The interest surrounding the use of carbon dioxide (CO2 R744) in refrigeration systems derives from the need to reduce environmental pollution, especially as regards the formation of the hole in the ozone layer and the increase in the greenhouse effect.
The importance of these aspects is also a result of more than 160 countries signing up to “Kyoto Protocol”, an international treaty on the environment.
The treaty obliges above all the industrialised countries to reduce polluting emissions (carbon dioxide and another five greenhouse gases) by no less than 5.2% below the 1990 levels (considered as the reference year), in the period from 2008 to 2012.
