Due to household refrigerators
, air conditioners and freezers are used refrigerants, for widespread cognition.
Thus refrigeration and air conditioning industry become the destruction of the ozone layer and manufacture of the greenhouse effect.
But most people rarely know, freon emissions are caused by chemical industry production process, air conditioning refrigerant leakage is only a small part.
Air conditioning refrigerant can destroy ozone because refrigerant in the presence of hydrogen fluorine chlorine hydride element, and cause the greenhouse effect is mainly due to refrigerants in the process of slow oxidation decomposition, generate large amounts of greenhouse gases, such as CO2, etc.
So, according to the molecular structure of the air conditioning refrigerant can be roughly divided into the following three categories: 1.
CFCS classes: referred to as 'CFC, mainly including the R11, R12, R113? , R115, R500, R114, etc. , because of the destruction of the ozone layer, the largest is the Montreal protocol as a kind of controlled substances, such substances are now bans the use, in the process of manufacture of polyurethane sponge, R11 by R141b as transitional substitutes.
Hydrogen CFCS: as for short, mainly including refrigerant R22
, R123, R141b and R142b, ozone depletion coefficient is just R11 smaller, therefore, at present as kind substance is regarded as CFC type of the most important transitional alternative material.
In the Montreal protocol as refrigerant R22 were limited in 2030.
Hydrogen fluoride hydrocarbons, referred to as 'HFC, mainly including everything refrigerants, refrigerant R407C, R410A refrigerant, such as ozone depletion coefficient is 0, but warming ozeme depletion potential is very high.
In the Montreal protocol has not stipulated the use period, in the United Nations framework convention on climate change as a greenhouse gas in the Kyoto protocol.
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