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Environment | From 10900 to 1 Global Warming Potential CO2 – the eco-friendly refrigerant

When discussions about “destruction of the ozone layer”, “greenhouse gases” and “global warming” arise, refrigerants are always involved. Developing cooling processes and liquids over the years CO2 seems to be best suited being technically relevant and eco-friendly. A refrigerant together with lubricating oil in a certain ratio, called OCR, is used in any cooling device. Reliably measuring the OCR is most crucial and critical for this process and device.

1 Historical Evolution of Coolants

When Carl von Linde built the first "carbonic acid machine" in 1882 and put it into operation at the Krupp company in Essen, nobody suspected at this time what heights and depths this natural refrigerant would undergo in the next 120 years. At the end of the 19th century, carbon dioxide (CO2) was the standard refrigerant along with ammonia (NH3) and sulfur dioxide (SO2).

In 1907, there were 23 companies in German-speaking countries who were directly involved in the construction of carbon dioxide refrigerators.

Ongoing developments recognized the favorable properties of halogenated hydrocarbons as a refrigerant in 1930 and enabled their large-scale industrial production those days.

Thus, at the beginning of the 1930s, the natural working substances such as carbon dioxide, hydrocarbons and sulfur dioxide were completely replaced on the market by fluoro-chloro-hydrocarbons (CFCs).

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