The next generation of R290 refrigerant potential environmental protection refrigerants

with ozone depletion and global warming becoming more serious, looking for environmentally friendly refrigerant has become an important examination questions in front of refrigeration industry. Refrigerant is the working medium in the refrigeration system, its circulating flow in the cooling system, through their own thermal state changes occur energy exchange with the outside world, so as to achieve the purpose of refrigeration. In the air conditioning system, is by evaporation and condensation, the heat transfer of a working fluid, commonly known as freon. The next generation of R290 refrigerant potential environmental protection refrigerants widely use freon refrigerant R410A can be divided into the CFC, as, HFC and mixed refrigerants. Early CFCs products, hereinafter referred to as CFCs, mainly including the R11, R12, R113? , R115, R500, R114, manufacturing in the early discovery freon chemical stability, has no flammability and toxicity, were used as refrigerants are widely used in household appliances, daily chemicals, fire equipment, etc. In the late 1980 s, the production and use of freon peak, emissions into the atmosphere of the world's freon has reached 20 million tons. Due to their average life expectancy in the atmosphere for hundreds of years, the chemical stability of freon will are broken down in under the action of strong ultraviolet ray, releasing the chlorine atom chain reaction will happen with an ozone molecule, destroying the ozone layer, appeared a lot of hole in the ozone layer. Due to the effect to the destruction of the ozone layer, the Montreal protocol has listed a kind of controlled substances, has been banned. Then developed to replace CFCS hydrogen products, hereinafter referred to as HCFCs, mainly including R22, R123, R141b and R142b, ozone depletion coefficient is only a few percent of R11, therefore, at present as kind material is regarded as CFC is a class of important transitional alternative material. The next generation of R290 refrigerant potential environmental protection refrigerants new environmental protection refrigerant - — Later developed more environmentally friendly refrigerant R290 hydrogen fluoride hydrocarbons, referred to as 'HFCs, mainly including everything, R125, R32, R407C, R410A, R152, etc. , the ozone depletion coefficient is 0, but will produce the greenhouse effect. 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. Currently, household appliances all refrigerants used by almost all of them are freon products, non freon refrigerant so far has not yet been developed. Is a kind of CFCS products banned by the government, the relative environmental protection some hydrogen and hydrogen fluoride hydrocarbon refrigerants, CFCS products also have quite a long time. With the application and development of the refrigeration and air conditioning technology, the demand for refrigerant is also on the rise year by year, every year hundreds of tons of consumption. So from the point of long-term effects, revive the nature itself exists working medium is to achieve an ideal choice for the sustainable development of environment and resource. The next generation of R290 refrigerant potential environmental protection refrigerants in the ozone layer over Antarctica appear R290 refrigerant potential of the next generation of environmental protection refrigerants on September 16th, as the international day of the ozone layer protection on February 29, 2016, shenzhen, China, held a 'room air conditioner industry in the asia-pacific region environment friendly alternative technology seminar', this seminar by the environmental protection department of environmental protection cooperation center ( MEP/FECO) , the United Nations environment programme ( UNEP) Hosted, shenzhen living environment committee, aims to further promote domestic air conditioning industry out HCFCs and promote the development of environmental friendly alternative technologies, solve facing the combustible working medium substitute industry technology and promotion of obstacles. From 28 countries in asia-pacific region hundred agency officials and practitioners attended the seminar. R290 as a kind of environmentally friendly refrigerant, there is no doubt that became the protagonist of the meeting. R290, namely, propane, as hydrocarbon working medium of the existence of nature, is a kind of new environmental protection refrigerants, with zero ODP ( Ozone depletion QianZhi) 、GWP( Global warming ozeme depletion potential) The characteristics of extremely low by industry as 'potential environmental protection refrigerants, and performance in energy conservation and emissions reduction and control the greenhouse effect is excellent, can be used as an ideal replacement of HCFCs refrigerant materials. But its flammability, so safety is becoming a hot spot of meeting to discuss. To this, it is pointed out that: in the home air conditioning R290 perfusion measure 500 g, but the possibility of an explosion at a little, with reliable technical support, the safety of R290 air conditioning is much higher than that of liquefied petroleum gas as fuel quality; Second, R290 even burning, and generate only no toxicity of carbon dioxide and water, will not appear as HFCs refrigerant combustion produces toxic substances. In general, the combustibility of R290 aren't going to be as a room air conditioner refrigerant. The next generation of R290 refrigerant potential environmental protection refrigerants R290 refrigerant air conditioning production line is also discussed the R290 deployment workshop air conditioning each region in the size of the market and the progress on production line: including domestic, our country has completed 9 R290 production line, and another 11 production lines is under renovation. In the international market, India since 2012, has sold over 200000 sets of R290 air conditioning, the maldives gree in the production of a batch of R290 air conditioning has been running smoothly for 5 years, in the case of do not make any maintenance measures did not happen any safety problem, the safe stability.