The reason why ammonia is used as refrigerant

The reason why ammonia is used as refrigerant is because the production process of ammonia is mature and easy, which will not destroy the ozone layer and produce greenhouse effect. The pressure in the condenser and evaporator is moderate (the condensation pressure is generally 0.98 1MPa, and the evaporation pressure is generally 0.098-0.49 MPa); ); The refrigerating capacity per unit volume is greater than CFC- 12 and HCFC-22；; The latent heat of vaporization is large, and the refrigeration heat release coefficient is high. At the same temperature and refrigeration capacity, the volume of ammonia compressor is the smallest. Ammonia refrigerant is widely used in large cold storage and supermarket food display cabinets.

Ammonia (ammonia), or "ammonia gas", is a compound of nitrogen and hydrogen with the molecular formula NH? It is a colorless gas with a strong pungent smell. It is very soluble in water. At normal temperature and pressure, 1 volume of water can dissolve 700 times the volume of ammonia, and the aqueous solution is also called ammonia water. Cooling and pressurizing can become liquid, and liquid ammonia is refrigerant. Ammonia is also an important raw material for manufacturing nitric acid, fertilizers and explosives. Ammonia is very important to life on earth. It is an important component of many foods and fertilizers.