Europe. Optimizing the use of natural refrigerant carbon dioxide was the main topic eurammon focused on to present the eurammon natural refrigeration award in 2009.The first prize was won by Julia Mildenberger of the Technical University of Braunschweig and her thesis on R744 "two phases of natural circulation for the defrosting of the heat pump". As part of his study, Mildenberger talks about a new and more efficient energy method for defrosting carbon dioxide that works with the heat pump evaporator.
The second award was presented to Samer Sawalha of the Royal Institute of Technology in Stockholm for his thesis "Carbon dioxide in supermarket refrigeration".
The third winner was Stefan Elbel of the University of Illinois, with his theme "the experimental and analytical research of a two-phase ejector used for the recovery of work expansion in a transcritical R744 air in an air conditioning system".
Monika Witt, president of eurammon, explained that the fact that the three winners had investigated different aspects of carbon dioxide is a breakthrough in the industry, which seeks to take advantage of the potential of this refrigerant.
