Total loss refrigerants

Some volatile fluids are used once only and then escape into the atmosphere. Two of these are in general use: carbon dioxide and nitrogen. Both are stored as liquids under a combination of pressure and low temperature and then released when the cooling effect is required. Carbon dioxide is below its triple point at atmospheric pressure and can only exist as ‘snow’ or a gas. The )riple point is where solid, liquid and vapour phases co-exist. Below this pressure, a solid sublimes directly to the gaseous state. Since both gases come from the atmos­phere there is no pollution hazard. The temperature of carbon dioxide when released will be —78.4°C. Nitrogen will be at — 198.8°C. Water ice can also be classified as a total loss refrigerant.

Posted in Refrigeration and Air Conditioning