At a leading German symposium, numerous participants from academic and business sources spoke in favour of CO2 (R744) technology for stationary and mobile air conditioning, heating and refrigeration.
The annual meeting of the German Refrigeration and Air Conditioning Association (DKV, Deutsche Kälte-Klima-Tagung), held from 22 to 24 November in Dresden, gathered component and systems suppliers, as well as chemical and engineering companies. Numerous German universities and research institutes presented their latest research results in the areas of refrigeration and air conditioning.
Speakers from seven European countries discussed sustainable, cost- and energy-effective ways for heating and cooling applications. Contributions covered a wide range of fields, including industrial and supermarket refrigeration, components technology, heat pumps, and working fluids. Within the section "Automotive New components" several speakers focused on the use of R744 (CO2) in Mobile Air Conditioning, its technical requirements, and global environmental benefits.
Other contributions regarding CO2 (R744) technology focused on:
Performance, comparisons and simulation models of CO2 compressors, internal heat exchangers and expansion devices for stationary and mobile air conditioning applications
Presentation of a new reciprocating piston compressor for transcritical CO2 cycles
Environmentally-friendly heat exchangers - CO2 applications for glycol air coolers
Application of natural refrigerants in the evaporation temperature range -52°C to -35°C
A separate students event on Wednesday afternoon showed that young academics are intensifying their research efforts in the field of CO2 technology, e.g. through the development and initial operation of a test facility for Mobile Air Conditioning based on transcritical CO2 cycles.
"The response to CO2 technology was very positive. We saw that constant progress has been made in this area. The new academic generation is focusing more and more on systems working with R744," said Armin Hafner, Research Scientist from the Norwegian SINTEF Institute.
The "Deutsche Kälte-Klima-Tagung 2006" was organized by the German Refrigeration and Air Conditioning Association (Deutscher Kälte- und Klimatechnischer Verein). This year's event attracted around 700 participants.