Suitability of hydrocarbons for low and ultra-low temperature freezers
- For ultra-low temperature freezers down to -80°C, it is particularly relevant that ethane (R170) is available as a low boiling point hydrocarbon refrigerant, according to the authors. The properties that are achieved by mixing ethane with other hydrocarbons, allows the replacement of HFC based low temperature refrigerants.
- For low temperature freezers down to -40°C, it is possible to apply propane (R290) or, when the cooling capacity is not sufficient, propylene (R1270).
Hydrocarbons in laboratory equipment save on energy and emissions
After drawing on the case of the conversion of a laboratory freezer to hydrocarbos, to discuss safety standards governing hydrocarbon refrigerants (i.e. standard EN 60335-2-24), as well as illustrating the energy and CO2 savings realised by hydrocarbon technology, the authors conclude that the natural refrigerant forms and excellent solution for laboratory equipment applications. Finally they note that it is important that careful consideration of safety of products be taken and existing provisions of current electro-mechanical safety standards for flammable refrigerants be followed.