Is it not possible to make a refrigerant that affects neither the ozone layer nor global warming?
There are two categories of candidate refrigerants that would neither affect the ozone layer nor contribute to global warming: the first are natural refrigerants such as carbon dioxide or propane; the second are new man-made materials. To date, no promising material has been discovered. Daikin has carried out research on refrigerants that would have very little environmental impact. Unfortunately, we have not yet discovered a material that has the appropriate stability, efficiency, and safety required of an air conditioner refrigerant. A national project was launched in an attempt to discover a new refrigerant, but it failed to come up with a suitable material for use in air conditioners though low pressure refrigerant for chillers were found.
