Market Value Analysis for Ammonia and Fluorine

Ammonia（NH3）

    Ammonia is used longest refrigerating gas .It is without color and smell .Its density is lower than the air .So when ammonia leak , pl crouch because of ammonia being on the air .Has good thermal performance, high cycle, moderate low pressure, and has great cooling capacity per unit volume and higher cooling factor. Before freon refrigerant does not appear in the large and medium-compression refrigeration device, almost dominate the world. However, toxic and irritating odor of ammonia, mixed with air explosion hazard. Ammonia mixed with water to corrode copper and copper alloys. At present, the air conditioning system hardly been used.

Fluorine（R22 and R507a）

    We ice block machine and other ice machine adopt the fluorine system .Usually ,it is R22 and R507a.

    Halogen derivatives of saturated hydrocarbons , freon compound according to the different atoms , there can be many varieties of freon. Required number method , many code can be compiled , such as R22, R134a , etc. Freon is the 1930s with the development of organic chemistry and the development of industrial organic compounds . Should be recognized that the emergence of many varieties of freon , so compression refrigeration technology has been greatly improved and developed. However, in nearly half a century applications, eventually found most commonly used Freon refrigerants such as R11, R12, R13, R113, R502 , etc., can seriously damage the ozone layer , affecting the ecological balance , the crisis of human existence .

    R22 overall performance is excellent, with good thermal performance . Such as: operating pressure is moderate ; cooling capacity per unit volume after ammonia ; isentropic index below ammonia, therefore , at the same pressure ratio , exhaust temperature lower than the ammonia ; and non-toxic , non- burning and no danger of explosion and so on. R22 and gradually decreased with the emergence of its price , it is air conditioning and refrigeration systems to a wide range of applications . In addition, all Freon resistant copper fluoride varnish and motor are ineffective, therefore , to make various types of compact hermetic compressor to be used. At present, the various types of home air conditioning and cold ( hot ) water unit , most choose R22 refrigerant.