CAREL@Chillventa: sustainability starts with natural and low-GWP refrigerants

Control solutions for systems that use natural and low-GWP refrigerants are the focus of CAREL’s offering at the upcoming Chillventa, where sustainability will be one of the most interesting and widely-discussed topics. It is now clear that tackling climate change is essential for all economic sectors, as well as an opportunity to build a new economic model that everyone can contribute to.

With extensive experience in the design and production of solutions aimed at saving energy and involving the use of alternative refrigerants, CAREL is ready to face the current challenges for industry as a whole, and the process industry sector specifically, proposing μChiller Process for the small and medium-sized process chiller market. The μChiller family is the CAREL solution for the complete management of commercial air/water and water/water chillers and heat pumps with on-off and/or DC compressors; μChiller Process has been specifically designed and developed to ensure compatibility with the current F-gas directive and work with natural and low-GWP refrigerants, such as CO2, R290, R32, R452B, R454B, R513A and many others. In addition to these features, advanced local and remote connectivity functions are available for simple, fast, intuitive, and improved system management, including through dedicated apps for smartphones and tablets. Together with electronic expansion valves, drivers, compressors, and sensors, μChiller Process is part of the range of CAREL solutions classified as A2L ready and A3 ready and therefore meet the requirements of the regulations regarding the use of flammable gases. These products can then be integrated by unit manufacturers to achieve the required objectives in terms of efficiency, safety, and electrical compliance, as well as fulfil the latest technical requirements for industrial HVAC applications, requirements that will also shape the future of the market.

The commercial refrigeration market, above all in Europe, is naturally also part of the drive towards energy transition. This on one hand involves reducing system GWP to limit direct emissions, and on the other striving to achieve higher efficiency and consequently reduce indirect emissions. The new Heosbox CO2 condensing unit for water loop systems is a solution that meets both needs: equipped with Heos high-efficiency technology and designed to operate with CO2 refrigerant in subcritical conditions, it requires a lower refrigerant charge and thus guarantees a drastic reduction in the risk of leakages. Furthermore, precise and optimised control of the individual units and synchronised operation of the BLDC compressor and electronic valve maximise overall efficiency. Finally, in a subcritical system, the use of CO2 (as an alternative to flammable refrigerants such as propane) overcomes the current charge limits and limits the related technological costs due to lower operating pressures.

Analysis of the most sustainable solution, at an affordable price for the various different applications, extensive experience in the design and production of control systems, and continuous testing and experimentation have led to the choice of the CAREL range of scroll and rotary compressors presented at Chillventa. CAREL has developed particularly efficient products and solutions that combine or alternate the various features based on the specific use and the requirements of the application. Alongside the more traditional ranges that work with synthetic refrigerants (R-410A, R-32, R-448A, R-449A, etc.) there are products designed for natural refrigerants with low or zero GWP, such as carbon dioxide (R-744, CO2) and propane (R-290). These include both fixed speed and variable speed compressors using DC inverter technology. The latter, when combined with electronic expansion valves, make it possible for the CAREL high efficiency solutions to achieve continuous modulation of performance.