

Rivacold: The Italian company features two products for R744 at Chillventa. Its new CO2 FT packaged and split refrigeration system for cold rooms, using Embraco compressors, is still in the prototype phase. Once Embraco has expanded its series of R744 compressors, Rivacold will work on further variations of the FT model now suitable for cold rooms of up to 11 m3. Its new R744/R404a cascade rack, using Bitzer compressors and Danfoss components, is also available as a prototype. As other manufacturers before, Rivacold confirms that Scandinavian countries are now major drivers for R744 solutions.

Henry Technologies: The UK component supplier showcases oil separators, regulators, reservoirs, filter driers, liquid level switches, and relief valves for CO2 subcritical systems. The company noticed a significant increase in inquiries for CO2 subcritical solutions this year. Henry Technologies also built three prototypes of an oil separator for transcritical solutions: one for UK retail group Tesco, another one for the Danish Technological Institute, and one for show purposes.

About Chillventa

The international trade fair for refrigeration, air conditioning, ventilation and heat pumps is held for the first time. Running from 15-17 October, the event accommodates more than 800 exhibitors from 43 countries. The next event will be held mid-October 2010.



By team (@r744)

Oct 17, 2008, 14:35

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